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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 2486. Отображено 100.
25-10-2012 дата публикации

Processing copper sulfide ores

Номер: US20120266723A1
Автор: Iffat Tahira Siddique, Izhar Ul Haq Khan
Принадлежит: University of Education

Copper is chemically extracted from crude ores by first roasting it at temperature up to 500° C. for 90 minutes, then treating it with ammonium salt followed by leaching with sulfuric acid to obtain a soluble copper mass for further purification.

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Номер записи: 1
15-08-2013 дата публикации

LEACHING PROCESS FOR COPPER CONCENTRATES CONTAINING CHALCOPYRITE

Номер: US20130209335A1
Автор: Dixon David G., Nazari Ghazaleh T.
Принадлежит: The Univeristy of British Columbia

A method of recovering copper from chalcopyrite concentrate by chemical leaching, using pyrite and silver. The catalytic properties of pyrite in the chalcopyrite leaching process are significantly enhanced by pretreating the pyrite with silver ions. Particulate pyrite is exposed to a solution containing silver ions to form silver-treated pyrite. Particulate chalcopyrite and the silver-treated pyrite are mixed in an acidic sulfate leach solution. The copper is leached from the concentrate in the leach solution in the presence of an oxygen-containing gas, under conditions whereby the pyrite is substantially unoxidized. The leached copper is recovered from the solution by conventional methods. The used silver-treated pyrite is recycled to the leaching process. 1. A method of recovering copper from chalcopyrite concentrate , comprising the steps of:(a) exposing particulate pyrite to silver ions to form a silver-treated pyrite;(b) mixing the concentrate in particulate form with the silver-treated pyrite in an acidic sulfate leach solution;(c) leaching the copper from the concentrate in the leach solution, in the presence of an oxygen-containing gas, under conditions whereby the pyrite is substantially unoxidized, to produce a solution containing copper ions; and(d) recovering the leached copper from the solution.2. A method according to claim 1 , wherein step (a) comprises applying a solution of soluble silver salt to the pyrite claim 1 , whereby the pyrite adsorbs the silver ions.3. A method according to claim 2 , wherein the application is done by one of soaking the pyrite in the solution of soluble silver salt and spraying the solution of soluble silver salt on the pyrite.4. A method according to claim 2 , wherein the silver salt is silver nitrate.5. A method according to claim 1 , wherein the pyrite to chalcopyrite weight ratio of the pyrite being added to the chalcopyrite in the concentrate being added is 1:1 or higher.6. A method according to claim 1 , wherein the ...

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Номер записи: 2
29-08-2013 дата публикации

METHOD FOR LEACHING OF COPPER AND MOLYBDENUM

Номер: US20130220078A1
Автор: Johnston Garry Mervyn, Sutcliffe Matthew Leslie, Welham Nicholas James
Принадлежит: Metaleach Limited

A method for leaching copper and molybdenum from an ore, residue and/or concentrate containing such, in which more than 1% of the total molybdenum is present as a sulfide and in which more than 1% of the total copper is present as an oxide, the method comprising the steps of: Exposing the ore, residue and/or concentrate to an aqueous solution of chlorine (I)-based oxidising species of a p H of at least 3.0; Allowing and/or facilitating the oxidation of the molybdenum by the chlorine-based oxidising species thereby providing a treated ore, residue and/or concentrate and a reduced aqueous solution of chlorine-based oxidising species; and Leaching the treated ore, residue and/or concentrate by exposing the treated ore, residue and/or concentrate to an aqueous ammoniacal ammonium carbonate solution to form a pregnant leach solution containing both copper and molybdenum; Passing the pregnant leach solution containing both copper and molybdenum to a means for metal recovery. 1. A method for leaching copper and molybdenum from an ore , residue and/or concentrate containing such , in which more than 1% of the total molybdenum is present as a sulfide and in which more than 1% of the total copper is present as an oxide , the method comprising the steps of:Exposing the ore, residue and/or concentrate to an aqueous solution of chlorine (I)-based oxidising species of a pH of at least 3.0;Allowing and/or facilitating the oxidation of the molybdenum by the chlorine-based oxidising species thereby providing a treated ore, residue and/or concentrate and a reduced aqueous solution of chlorine-based oxidising species; andLeaching the treated ore, residue and/or concentrate by exposing the treated ore, residue and/or concentrate to an aqueous ammoniacal ammonium carbonate solution to form a pregnant leach solution containing both copper and molybdenum;Passing the pregnant leach solution containing both copper and molybdenum to a means for metal recovery.2. The method according to ...

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Номер записи: 3
19-12-2013 дата публикации

Sustainable process for reclaiming precious metals and base metals from e-waste

Номер: US20130336857A1
Автор: Dinakar Gnanamgari, Fred Strickler, James Norman, John Warner, Laura Ingalls, Michael B. Korzenski, Ping Jiang, Ted Mendum
Принадлежит: Advanced Technology Materials Inc

Processes for recycling electronic components removed from printed wire boards, whereby precious metals and base metals are extracted from the electronic components using environmentally friendly compositions. At least gold, silver and copper ions can be extracted from the electronic components and reduced to their respective metals using the processes and compositions described herein.

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Номер записи: 4
23-01-2014 дата публикации

METHOD OF ORE PROCESSING

Номер: US20140023572A1
Автор: HAWKER William, VAUGHAN James
Принадлежит: The University of Queensland

A method of selectively leaching a metal such as nickel from an ore or ore processing intermediate comprising the metal and cobalt. The ore or ore processing intermediate is contacted with an acidic leach solution comprising an amount of an oxidising agent sufficient to oxidise a major portion of the cobalt to thereby cause it to be stabilised in the solid phase while a major portion of the metal is dissolved for subsequent recovery. 1. A method of selectively leaching a metal selected from the group consisting of nickel , copper and zinc from a solid ore or ore processing intermediate comprising the metal and cobalt including the step of contacting the solid ore or ore processing intermediate with an acidic leach solution comprising an amount of an oxidising agent sufficient to oxidise a major portion of the cobalt to thereby cause it to be stabilised in the solid phase while a major portion of the metal is dissolved.2. The method of wherein the metal is nickel.3. The method of wherein the solid ore or ore processing intermediate is a mixed nickel-cobalt hydroxide precipitate.4. (canceled)5. The method of wherein the oxidising agent has sufficient oxidising potential to oxidise cobalt(II) to cobalt(III).6. The method of wherein the oxidising agent has an oxidative potential of greater than about 0.5 V (SHE).7. The method of wherein the oxidising agent has an oxidative potential of about 0.5 V to about 3.0 V (SHE).8. The method of wherein the leach solution has a pH from about 1 to about 6.9. The method of wherein the leach solution has a pH from about 2 to about 5.10. The method of wherein the oxidising agent has an oxidative potential of about 0.5 V to about 3.0 V (SHE) at a pH from 0 to 6.11. The method of wherein the oxidising agent has an oxidative potential of about 0.5 V to about 1.0 V (SHE) at a pH from 4 to 6.12. The method of wherein the oxidising agent has an oxidative potential of about 1.0 V to about 2.0 V (SHE) at a pH from 1 to 4.13. The method of ...

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Номер записи: 5
13-02-2014 дата публикации

Process of Gold and Copper Recovery From Mixed Oxide - Sulfide Copper Ores

Номер: US20140044618A1
Автор: Ostrea Antonio M.
Принадлежит:

The present invention relates to a process of gold and copper recovery from gold-containing copper ores obtained from mixed oxide-sulfide copper ore bodies by a series of flotation stages. More specifically, the present invention relates to a process of gold and copper recovery whereby gold-containing ores obtained from mixed oxide-sulfide copper ore bodies, and/or copper flotation by-products thereof, are subjected to at least one flotation step following a dewatering step. In particular, it recovers copper and gold from the oxidized zone of porphyry and other mixed ore deposits. Likewise, the present process allows recovery of copper and gold from the tailings and scavenger concentrates which, in conventional process are no longer viable for further treatment. 1) A process for gold and copper recovery from mixed oxide-sulfide copper ores comprising the steps of:crushing, screening and grinding the ores to appropriate size;subjecting the ground ores to copper flotation, using xanthate as collector, and a suitable frother at a pH range of about 7 to about 8 to obtain a rougher concentrate, a scavenger concentrate and a copper by product,said rougher concentrate undergoes further grinding and flotation to obtain final copper concentrate and cleaner tails;said scavenger concentrate undergoes further grinding before recycling to copper flotation stage; and{'sub': 2', '4, 'said copper by-products undergo further processing by dewatering, then flotation at a pH range of about 5 to about 7 using a fatty acid-xanthate reagent combination as collector or promoter of the gold and a suitable frother to obtain rougher concentrate, scavenger concentrate and scavenger tails, subjecting said rougher concentrate to regrinding and cleaner flotation to separate the gold concentrate from the tailings, leaching the copper-gold concentrate with HSOat a pH of about 1 to about 2 until leaching is completed within 2 to 5 hours followed by liquid-solid separation of the acid leach liquor ...

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Номер записи: 6
07-01-2016 дата публикации

Hydrometallurgical Process for Recovery of Metals and/or Semimetals from Waste Materials Containing Compound Semiconductor Materials and/or Back Contact Materials and/or Transparent Electrically Conducting Oxides (TCOS)

Номер: US20160002750A1
Автор: Palitzsch Wolfram
Принадлежит:

The present invention relates to a hydrometallurgical process for recovery of metals and/or semimetals from waste materials, such as high-tech or green-tech wastes, and/or electrical and electronic waste containing compound semiconductor materials and/or back contact materials and/or transparent electrically conducting oxides (TCOs), wherein the waste materials according to the invention are mixed thoroughly with a reaction solution of water, 1 to 5% by mass sodium bisulphate and 1-5% by mass sodium chlorite or with a reaction solution of water, 1 to 50% by mass organosulphonic acid and in the stoichiometric ratio to the organosulphonic acid 1-5% by mass of an oxidizing agent, and the metals and/or semimetals that are to be recovered are dissolved. 2. The hydrometallurgical method according to claim 1 , characterized in that claim 1 , in the case of a carrier matrix present in the waste materials claim 1 , after completion of the dissolving process of the metals to be recovered from the carrier matrix and transition into the reaction solution claim 1 , the separation of the polymetallic solution having the metals to be recovered now contained from the remaining solid carrier matrix of the waste materials claim 1 , from which the pollutants have been removed claim 1 , is performed and the carrier matrix freed of the metals to be recovered is subsequently washed using water.3. The hydrometallurgical method according to claim 1 , characterized in that the washed carrier matrix and the washing water are disposed of separately claim 1 , and the washing water is temporarily stored for a new batch of the method.4. The hydrometallurgical method according to claim 1 , characterized in that pure organo-sulfonic acid in the form of methylsulfonic acid is added to the reaction solution.5. The hydrometallurgical method according to claim 1 , characterized in that perborates claim 1 , percarbonates claim 1 , hypochlorites claim 1 , or peroxides are used as the oxidizing agent.6. ...

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Номер записи: 7
04-01-2018 дата публикации

METHOD OF LEACHING COPPER FROM COPPER SULFIDE ORE AND METHOD OF EVALUATING IODINE LOSS CONTENT OF COLUMN LEACHING TEST OF THE COPPER SULFIDE ORE

Номер: US20180002781A1
Автор: KAWASHIRO Shintaro, Miura Akira
Принадлежит: JX NIPPON MINING & METALS CORPORATION

A method of leaching copper from a copper sulfide ore which includes adding a potential adjustment agent for lowering a potential of a leaching solution obtained after leaching copper from the copper sulfide ore by using iodide ion and iron (III) ion, the leaching solution being stored in a tank for storing the leaching solution. 1. A method of leaching copper from a copper sulfide ore comprising adding a potential adjustment agent for lowering a potential of a leaching solution obtained after leaching copper from the copper sulfide ore by using iodide ion and iron (III) ion , the leaching solution being stored in a tank for storing the leaching solution.2. A method of leaching copper from a copper sulfide ore comprising:a copper leaching step for leaching copper from the copper sulfide ore by using iodide ion and iron (III) ion;a step for adding a potential adjustment agent for lowering a potential of a leaching solution obtained by the copper leaching step and storing the leaching solution;a step for recovering a solution containing iodine from the leaching solution in which the potential adjustment agent is added; anda step for supplying a solution containing recovered iodine to the copper leaching step.3. The method according to claim 2 , wherein the step for recovering the solution containing iodine comprises a step for treating the leaching solution with an activated carbon and allowing the activated carbon to adsorb iodide ion in the leaching solution.4. The method according to claim 1 , wherein the potential adjustment agent comprises a solution containing iron (II) ion.5. The method according to claim 1 , wherein the potential adjustment agent comprises a sulfurous acid solution or an aqueous solution of sulfite.6. The method according to claim 1 , comprising controlling the potential of the leaching solution at 450 mV (silver—silver chloride electrode reference) or lower.7. The method according to claim 1 , comprising controlling a proportion of iron (III) ...

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Номер записи: 8
12-01-2017 дата публикации

Recovery of Copper from Arsenic-Containing Process Feed

Номер: US20170009318A1
Автор: Kelvin Richard BUBAN, Michael Joseph Collins, Preston Carl Holloway
Принадлежит: Sherritt International Corp

Process to recover copper from a process feed including one or more feed components containing a base metal sulphidic feed, iron, copper and arsenic. Process feed and aqueous quench solution are introduced to a pressure oxidative leaching step with a partial pressure of oxygen above 200 kPa to form free sulphuric acid, to solubilize copper and other metal in the feed as aqueous sulphate compounds and to precipitate arsenic as solid iron arsenic compounds. A treated slurry comprising a liquid phase containing sulphuric acid and copper sulphate, and solids containing the iron arsenic compounds is withdrawn and the liquid phase is separated from the solids. To lessen arsenic re-dissolution and to maintain stability of the solid iron arsenic compounds, one or more of temperature, free acid level and residence time of the treated slurry is controlled. Copper metal is recovered from the separated liquid phase.

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Номер записи: 9
10-01-2019 дата публикации

METHOD FOR RECYCLING COPPER INDIUM GALLIUM SELENIUM MATERIALS

Номер: US20190010578A1
Автор: Gao Yongtao, LIU Junfei, Wang Guan, Wu Guofa
Принадлежит: Hanergy New Material Technology Co., Ltd.

A method for recycling copper indium gallium selenium materials comprises the steps of leaching by using sulfuric acid and hydrogen peroxide, reduction of selenium by using sulfur dioxide, separation of copper by using hydrolysis, alkali separation of indium and gallium, replacement of indium, hydrolysis of gallium, and the like. Leaching is carried out by using sulfuric acid in cooperation with hydrogen peroxide, so that the leaching rate is greatly improved, and acid gas pollution is reduced; PH differential copper is separated by using metal ion hydrolysis, so that costs are low; and in addition, alkali separation of gallium is carried out, separation between indium and gallium can be implemented by merely adjusting the PH of a solution, the separation effect is good, the purities of obtained indium and gallium products are high. 1. A method for recovering copper indium gallium selenide material , comprising the following steps:step A, in which the copper indium gallium selenide material is placed in a ball mill for ball milling;step B, in which the ball milled alloy powders obtained in step A are mixed with a diluted concentrated sulfuric acid and heated up, followed by introducing hydrogen peroxide for leaching; after the leaching is completed, the residue is filtered out to give a leachate;step C, in which the leachate is heated up, followed by introducing sulfur dioxide gas to reduce selenium;step D, in which a sodium hydroxide solution is directly added to the solution after selenium removal; the mixture is stirred at ambient temperature and then allowed to stand, followed by drawing the supernatant; gallium hydroxide and indium hydroxide precipitates and a copper sulfate supernatant are obtained by filtration;step E, in which the copper sulfate supernatant is directly evaporated and crystallized to give copper sulphate pentahydrate;step F, in which a sodium hydroxide solution is added to the gallium hydroxide and indium hydroxide precipitates; the mixture ...

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Номер записи: 10
17-01-2019 дата публикации

SINGLE STAGE PRESSURE LEACH HYDROMETALLURGICAL METHOD FOR UPGRADE OF COPPER CONCENTRATES

Номер: US20190017146A1
Автор: DUNN Grenvil Marquis
Принадлежит:

A hydrometallurgical method for the removal at least one of iron, aluminum, arsenic, sulfur, nickel, cobalt, zinc and cadmium (impurities) from a copper concentrate to produce an upgraded copper concentrate the method comprising the step of: subjecting the copper concentrate to an acidic leaching process (NONOX leach ) in a multi-compartment autoclave using a copper sulfate containing lixiviant under lowered electrochemical conditions, to implement a controlled removal of between 20% and 99% of at least one of the impurities to produce the upgraded copper concentrate. The NONOX leach is conducted to produce the majority of required soluble copper sulfate from a partial oxidation of the feed copper concentrate in a first compartment of the multi-compartment autoclave under particular conditions. 1. A hydrometallurgical method for the removal at least one of iron , aluminum , arsenic , sulfur , nickel , cobalt , zinc and cadmium (impurities) from a copper concentrate to produce an upgraded copper concentrate , the method comprising the step of: to produce the majority of required soluble copper sulfate from a partial oxidation of the feed copper concentrate in a first compartment of the multi-compartment autoclave;', 'to pass the partially oxidised slurry from the first compartment into the second and ensuing compartments of the multi-compartment autoclave;', 'such that a division between the first compartment and the second and ensuing compartments does not permit transfer of unused oxidant gas from the first compartment to the second and ensuing compartments;', 'to provide a non-oxidising atmosphere in the second and ensuing compartments such that a majority of the soluble copper in the partially oxidised slurry from the first compartment is uploaded onto the partially leached solids to provide the upgraded concentrate;', 'employing elevated temperature and elevated pressure to suppress boiling in the leaching process; and', 'utilising acid generated from the ...

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Номер записи: 11
01-02-2018 дата публикации

PROCESS FOR EXTRACTION OF COPPER FROM ARSENICAL COPPER SULFIDE CONCENTRATE

Номер: US20180030573A1
Автор: Beoutis Percy Ponce, Plenge Gustavo
Принадлежит:

A process for extraction of copper from an arsenical copper sulfide concentrate is provided. The process includes atmospheric oxidative leaching of a feed slurry including the arsenical copper sulfide concentrate and an acidic iron sulfate-containing leach solution, in the presence of oxygen, to produce a leach slurry including copper and arsenic dissolved into the leach solution. After dissolving the copper and arsenic, scorodite-containing seed is introduced to the leach slurry to induce precipitation of the arsenic dissolved during the oxidative leaching, as scorodite. The process also includes recovering solids from the leach slurry to produce the solids, including the scorodite, and a pregnant leach solution including the copper, subjecting the pregnant leach solution to solvent extraction for recovering copper and thereby producing a raffinate including sulfuric acid and iron sulfate, and recycling at least a portion of the raffinate including the sulfuric acid and iron sulfate to the oxidative leaching. 1. A process for extraction of copper from an arsenical copper sulfide concentrate , the process comprising:atmospheric oxidative leaching of a feed slurry including the arsenical copper sulfide concentrate and an acidic iron sulfate-containing leach solution, in the presence of oxygen to produce a leach slurry including copper and arsenic dissolved into the leach solution;after dissolving the copper and arsenic, introducing scorodite-containing seed to the leach slurry to induce precipitation of the arsenic dissolved during the oxidative leaching, as scorodite;recovering solids from the leach slurry to produce the solids, including the scorodite, and a pregnant leach solution including the copper;subjecting the pregnant leach solution to solvent extraction for recovering copper and thereby producing a raffinate including sulfuric acid and iron sulfate;recycling at least a portion of the raffinate including the sulfuric acid and iron sulfate to the oxidative ...

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Номер записи: 12
04-02-2021 дата публикации

METHOD FOR DISSOLVING METALLOGENICALLY PRIMARY COPPER METALS OBTAINED FROM ORES AND/OR CHALCOPYRITE CONCENTRATES THAT CONTAIN SAME

Номер: US20210032723A1
Автор: Cortés Cortés Rodrigo Andrés, Domic Mihovilovic Esteban Miguel, Domic Mihovilovic Tihomir Eduardo
Принадлежит: NOVA MINERALIS S.A.

The present invention relates to an autocatalytic reductive chemical procedure with solid-solid interaction in conditions of supersaturation of salts, via the phenomenon of efflorescence in order to dissolve a copper metal, from a metallogenically primary ore or chalcopyrite concentrate that contains same. The method comprises two steps, referred to as “Reductive Activation Step” and “Dry Autocatalytic Reductive Transformation Step” or efflorescence, which can be repeated as many times as necessary to maximise the extraction of copper or base metal of interest. The invention can also be used for sulphurised base metals such as nickel, zinc, cobalt, lead and molybdenum, among others, regardless of the common impurities of sulphurised ores, as occurs with the presence of arsenic. 1. A process for the solubilization of metals from minerals and/or concentrates of sulfide minerals of origin metallogenically primary which contain them , wherein the process comprises the following sequential and/or overlapping stages:(I) stage of Reductive Activation, which corresponds to a non-oxidative stage that includes contacting the mineral or mineral concentrate with chloride ions in acidic environment, and with recirculating solutions of the same process which contain or may contain chloride, ferrous iron and copper ions, always in an environment of low potential and minimum total moisture; and(II) stage of Autocatalytic Dry Reductive Transformation, solid-solid, where reductive conditions are enhanced by means of the efflorescence phenomenon, which promotes an oversaturated environment of chloride, ferrous iron and copper ions, causing the mineral or chalcopyrite concentrate to be reduced to mineralogical species which are solubilized by acid and chloride, this stage concludes with a washing with process solutions, which allows removing the products from the reaction.2. The process according to claim 1 , wherein in stage I ferrous iron is added so as to have an amount of 10 to 50 ...

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Номер записи: 13
06-02-2020 дата публикации

SEPARATION OF COPPER AND MOLYBDENUM SULFIDES FROM PYRITE USING A SEA WATER/DESALINATED WATER HYBRID PROCESS

Номер: US20200040428A1
Автор: Amelunxen Peter A., FERNALD Mark A., Rothman Paul J.
Принадлежит:

A copper/molybdenum separation system uses sea water in the roughing circuit and desalinated water in cleaning circuit. In both roughing circuit and cleaning circuit, hydrophobic engineered media are used to recover the mineral particles of interest. The cleaning circuit includes a molybdenum loading stage configured to contact the conditioned pulp with the engineered media in an agitated reaction chamber, and load the hydrophobic molybdenite on the engineered media. 1. A copper/molybdenum processing system comprisinga roughing circuit anda cleaning circuit, wherein the roughing circuit comprises a sulfide separation stage arranged to receive a slurry comprising a ground ore product and sea water, the ground ore product comprising copper sulfide minerals and molybdenum sulfide minerals, wherein the cleaning circuit comprises a copper/molybdenum separation stage arranged to receive bulk sulfide concentrate mixed with desalinated water, the bulk sulfide concentrate comprising the copper sulfide minerals and the molybdenum sulfide minerals recovered in the roughing circuit.2. The system according to claim 1 , wherein the sulfide separation stage is also arranged to receive engineered media claim 1 , the engineered media functionalized to be hydrophobic so as to attract the copper sulfide minerals and the molybdenum sulfide minerals.3. The system according to claim 1 , wherein the ground ore product also comprises unwanted materials claim 1 , and wherein the roughing circuit further comprises a comminution stage arranged to receive an ore material and the sea water and to provide the ground ore product in the slurry claim 1 , and the sulfide separation stage is further arranged to provide a processed slurry to the cleaning circuit and to discharge at least part of the unwanted materials.4. The system according to claim 3 , wherein the cleaning circuit further comprises a regrinding stage arranged to receive the processed slurry claim 3 , the processed slurry comprising ...

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Номер записи: 14
25-02-2016 дата публикации

INTEGRATED RECOVERY OF METALS FROM COMPLEX SUBSTRATES

Номер: US20160053342A1
Автор: Dahal Madhav
Принадлежит: YAVA TECHNOLOGIES INC.

Described is a method of recovering a metal from a substrate having a metal sulphide, metal oxide, or combination thereof, by contacting the substrate with an aqueous oxidant to oxidize the metal sulphide to elemental sulphur and oxidized metal or convert the complex metal oxide to a metal salt, contacting the oxidized metal or simple metal oxide with ammonium hydroxide to form soluble a ammine complex of the metal to obtain a leachate and residual solids; separating the leachate from the residual solids; and recovering the metal. 1. A method for recovering a metal from a substrate comprising a metal sulphide , metal oxide , or combination thereof , the method comprising:a) contacting the substrate with an aqueous oxidant to oxidize the metal sulphide to elemental sulphur and oxidized metal and/or to convert the metal oxide to metal salt;b) contacting the oxidized metal and metal salt with ammonium hydroxide to form a soluble metal ammine complex to obtain a leachate and residual solids;c) separating the leachate from the residual solids; andd) recovering the metal from one or more of the leachate and the residual solids.2. The method of claim 1 , wherein the aqueous oxidant is selected from the group consisting of a water-soluble peroxide claim 1 , a water-soluble perchlorate claim 1 , a water-soluble hypochlorite and ferric iron.3. The method of claim 2 , wherein the aqueous oxidant is ferric iron claim 2 , optionally further comprising an acid.4. The method of claim 2 , wherein the water-soluble hypochlorite is sodium hypochlorite.54. The method of any one of - claims 1 , wherein the substrate comprises silver claims 1 , copper claims 1 , zinc claims 1 , gold claims 1 , lead claims 1 , or a combination thereof.65. The method of any one of - further comprising precipitation of the metal from the leachate.76. The method of any one of - claims 1 , wherein the substrate is electric arc furnace dust claims 1 , steel dust claims 1 , foundry dust claims 1 , tailings ...

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Номер записи: 15
13-02-2020 дата публикации

Process for leaching metal sulfides with reagents having thiocarbonyl functional groups

Номер: US20200048736A1
Автор: David Dixon, Edouard ASSELIN, Nelson MORA HUERTAS, Zihe REN
Принадлежит: Jetti Resources LLC, University of British Columbia

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.

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Номер записи: 16
10-03-2022 дата публикации

Process for the recovery of metals from polymetallic nodules

Номер: US20220074018A1
Автор: Jan Leyssen, Jean Scoyer, Margot Neven, Michael Baltes, Michel Daniels
Принадлежит: Umicore NV SA

The present disclosure concerns a process for the recovery of valuable metals from polymetallic nodules. A two-stage process using SO2 in an acidic aqueous media is disclosed. In a first step, performed in mildly acidic conditions, Mn, Ni, and Co are dissolved; in a second, more acidic step, Cu is dissolved. Under these conditions, the leachate of the first step contains most of the Mn, Ni, and Co, while being nearly Cu-free. The Ni and Co are precipitated as sulfides; the Mn can be recovered as sulfate by crystallization. Cu, which is leached in the second step, is secretively precipitated, also as sulfide.

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Номер записи: 17
21-02-2019 дата публикации

Heap Leaching

Номер: US20190055624A1
Автор: Paul Leslie Brown, Ralph Peter Hackl, Stephen Charles Grocott
Принадлежит: Technological Resources Pty Ltd

A method of leaching chalcopyrite ores includes the steps of forming agglomerates of fragments of chalcopyrite ores and silver and leaching the agglomerates with suitable leach liquor.

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Номер записи: 18
10-03-2016 дата публикации

SYSTEMS AND METHODS FOR IMPROVED METAL RECOVERY USING AMMONIA LEACHING

Номер: US20160068977A1
Автор: Bolles Thomas R., Gertenbach Dennis D., Robertson Joanna M.
Принадлежит: Freeport Minerals Corporation

Systems and methods for basic leaching are provided. In various embodiments, a method is provided comprising leaching a slurry comprising a copper bearing material and an ammonia leach medium, adding copper powder to the slurry, separating the slurry into a pregnant leach solution and solids, and performing a solvent extraction on the pregnant leach solution to produce an loaded aqueous stream. 1. (canceled)2. A method comprising:leaching a slurry comprising a copper bearing material and an ammonia leach medium;adding to the slurry copper powder comprising greater than ninety percent copper;separating the slurry into a pregnant leach solution and solids; andperforming a solvent extraction on the pregnant leach solution to produce a loaded aqueous stream.3. The method of claim 2 , wherein the copper powder comprises at least one of dendritic copper powder and molten sprayed copper powder.4. The method of claim 2 , wherein the leaching is performed in an anoxic environment.5. The method of claim 2 , further comprising:producing a cobalt precipitate from a raffinate produced by solvent extraction; andsubjecting the cobalt precipitate to a metal recovery process.6. The method of claim 2 , further comprising wet grinding the copper bearing material prior to the leaching.7. The method of claim 2 , further comprising adding sulfur dioxide gas to the slurry.8. The method of claim 5 , further comprising adding ammonium hydrosulfide to the raffinate produced by solvent extraction.9. The method of claim 7 , further comprising adding air to the slurry.10. The method of claim 2 , subjecting the loaded aqueous stream to electrowinning to yield copper metal at a cathode.11. The method of claim 2 , wherein the solvent extraction comprises subjecting the pregnant leach solution to a copper-specific extracting reagent.12. The process of claim 2 , wherein the solvent extraction comprises scrubbing an organic phase with a weak acid.13. The process of claim 12 , wherein the weak acid is ...

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Номер записи: 19
18-03-2021 дата публикации

Process, apparatus, and system for recovering materials from batteries

Номер: US20210078012A1
Автор: Ajay KOCHHAR, Timothy George JOHNSTON
Принадлежит: Li Cycle Corp Canada

An apparatus for carrying out size reduction of battery materials under immersion conditions can include a housing configured to hold an immersion liquid comprising at least one of sodium hydroxide and calcium hydroxide. A first feed chute may define an opening therein for receiving battery materials of a first type into the housing and a first submergible comminuting device may be disposed within the housing and submerged in the immersion liquid to receive the battery materials of the first type from the first feed chute. The first submergible comminuting device may be configured to cause a size reduction of the battery materials of the first type to form a first reduced-size battery material.

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Номер записи: 20
18-03-2021 дата публикации

Process, apparatus, and system for recovering materials from batteries

Номер: US20210078013A1
Автор: Ajay KOCHHAR, Timothy George JOHNSTON
Принадлежит: Li Cycle Corp Canada

An apparatus for carrying out size reduction of battery materials under immersion conditions can include a housing configured to hold an immersion liquid comprising at least one of sodium hydroxide and calcium hydroxide. A first feed chute may define an opening therein for receiving battery materials of a first type into the housing and a first submergible comminuting device may be disposed within the housing and submerged in the immersion liquid to receive the battery materials of the first type from the first feed chute. The first submergible comminuting device may be configured to cause a size reduction of the battery materials of the first type to form a first reduced-size battery material.

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Номер записи: 21
26-03-2015 дата публикации

PROCESS FOR PREPARING A FERRIC NITRATE REAGENT FROM COPPER RAFFINATE SOLUTION AND USE OF SUCH REAGENT IN THE LEACHING AND/OR CURING OF COPPER SUBSTANCES

Номер: US20150082943A1
Автор: Bustos Ernesto Beas, CARTAGENA FAGERSTROM Alejandro, Cartes Christian Hecker, Fagerstrom Manuel Cartagena
Принадлежит:

This invention relates to a process for preparing a ferric nitrate (Fe(NO)) reagent, capable of serving as a solvent and copper species oxidizing agent in the ore curing, heap leaching, and/or run of mine (ROM) leaching of a copper ore hydrometallurgical process located at a brown field or green field, from an aqueous copper raffinate solution from the copper ore hydrometallurgical process of copper ore containing iron (II) (Fe), and the reagent prepared pursuant to this process. 1. A process for producing a ferric nitrate reagent for use in a heap leaching stage of a copper ore hydrometallurgical process of copper ore containing iron (II) located at a green or brown field comprising:a. Providing an aqueous copper raffinate solution from a copper organic solvent extraction stage of a copper ore hydrometallurgical process;b. Concentrating iron (II) in the aqueous copper raffinate solution;c. Forming a first mixture comprising the concentrated aqueous iron (II) solution and an acidic aqueous sodium nitrate solution;d. Effectuating an electrochemical reaction with the first mixture, wherein (i) iron (II) is oxidized to iron (III) to produce the ferric nitrate reagent, (ii) an aqueous sodium hydroxide solution is produced, and (iii) water is produced;e. Forming a second mixture comprising the ferric nitrate reagent, sulfuric acid, water, and the aqueous copper raffinate solution; andf. Dosing the second mixture to the heap leaching stage.2. The process of wherein the concentrating of iron (II) in the aqueous copper raffinate solution is performed by one process selected from the group consisting of (i) an organic solvent extraction process and (ii) a coupled iron oxide precipitation and subsequent solid/liquid separation process.3. The process of wherein the organic solvent extraction process is selected for iron (II) concentration claim 2 , said organic solvent extraction comprised of a first extraction stage to extract iron (II) from the aqueous to organic phase and a ...

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Номер записи: 22
30-04-2015 дата публикации

PROCESSES FOR RECOVERING NON-FERROUS METALS FROM SOLID MATRICES

Номер: US20150114183A1
Автор: Hymer Timothy Roy, Lane William Leonard, MACCAGNI Massimo Giuseppe, Nielsen Jonathan Hylkjier, Olkkonen David Michael
Принадлежит: METALS TECHNOLOGY DEVELOPMENT COMPANY LLC

The present invention relates to a process for recovering non-ferrous metals from a solid matrix comprising the following phases: 1. A process for recovering non-ferrous metals from a solid matrix , the process comprising the phases of:(a) leaching the solid matrix with an aqueous-based solution containing chloride ions and ammonium ions and having a pH within a range of 6.5-8.5, in a presence of oxygen, at a temperature ranging from 100° C. to 160° C. and a pressure within a range of 150 kPa-800 kPa, so as to obtain an extraction solution comprising leached metals and solid leaching residue;(b) separating the solid leaching residue from the extraction solution; and(c) subjecting the extraction solution to at least one cementation so as to recover the leached metals in elemental state.2. The process of claim 1 , wherein the at least one cementation is effected in a plurality of cementation steps in series claim 1 , obtaining from each of the steps a metallic cement claim 1 , containing a metal or a combination of metals claim 1 , and a supernatant solution which is fed to a subsequent cementation step and subjected to further cementation.3. The process of claim 2 , wherein in each of the cementation steps claim 2 , a precipitating metal is added in excess with respect to the metal or the combination of metals to be precipitated.4. The process of claim 3 , wherein a same precipitating metal is added in each of the cementation steps.5. The process of claim 3 , wherein in at least one of the cementation steps claim 3 , the precipitating metal comprises a metallic cement obtained from a subsequent cementation step.6. The process of claim 3 , wherein the supernatant solution obtained from a last cementation step is subjected to electrolysis with recovery of the precipitating metal in elemental state and formation of a regenerated electrolytic solution.7. The process of claim 6 , wherein the regenerated electrolytic solution is used in the phase (a) as the leaching ...

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Номер записи: 23
28-04-2016 дата публикации

METHOD FOR RECOVERING METALS

Номер: US20160115563A1
Автор: KOTIRANTA Tuukka, VALKAMA Kari
Принадлежит: OUTOTEC (FINLAND) OY

The invention relates to a method and apparatus for recovering metals from metalliferous starting materials comprising steps of 1. A method for recovering metals from metalliferous starting materials comprising steps ofi) leaching the metalliferous starting material in chloride-based leaching liquor,ii) withdrawing from the leaching step i) aqueous chloride solution with dissolved metals,iii) recovering metal value from the aqueous chloride solution in a metal recovery process step,iv) neutralizing hydrogen chloride content of the aqueous chloride solution in the metal recovery process step with adding hydrolyzed ammonia to the process solution so as to form ammonium chloride,v) withdrawing ammonium chloride containing process solution to an ammonium regeneration step where calcium-containing reagent is added to generate calcium chloride and ammonia gas and recycling ammonia back to the metal recovery process step iii),{'sub': 2', '2', '4, 'vi) regenerating the CaCl-solution with HSOso as to provide a aqueous HCl solution for recycling to the leaching step i).'}2. The method according to claim 1 , wherein the starting material is selected from the group consisting of base metals such as nickel- and cobalt-containing laterite ores claim 1 , copper claim 1 , cobalt claim 1 , nickel metal-bearing raw materials claim 1 , oxidized metalliferous material containing for example nickel claim 1 , cobalt and copper claim 1 , nickelferous sulphide material containing at least one other metal selected from the group consisting of cobalt claim 1 , copper and iron claim 1 , NiS precipitate claim 1 , nickel matte claim 1 , aqueous metal sulphate-containing solution the metals being selected from the group consisting of cobalt claim 1 , copper claim 1 , nickel and iron claim 1 , nickel sulphide concentrate and mixtures thereof.3. The method according to claim 1 , wherein the temperature in the leaching step is between 80° C. and the boiling point of the solution claim 1 , typically ...

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Номер записи: 24
28-04-2016 дата публикации

METHOD FOR BIOLEACHING AND SOLVENT EXTRACTION WITH SELECTIVE RECOVERY OF COPPER AND ZINC FROM POLYMETAL CONCENTRATES OF SULFIDES

Номер: US20160115564A1
Автор: BUENDIA-CACHU Eric David, ESTRADA -DE LOS SANTOS Francisco, LOPEZ-JUAREZ Alfonso, MONTER- VALENZUELA Ulises, SANCHEZ- VAZQUEZ Belisario
Принадлежит: Servicios Condumex S.A. DE C.V.

A bioleaching and solvent extraction process with selective recovery of copper and zinc from polymetallic sulphide concentrates is described, comprising a bioleaching and ferric ion reducing process and a copper and zinc solvent extraction process. 1. A bioleaching and solvent extraction process with selective recovery of copper and zinc from sulphide polymetallic concentrates , comprising a bioleaching and ferric ion reduction step , followed by a copper and zinc solvent extraction step , wherein the bioleaching and ferric ion reduction step includes the steps of: a) conditioning of a sulphide polymetallic concentrates pulp; b) bioleaching of the sulphide polymetallic concentrates pulp; c) solid separation of the pulp coming from the bioleaching step; and d) ferric ion transformation (reduction); while the copper and zinc solvent extraction step includes the steps of: a) copper solvent extraction and electrolysis; b) arsenic control; and , c) zinc solvent extraction and electrolysis.2. A bioleaching and solvent extraction process with selective recovery of copper and zinc from sulphide polymetallic concentrates claim 1 , according to claim 1 , wherein the pulp conditioning step consists of mixing a sulphide polymetallic concentrate stream (partially attacked) claim 1 , a mine water stream claim 1 , a fresh solid stream of polymetallic sulphides claim 1 , and a zinc depleted aqueous solution stream.3. A bioleaching and solvent extraction process with selective recovery of copper and zinc from sulphide polymetallic concentrates claim 2 , according to claim 2 , wherein during the mixing sulphuric acid is added to adjust pH in a range from 1.4 to 1.8.4. A bioleaching and solvent extraction process with selective recovery of copper and zinc from sulphide polymetallic concentrates claim 1 , according to claim 1 , wherein the bioleaching step is carried out using a plurality of bioreactors of the stirred-tank type having an air injection and diffusion system claim 1 , ...

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Номер записи: 25
28-04-2016 дата публикации

METHOD OF RECOVERING COPPER AND PRECIOUS METALS

Номер: US20160115568A1
Автор: HIETALA Kari, KARONEN Janne, SINISALO Pia, VALKAMA Kari
Принадлежит: OUTOTEC (FINLAND) OY

Provided is a method of recovering copper and one or more precious metals comprising leaching copper-bearing ore and/or concentrate under atmospheric or slightly pressurized conditions at a temperature below the boiling point of the leach solution in a sulfuric acidic solution in the presence of one or more alkali metal or alkali earth metal halides, whereby the total halide concentration is from 30 to 115 g/L, to dissolve copper and to obtain a leaching liquor comprising copper, sulfur species, and halides in solution. The leaching liquor is then subjected to a solid-liquid separation after which a first aqueous pregnant leach solution and a copper depleted leaching residue are obtained. Copper is purified by solvent extraction from the first aqueous pregnant leach solution to obtain a first copper-containing loaded organic solution and a first aqueous raffinate. The copper containing loaded organic solution is stripped and copper is recovered. 1. A method of recovering copper from copper-bearing sulfide ore and/or concentrate comprising the steps of:(a) leaching copper-bearing ore and/or concentrate under atmospheric or elevated pressure up to 300 kPa at a temperature below the boiling point of the leach solution in a sulfuric acid solution in the presence of one or more alkali metal or alkali earth metal halides, whereby the total halide concentration is from 30 to 115 g/L, to dissolve copper and to obtain a leaching liquor comprising copper, sulfur species, and halides in solution;(b) solid-liquid separating the leaching liquor to obtain a first aqueous pregnant leach solution and a copper depleted leaching residue;(c) extracting copper by solvent extraction from the first aqueous pregnant leach solution to obtain a first copper-containing loaded organic solution and a first aqueous raffinate; subjecting a bleed stream of the first aqueous raffinate to a copper hydroxychloride precipitation step; and after solid-liquid separation precipitating impurities from ...

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Номер записи: 26
26-04-2018 дата публикации

COALESCING ELEMENTS IN COPPER PRODUCTION

Номер: US20180112291A1
Автор: Jariwala Chetan P., Jr. Clinton P., Rasmussen Jerald K., Schmidt John J., Sierakowski Michael J., Waller, Weilandt Karl D.
Принадлежит:

A coalescing element for aggregating droplets of an emulsion. The coalescing element includes a nonwoven web substrate. A coalescer that includes the coalescing element can also include a housing and a fluid inlet and a fluid outlet each in fluid communication with the coalescing element. The coalescing element and coalescer may be useful for emulsions that form in solvent extraction/electrowinning copper processing and for other emulsions. 1. A method for producing copper , the method comprising:a) providing an aqueous solution containing copper in dilute acid;b) contacting the aqueous solution with a solution of lixiviant whereby the copper is extracted by the lixiviant to produce a loaded organic; andc) contacting the loaded organic solution with concentrated acid solution to extract the copper from the loaded organic solution into the concentrated acid solution;wherein at least one of b) or c) provides an emulsion, the method further comprising:contacting at least one of the loaded organic solution or the concentrated acid solution with a coalescing element comprising a nonwoven web substrate to coalesce droplets in the emulsion.2. A method for aggregating droplets of an emulsion comprising an organic phase and an aqueous acidic phase , the method comprising: a housing;', 'a coalescing element located in the housing, the coalescing element comprising at least one layer of a nonwoven web substrate; and', {'sub': 50', '50, 'a fluid inlet and a fluid outlet each in fluid communication with the coalescing element, wherein a Ddroplet particle size is bigger by at least a factor of 3 upon flow out of the fluid outlet relative to the Ddroplet particle size upon flow into the fluid inlet.'}], 'contacting a coalescer with a feed of the emulsion, wherein the coalescer comprises;'}3. The method of claim 2 , wherein the emulsion comprises a discontinuous organic solvent phase dispersed in a continuous aqueous acidic phase.4. The method of claim 2 , wherein the emulsion ...

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Номер записи: 27
05-05-2016 дата публикации

SUSTAINABLE PROCESS FOR RECLAIMING PRECIOUS METALS AND BASE METALS FROM E-WASTE

Номер: US20160122846A1
Автор: Gnanamgari Dinakar, Ingalls Laura, Jiang Ping, KORZENSKI Michael B., Mendum Ted, Norman James, Strickler Fred, WARNER JOHN
Принадлежит:

Processes for recycling electronic components removed from printed wire boards, whereby precious metals and base metals are extracted from the electronic components using environmentally friendly compositions. At least gold, silver and copper ions can be extracted from the electronic components and reduced to their respective metals using the processes and compositions described herein. 130.-. (canceled)31. A method of removing more than one metal from e-waste , said method comprising:(a) contacting the e-waste with a first metal digestion composition to form a first extraction liquid and a first extraction solid, wherein the first metal digestion composition comprises at least one oxidizing agent and at least one complexing agent;(b) separating the first extraction solid from the first extraction liquid;(c) contacting the first extraction solid with a second metal digestion composition to form a second extraction liquid and a second extraction solid, wherein the second metal digestion composition comprises at least one oxidizing agent and at least one complexing agent;(d) separating the second extraction solid from the second extraction liquid, wherein the second extraction liquid comprises first metal ions; and(e) contacting the first extraction liquid with an additive to separate second metal ions from third metal ions,{'sub': 2', '2', '3', '5', '4', '2', '4', '4', '2', '4', '3', '4', '3', '4', '3', '4', '4', '4', '3', '4', '2', '2', '8', '4', '2', '2', '8', '3', '4', '3', '2', '2', '8', '3', '4', '2', '3', '4', '3', '3', '4', '3', '3', '4', '3', '3', '4', '4', '3', '4', '4', '3', '4', '2', '8', '3', '3', '2', '2', '2', '2', '3, 'wherein the at least one oxidizing agent comprises methanesulfonic acid (MSA), ethanesulfonic acid, benzenesulfonic acid, 2-hydroxyethanesulfonic acid, cyclohexylaminosulfonic acid, n-propanesulfonic acid, n-butanesulfonic acid, or n-octanesulfonic acid, hydrogen peroxide (HO), FeCl(both hydrated and unhydrated), oxone (2KHSO.KHSO.KSO), ...

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Номер записи: 28
05-05-2016 дата публикации

METHODS OF COPPER EXTRACTION

Номер: US20160122847A1
Автор: Saavedra Salinas Matías
Принадлежит:

The hydrometallurgical copper extraction processes of the present teachings generally including two steps: a conditioning or activating step using low concentrations of ammonia and ammonium in an aqueous solution; and an acid leaching step. The processes of the present teachings can be performed at low temperature, for example, at ambient temperature, and at atmospheric pressure. 1. A method of extracting copper from a copper ore or a copper concentrate , the method comprising:contacting a copper ore or a copper concentrate with an aqueous solution comprising ammonia and ammonium in the presence of an oxygen gas-containing fluid to provide a solid activated copper ore or a solid activated copper concentrate, wherein the aqueous solution has a pH between about 8 to 9.5; andleaching the solid activated copper ore or the solid activated copper concentrate with an acid to provide a pregnant leaching solution.2. The method of claim 1 , further comprising recovering copper from the pregnant leaching solution.3. (canceled)4. The method of claim 1 , wherein the ammonium is derived from one or more of ammonium carbonate claim 1 , ammonium chloride claim 1 , ammonium hydroxide claim 1 , ammonium nitrate claim 1 , and ammonium sulfate.5. The method of claim 1 , wherein the ammonia is derived in situ from the ammonium.6. The method of claim 1 , wherein the contacting step is carried out at atmospheric pressure.7. The method of claim 1 , wherein the contacting step is carried out at a temperature ranging from ambient temperature to about 90° C.8. The method of claim 1 , wherein the oxygen gas-containing fluid comprises air.9. (canceled)10. The method of claim 1 , wherein the copper ore or cooper concentrate comprises chalcopyrite.1120.-. (canceled) This application claims priority to and the benefit of U.S. Provisional Patent Application No. 62/009,017, filed on Jun. 6, 2014, the entire contents of which are incorporated by reference herein.The present teachings relate to copper ...

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Номер записи: 29
03-05-2018 дата публикации

AGGLOMERATION DRUM FOR PRE-TREATING MINERALS

Номер: US20180119247A1
Автор: ENGDAHL TOLEDO Oscar, FLAQUER Juan Carlos, IBÁÑEZ Juan Patricio, IPINZA ABARCA Jorge
Принадлежит:

The present invention refers to an agglomeration drum and to a procedure for the agglomeration of mineral inside said drum for the pretreatment of minerals, both of them mainly used in hydrometallurgy. Said drum and procedure use a system and a phase of recirculation of gases as part of the invention. Additionally, in the agglomeration procedure the process of chemical reactions occurring inside the agglomeration drum is included. The agglomeration drum, agglomeration procedure and the reactive process allow to obtaining uniform, stable and poorly degradable agglomerates that have a bigger agglomerate-reagent contact surface. The agglomerates or aggregates produced in the agglomeration drum and according to the process of the invention increase the extractive yield of the later leaching process thus reducing the creation of preferred ways for the leaching solution in the leaching piles. In addition, the drum and procedure of the invention allow preventing the release of gases to the environment, having a gas recirculation system, which by being closed keeps gases inside the agglomeration drum and process. This recirculation of gases not only allows preventing the release of said gases to the environment, but it also reduces the operating costs by using the recirculated gases as part of the agglomeration process. 1. An agglomeration drum comprising:a main hollow cylinder, inside of which the agglomeration process is performed;a feeding chute provided in the end upstream the main cylinder for the entering of material to the inside of said cylinder through an opening of the feeding chute;a discharge chamber provided in the end downstream the main cylinder opposing to a discharge chute for the discharge of the agglomerate material from the inside of said cylinder;at least one driving device to drive a rotation movement in the main cylinder using the motor means provided in said cylinder and which transmit the movement thereto from the driving device;at least one ...

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Номер записи: 30
25-08-2022 дата публикации

Co-Processing of Copper Sulphide Concentrate with Nickel Laterite Ore

Номер: US20220267877A1
Автор: COLLINS Michael Joseph, HOLLOWAY Preston Carl, SMIT Jan, TSHILOMBO Alain, TUFFREY Nigel Edwin
Принадлежит:

A process to recover nickel, cobalt and copper by co-processing copper-containing sulphide concentrate feed containing one or more of arsenic, antimony, and bismuth, and laterite ore feed containing nickel and cobalt by pressure oxidative leaching. The sulphide concentrate and oxygen are controlled to produce sulphuric acid to leach nickel, cobalt, copper and acid soluble impurities into a liquid phase of an acidic leach slurry, to precipitate iron compounds and a majority of the arsenic, antimony and bismuth as solids, and to produce heat to heat the incoming feeds to a temperature above 230° C. Reacted slurry is withdrawn, solids are separated, and the PLS solution contains the nickel, cobalt, copper and acid soluble impurities. A first solution purification stage on the PLS neutralizes free acid, precipitates one or more of iron, aluminum, chromium and silicon, and, separates as solids, the precipitated impurities and other solids from a first purified solution. Copper is separated from the first purified solution with a solvent extraction step to produce a raffinate solution reduced in copper and a copper loaded organic phase. The organic phase is stripped and copper is recovered with electrowinning. A second solution purification stage is conducted on the raffinate by one or both of neutralizing free acid and precipitating one or more of iron, aluminum, chromium and silicon, followed by separating as solids, the precipitated impurities and other solids from a second purified solution. Nickel and cobalt are recovered as mixed hydroxides or mixed sulphides from the second purified solution. 128-. (canceled)29. A hydrometallurgical process for the recovery of nickel , cobalt and copper , comprising:a) co-processing in a pressure vessel, a feed of a copper-containing sulphide concentrate containing one or more of arsenic, antimony, and bismuth, and a feed of a laterite ore containing nickel and cobalt in a pressure oxidative leaching step under conditions including ...

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Номер записи: 31
25-08-2022 дата публикации

Method for whole component microwave fast digestion and precious metal extraction from ionic liquid of waste circuit board

Номер: US20220267879A1
Автор: Li Bin, Wu Yufeng, YAN Jiewen
Принадлежит:

The invention discloses Method for whole component microwave fast digestion and precious metal extraction from ionic liquid of waste circuit board, and belongs to the field of hydrometallurgy. Based on the theory that microwaves can directly penetrate through a leaching medium to directly heat a circuit board, microwave-assisted leaching can reinforce mass transfer and heat transfer in the traditional leaching process, the leaching time is greatly shortened, and the leaching efficiency is improved. Before leaching, a waste circuit board does not need to be smashed, and environmental protection is achieved while energy is saved. The temperature rising process and reaction time of the reaction can be controlled, the whole process is conducted under the airtight condition, heat loss in the leaching process is avoided, the valuable leaching rate is high, the selectivity is high, and efficient leaching of valuable metal can be achieved. Precious metal leachate is extracted through imidazolium ionic liquid, the selectivity of the imidazolium ionic liquid to gold is high, and the co-extraction phenomenon of gold, nickel, copper and other ions is avoided. The method for extracting the precious metal leachate through ionic liquid is a green and clean recycling method, and the overall recycling rate of gold, nickel and copper can reach 99% or above 1. A method for whole component microwave fast digestion and precious metal extraction from ionic liquid of waste circuit board is characterized in that: the method including the following steps:(1) pretreatment of waste circuit boards: cut the waste circuit boards into small pieces to obtain the waste circuit boards to be leached;(2) configuration of precious metal leaching solution for waste circuit boards: add pure water, thiourea, sulfuric acid, and sodium peroxide to the beaker, and stir until all are dissolved to obtain the leaching solution; the concentration of the extract is: thiourea: 1.5-4 mol/L, sulfuric acid 0.5-2 mol/ ...

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Номер записи: 32
19-05-2016 дата публикации

METHOD FOR BIOLEACHING A METAL PRESENT IN A MATERIAL

Номер: US20160138128A1
Автор: Nicolay Xavier, Vauchel Karine
Принадлежит: MEURICE RECHERCHE ET DEVELOPPEMENT

The invention relates to a method for recovering at least one metal present within a material, said material possibly including iron, said method including a step of supplying a ferrous ion, a step of supplying a ferric ion, and a step of bioleaching at least one metal present in the material by the ferric ions, each one of the steps being implemented by a particular bacterial population. 2. The process as claimed in claim 1 , characterized in that said step of bioleaching said at least one metal is reiterated when the amount of said at least one metal in the material after a bioleaching step is greater than 20% of the initial amount of said at least one metal within the material claim 1 , and more preferentially greater than 50%.3. The process as claimed in claim 1 , characterized in that the process also comprises at least one of the following steps:extraction of at least one substance present in said material and inhibiting a bioleaching bacterial activity and/or an iron-oxidizing bacterial activity, said step being carried out before the step of supplying a ferrous ion,acidification of the material by supplying an acid solution such that the material is in a solution of which the pH is stabilized between 0.5 and 3.0.4. The process as claimed in claim 1 , characterized in that a step of embedding a bacterial population in a cell embedding matrix is present and in that the embedding step comprises the steps of:supplying a liquid embedding medium,supplying a cell embedding matrix compound in the embedding medium according to a weight-to-volume ratio between the embedding matrix compound and the embedding medium of between 5 g/l and 400 g/l,supplying an inoculum of the bacterial population in the embedding medium,forming a cell embedding matrix comprising the bacterial population.5. The process as claimed in claim 4 , characterized in that the cell embedding matrix compound is selected from the group of water-soluble natural or synthetic polymers which can form ...

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Номер записи: 33
17-05-2018 дата публикации

PROCESS FOR LEACHING METAL SULFIDES WITH REAGENTS HAVING THIOCARBONYL FUNCTIONAL GROUPS

Номер: US20180135148A1
Автор: ASSELIN Edward, Dixon David, GHAHREMANINEZHAD Ahmad, OLVERA OLMEDO Oscar, REN Zihe
Принадлежит:

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions. 4. The method of , , or , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 30 mM.5. The method of , , or , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 20 mM.6. The method of , , or , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 10 mM.7. The method of , , or , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 5 mM.8. The method of , , or , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 4 mM.9. The method of , , or , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 3 mM.10. The method of , , or , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 2 mM.11. The method of , , or , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 1.5 mM.12. The method of , , or , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 1.0 mM.13. The method of , , or , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 0.5 mM.14. The method of any one of to , wherein the at least ...

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Номер записи: 34
30-04-2020 дата публикации

PROCESS FOR THE SELECTIVE REMOVAL OF COPPER COMPOUNDS AND OTHER IMPURITIES WITH RESPECT TO MOLYBDENUM AND RHENIUM, FROM MOLYBDENITE CONCENTRATES

Номер: US20200131047A1
Автор: GRAELL MOORE John Patrick, GUZMAN MANZO Manuel Enrique
Принадлежит:

Disclosed is a process for the selective removal of copper compounds, and other impurities with respect to molybdenum and rhenium, from concentrates of molybdenite (MoS) with a copper content that is higher than 0.5% in dry weight. 1. A process for the selective removal of copper compounds and other impurities with respect to molybdenum and rhenium from molybdenite concentrates (MoS) with a copper content of more than 0.5% in dry weight , comprising the following stages:{'sub': '2', 'b': 1', '2', '3', '4, 'mixing a concentrate of impure MoS() with process water and/or a leaching solution that is diluted with sulfuric acid (), with a concentration of sulfuric acid is in the range of 0 to 20 g/l, in a repulping stage (), to obtain a first pulp () with a solid content in the pulp of 50 to 20% in weight, maintaining equivalently a ratio of liquid to solid in the range of 1/1 to 4/1, volume/weight;'}{'b': 4', '6', '5', '7, 'leaching the first pulp () inside a pressure reactor, in a pressurized leaching stage () at an oxidizing atmosphere, with an oxygen-bearing gas (), at a leaching temperature between 110° C.-180° C. with a partial pressure for the oxidizing gas inside the reactor between 20-150 psig (0.1-1.0 MPa) to obtain a second pulp () containing the clean molybdenite concentrate and a solution or mother liquor containing the dissolved impurities, including the sulfuric acid that was generated in situ by the selective oxidation of the sulfur contained in the sulfides that initially formed the impurities in the dirty molybdenite concentrate;'}{'b': 7', '8', '7, 'i': 'a', 'carrying the second pulp () to a cooling tank (), to get a third pulp () with a temperature of at most 60° C.;'}{'b': 7', '9', '10', '11', '6, 'i': 'a', 'carrying the third pulp () to a solid/liquid separation stage () to obtain a clean molybdenite concentrate () with a percentage of copper of less than 0.5% in weight and a liquor () containing the copper and impurities in solution produced by the ...

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Номер записи: 35
26-05-2016 дата публикации

TREATMENT PROCESS FOR EXTRACTION OF PRECIOUS, BASE AND RARE ELEMENTS

Номер: US20160145714A1
Автор: ADAMS Michael David, Liddell Keith Stuart, Smith Lisa Anne
Принадлежит:

This invention describes a hydrometallurgical process for the recovery and separation of valuable elements, in particular gold and silver, from a feed material comprising a refractory, intractable or otherwise poorly responding to conventional treatment routes ores, concentrates and other materials. In particular, the process is a process integrated into one or more existing value element extraction processes. 1. A hydrometallurgical process for extracting gold or silver or both and optionally one or more elements comprised of platinum group metals (PGMs) , base elements , rare metals and/or rare elements , from a feed material comprising one or more refractory or intractable materials , the process comprising the steps of:(i) providing the feed material to a reaction vessel; (a) hot sulfuric acid leaching under pressure and/or atmospheric conditions to produce a product slurry comprising saleable metal sulfates in solution and a solid residue containing saleable metals;', '(b) optionally, conditioning the slurry from a) in sulfuric acid at a concentration of from about 25-300 g/L, or in an alkali at a pH value of from about 10-14.', '(c) optionally heating the solid residue from a) or b) at from about 300-700° C. or about 700-1000° C. under oxidizing and/or reducing conditions;', '(d) chloride leaching the feed material, or the solid residue from step (a) or (b) or (c) in a chloride leaching medium to produce soluble saleable metals in a chloride pregnant leach solution (PLS);', '(e) subjecting the chloride PLS from step (d) to one or more techniques comprising: ion exchange (IX), chelating, molecular recognition technology (MRT), addition of polymeric or other sorbents, solvent extraction, precipitation using hydroxides, ammonia, carbonates or sulfides, electrowinning, and/or reduction to produce one or more intermediate solid or solution products for the recovery of gold and silver, as well as minor associated PGMs and other valuable base or rare metals in the ...

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Номер записи: 36
10-06-2021 дата публикации

BYPRODUCT SCANDIUM RECOVERY FROM LOW GRADE PRIMARY METAL OXIDE ORES

Номер: US20210172041A1
Автор: Duyvesteyn Willem P.C.
Принадлежит:

A method for extracting metal values from a low grade primary metal oxide ore feedstock is provided. The method includes providing a low grade primary metal oxide ore containing a primary metal and scandium; subjecting the ore to acid leaching, thus yielding an acidic leachate; extracting the primary metal and scandium from the leachate, thereby yielding an acidic barren leachate; and using the acidic barren leachate in a subsequent iteration of the acid leaching step. 1. A method for extracting metal values from a low grade primary metal oxide ore feedstock , comprising:providing a low grade primary metal oxide ore feedstock containing a primary metal and scandium;subjecting the ore to acid leaching, thus yielding an acidic leachate;extracting the primary metal and scandium from the leachate, thereby yielding an acidic barren leachate; andusing the acidic barren leachate in a subsequent iteration of the acid leaching step.2. The method of claim 1 , wherein extracting the primary metal from the leachate includes at least one process selected from the group consisting of ion exchange and solvent extraction.3. The method of claim 1 , wherein extracting scandium from the leachate includes at least one process selected from the group consisting of ion exchange and solvent extraction.4. The method of claim 1 , wherein the primary metal is extracted before scandium is extracted.5. The method of claim 1 , wherein scandium is extracted before the primary metal is extracted.6. The method of claim 1 , wherein the primary metal is vanadium.7. The method of claim 1 , wherein the primary metal is titanium.8. The method of claim 1 , wherein the primary metal is copper.9. The method of claim 1 , wherein the primary metal is nickel.10. The method of claim 1 , wherein the primary metal is lithium. This application claims the benefit of priority from U.S. provisional application No. 62/889,207, filed Aug. 20, 2019, having the same inventor, and the same title, and which is ...

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Номер записи: 37
15-09-2022 дата публикации

Process for the recovery of metals from oxidic ores

Номер: US20220290273A1
Автор: Jan Leyssen, Jean Scoyer, Margot Neven, Michael Baltes, Michel Daniels
Принадлежит: Umicore NV SA

A process is disclosed for the recovery of valuable metals from oxidic ores, in particular from polymetallic nodules. The process is suitable for the recovery of Cu, Co, Ni, Fe, and Mn, which are the main metals of interest in such polymetallic nodules. The present process is, among others, characterized by the handling of Fe, which is dissolved and kept in solution until the step of crystallization rather than removed at an earlier stage. A mixed Mn—Fe residue is obtained, which, after thermal treatment, provides a Mn—Fe oxide that is suitable for the steel or for the manganese industry. Excellent Cu, Co and Ni yields are obtained, while Fe is leached and valorized together with Mn.

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Номер записи: 38
17-06-2021 дата публикации

METHOD FOR SEPARATING COPPER, AND NICKEL AND COBALT

Номер: US20210180154A1
Автор: Higaki Tatsuya, Kobayashi Hiroshi, Shoji Hirofumi, TAKENOUCHI Hiroshi
Принадлежит:

Provided is a method for separating copper from nickel and cobalt, which can efficiently and selectively separate copper from nickel and cobalt in a substance containing copper, nickel, and cobalt in a waste lithium ion battery, etc. In this method, a substance containing copper, nickel, and cobalt is sulfurated to obtain a sulfide, the obtained sulfide that contains copper, nickel, and cobalt is brought into contact with an acid solution to obtain a solid containing copper and a leachate containing nickel and cobalt. The sulfide preferably contains copper sulfide as a main component, and contains nickel metal and cobalt metal. In-addition, when bringing the sulfide into contact with the acid solution, the added amounts of the sulfide and the acid solution are preferably adjusted such that the oxidation-reduction potential of the obtained leachate is maintained at 150 mV or less where a silver/silver chloride electrode is a reference electrode. 1. A method for separating copper from nickel and cobalt , the method comprising:sulfurizing a material containing copper, nickel, and cobalt to obtain a sulfide; andbringing the obtained sulfide containing copper, nickel, and cobalt into contact with an acid solution to obtain a solid containing copper and a leachate containing nickel and cobalt.2. The method for separating copper from nickel and cobalt according to claim 1 , wherein the sulfide contains a copper sulfide as a main component and contains a nickel metal and a cobalt metal.3. The method for separating copper from nickel and cobalt according to claim 1 , wherein when the sulfide is brought into contact with the acid solution claim 1 , addition amounts of the sulfide and the acid solution are adjusted such that an oxidation-reduction potential of the obtained leachate is maintained at 150 mV or less where a silver/silver chloride electrode is a reference electrode.4. The method for separating copper from nickel and cobalt according to claim 1 , wherein the acid ...

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Номер записи: 39
01-06-2017 дата публикации

A METHOD OF RECOVERING BASE METALS FROM LOW GRADE ORES AND RESIDUES

Номер: US20170152583A1
Автор: CONRADIE Nicholas, KOTZE Marthie
Принадлежит:

A method of recovering a metal from a low-grade ore which is subjected to cyanide leaching to produce a PLS which contains a metal cyanide which is removed from the PLS by ultrafiltration and nano-filtration, and then acidified and sulphidised to produce a metal sulphide from which the metal is extracted, and hydrogen cyanide which is recycled to the cyanide leaching step. 1. A method for the recovery of at least one metal from a low grade ore or residue , wherein the method includes the following steps:a) cyanide-leaching the low grade ore or residue, at an alkaline pH, to produce a pregnant leach solution which contains at least one metal cyanide;b) upgrading the pregnant leach solution by removing leached or barren solids from the pregnant leach solution;c) subjecting the upgraded pregnant leach solution to ultrafiltration to produce a clarified liquor;d) subjecting the clarified liquor to nano-filtration to produce a metal cyanide concentrate and a permeate;e) subjecting the metal cyanide concentrate to acidification and then to sulphidisation to produce a solution which contains a metal-sulphide and hydrogen cyanide;f) subjecting the solution formed in step e) to a solid/liquid separation step, thereby to recover at least some of the metal sulphide and at least some of the hydrogen cyanide; andh) recycling the recovered hydrogen cyanide to the cyanide leaching (step a)).2. A method according to which is conducted at a pH of between 10 and 11.3. A method according to wherein the solids removed in step b) are washed and separated wash water is then recycled to the upgraded pregnant leach solution.4. A method according to wherein claim 1 , in step e) claim 1 , sulphuric acid is added to the concentrate to lower pH to a value between 2 and 6.5. A method according to which includes the step of recycling the permeate produced in step d) to the cyanide leaching step a).6. A method according to wherein the permeate produced in step d) is subjected to a reverse osmosis ...

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Номер записи: 40
22-09-2022 дата публикации

METHOD FOR PROCESSING ORE OR REFINING INTERMEDIATE

Номер: US20220298600A1
Автор: FUKANO Yuken, MANO Kodai, UENISHI Shigetaka
Принадлежит: JX NIPPON MINING & METALS CORPORATION

A method for processing ores containing gold or refining intermediates containing gold, the refining intermediate being obtained by subjecting the ores to a refining process, wherein the method includes: a leaching step of leaching gold from the ores or the refining intermediates using a sulfate solution containing iodide ions and iron (III) ions as a leaching solution; an adsorption step of adsorbing iodine and gold in the leached solution obtained in the leaching step on activated carbon; and an iodine separation step of separating iodine from the activated carbon while leaving gold on the activated carbon that has undergone the adsorption step. 1. A method for processing ores containing gold or refining intermediates containing gold , the refining intermediate being obtained by subjecting the ores to a refining process ,wherein the method comprises: a leaching step of leaching gold from the ores or the refining intermediates using a sulfate solution containing iodide ions and iron (III) ions as a leaching solution; an adsorption step of adsorbing iodine and gold in the leached solution obtained in the leaching step on activated carbon; and an iodine separation step of separating iodine from the activated carbon while leaving gold on the activated carbon that has undergone the adsorption step.2. The method for processing ores or refining intermediates according to claim 1 , wherein iodine is separated using a sulfurous acid solution in the iodine separation step.3. The method for processing ores or refining intermediates according to claim 1 , wherein an iodine concentration in the leaching solution is from 10 mg/L to 10000 mg/L in the leaching step.4. The method for processing ores or refining intermediates according to claim 1 , further comprising a gold separation step of separating gold from the activated carbon from which iodine has been separated in the iodine separation step.5. The method for processing ores or refining intermediates according to claim 1 , ...

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Номер записи: 41
08-06-2017 дата публикации

LEACHING AIDS AND METHODS OF USING LEACHING AIDS

Номер: US20170159153A1
Автор: Bender Jack Thomas, Brewer Russell Vincent, Emmerich Nathan Clark, Hight Lauren Michele
Принадлежит:

Leaching aids, for example, when present in a leaching solution, and methods of using the leaching aids. The leaching aids can include one or a combination of compounds. The method of using the leaching aids can include a process of recovering metal from ore, for example, a process involving heap leaching, solvent extraction and electrowinning. 1. A solution comprising:a lixiviant; and {'br': None, 'sub': n', 'm', 'n', 'p, 'R((AO)B)((AO)H)\u2003\u2003(I)'}, 'one or more compound comprising formula (I)wherein each AO group is, independently, an alkyleneoxy group selected from ethyleneoxy (“EO”), 1,2-propyleneoxy (“PO”), 1,2-butyleneoxy, and styryleneoxy;each n is independently an integer from 0 to 40;m is an integer from 1 to the total number of OH hydrogens in the R group prior to alkoxylation;p is an integer such that the sum of m plus p equals the number of OH hydrogens in the R group prior to alkoxylation;B is H; [{'br': None, 'sub': 1', '2', '3', '1, 'RC(CHO)(II) wherein Ris H, methyl, ethyl, or propyl;'}, {'br': None, 'sub': 2', '4, 'C(CHO)\u2003\u2003(III);'}, {'br': None, 'sub': 2', '2, 'OC(CHO)\u2003\u2003(IV);'}, {'br': None, 'sub': 2', '2, 'N(CHCHO) \u2003\u2003(V)'}, {'br': None, 'sub': 2', 'x', '2', '2', '2', '1', '4, '(R)N(CHCHO) (VI) wherein Ris a C-Calkyl, y is 1-3 and x+y=3;'}, {'br': None, 'sub': 2', 'r, 'O(CH)O (VII), wherein r is 2 to 6; and'}, {'br': None, 'sub': 3', '2, 'O(CH(CH)CH)O \u2003\u2003(VIII);'}], 'R is a group selected from formula (II) to (VIII)wherein the one or more compound is at a concentration of about 1 ppm to about 2000 ppm of the solution.2. The solution of claim 1 , wherein each n is independently 2 to 20.3. The solution of claim 2 , wherein each n is independently 2 to 10.5. The solution of claim 1 , wherein the lixiviant comprises sulfuric acid.6. The solution of claim 1 , wherein the lixiviant is at a concentration of 1 g/L to about 50 g/L of the solution.7. The solution of claim 5 , wherein the lixiviant is at a ...

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Номер записи: 42
14-05-2020 дата публикации

Process for Leaching Metal Sulfides with Reagents Having Thiocarbonyl Functional Groups

Номер: US20200149131A1
Автор: ASSELIN Edouard, Dixon David, GHAHREMAN Ahmad, OLVERA OLMEDO Oscar, REN Zihe
Принадлежит:

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions. 159. -. (canceled)60. A method of recovering at least one base metal from at least one base metal sulfide in a material , the method comprising:contacting the material with an acidic sulfate solution comprising a reagent having a thiocarbonyl functional group to produce a pregnant solution containing base metal ions; andrecovering the at least one base metal from the pregnant solution,wherein the reagent is not thiourea (Tu), and wherein the thiocarbonyl functional group of the reagent has a sulfur that bears a partial negative charge, bears negative electrostatic potential surface, and has an empty π*-antibonding orbital as its lowest unoccupied molecular orbital.61. The method of claim 60 , wherein the acidic sulfate solution comprises ferric sulfate.62. The method of claim 60 , wherein the reagent is N-N′ substituted thioureas; 2 claim 60 ,5-Dithiobimea; Dithiobiuret; Thiosemicarbazide purum; Thiosemicarbazide; Thioacetamide; 2-Methyl-3-thiosemicarbazide; 4-Methyl-3-thiosemicarbazide; Vinylene trithiocarbonate purum; Vinylene trithiocarbonate; 2-Cyanothioacetamide; Ethylene trithiocarbonate; Potassium ethyl xanthogenate; Dimethylthiocarbamoyl chloride; Dimethyldithiocarbamate; Dimethyl trithiocarbonate; N claim 60 ,N-Dimethylthioformamide; 4 claim 60 ,4-Dimethyl-3-thiosemicarbazide; 4-Ethyl-3-thiosemicarbazide; O-Isopropylxanthic acid; Ethyl thiooxamate; Ethyl dithioacetate; Pyrazine-2-thiocarboxamide; Diethylthiocarbamoyl chloride; Diethyldithiocarbamate; Tetramethylthiuram ...

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Номер записи: 43
14-05-2020 дата публикации

Process for Leaching Metal Sulfides with Reagents Having Thiocarbonyl Functional Groups

Номер: US20200149132A1
Автор: ASSELIN Edouard, Dixon David, GHAHREMAN Ahmad, OLVERA OLMEDO Oscar, REN Zihe
Принадлежит:

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions. 159.-. (canceled)60. A method of recovering at least one base metal from at least one base metal sulfide in a material , the method comprising:contacting the material with an acidic sulfate solution comprising formamidine disulfide (FDS) to produce a pregnant solution containing base metal ions; andrecovering the base metal from the pregnant solution.61. The method of claim 60 , wherein the acidic sulfate solution further comprises ferric sulfate.62. The method of or claim 60 , wherein the concentration of FDS in the acidic sulfate solution is in the range of about 0.1 mM to about 15 mM.63. The method of or claim 60 , wherein the concentration of FDS in the acidic sulfate solution is in the range of about 0.1 mM to about 10 mM.64. The method of or claim 60 , wherein the concentration of FDS in the acidic sulfate solution is in the range of about 0.2 mM to about 5 mM.65. The method of or claim 60 , wherein the concentration of FDS in the acidic sulfate solution is in the range of about 0.1 mM to about 2.5 mM.66. The method of or claim 60 , wherein the concentration of FDS in the acidic sulfate solution is in the range of about 0.1 mM to about 2 mM.67. The method of or claim 60 , wherein the concentration of FDS in the acidic sulfate solution is in the range of about 0.1 mM to about 1.5 mM.68. The method of or claim 60 , wherein the concentration of FDS in the acidic sulfate solution is in the range of about 0.1 mM to about 1.0 mM.69. The method of or claim 60 , wherein the ...

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Номер записи: 44
01-07-2021 дата публикации

Process for Leaching Metal Sulfides with Reagents Having Thiocarbonyl Functional Groups

Номер: US20210198767A1
Автор: Ahmad GHAHREMAN, David Dixon, Edouard ASSELIN, Oscar OLVERA OLMEDO, Zihe REN
Принадлежит: University of British Columbia

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.

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Номер записи: 45
18-09-2014 дата публикации

SYSTEMS AND METHODS FOR IMPROVED METAL RECOVERY USING AMMONIA LEACHING

Номер: US20140260806A1
Автор: Bolles Thomas R., Gertenbach Dennis D., Robertson Joanna M.
Принадлежит: FREEPORT-MCMORAN CORPORATION

Systems and methods for basic leaching are provided. In various embodiments, a method is provided comprising leaching a slurry comprising a copper bearing material and an ammonia leach medium, adding copper powder to the slurry, separating the slurry into a pregnant leach solution and solids, and performing a solvent extraction on the pregnant leach solution to produce an loaded aqueous stream. 1. A method comprising:leaching a slurry comprising a copper bearing material and an ammonia leach medium;adding copper powder to the slurry;separating the slurry into a pregnant leach solution and solids; andperforming a solvent extraction on the pregnant leach solution to produce an loaded aqueous stream.2. The method of claim 1 , further comprising:producing a cobalt precipitate from a raffinate produced by solvent extraction; andsubjecting the cobalt precipitate to a metal recovery process.3. The method of claim 1 , further comprising wet grinding the copper bearing material prior to the leaching.4. The method of claim 1 , wherein the leaching is performed in the presence of sulfur dioxide gas.5. The method of claim 1 , further comprising adding ammonium hydrosulfide to the raffinate produced by solvent extraction.6. The method of claim 4 , wherein the leaching is performed in the presence of air.7. The method of claim 1 , subjecting the loaded aqueous stream to electrowinning to yield copper metal at a cathode.8. The method of claim 1 , wherein the solvent extraction comprises subjecting the pregnant leach solution to a copper specific extracting reagent.9. The process of claim 1 , wherein the solvent extraction comprises a scrubbing an organic phase with a weak acid.10. The process of claim 9 , wherein the weak acid is carbonic acid.11. The process of claim 10 , wherein the carbonic acid is added through dissolving carbon dioxide in water.12. The process of claim 5 , subjecting the loaded aqueous stream to electrowinning.13. A system comprising:a wet grinding apparatus ...

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Номер записи: 46
18-09-2014 дата публикации

SYSTEMS AND METHODS FOR IMPROVED METAL RECOVERY USING AMMONIA LEACHING

Номер: US20140260807A1
Автор: Bolles Thomas R., Gertenbach Dennis D., Robertson Joanna M.
Принадлежит: FREEPORT-MCMORAN CORPORATION

Systems and methods for basic leaching are provided. In various embodiments, a method is provided comprising leaching a slurry comprising a copper bearing material and a leach medium comprising ammonia and ammonium carbonate, adding copper powder to the slurry, separating the slurry into a pregnant leach solution and solids, and performing a solvent extraction on the pregnant leach solution to produce an loaded aqueous stream. 1. A method comprising:leaching a slurry comprising a copper bearing material and a leach medium comprising ammonia and ammonium carbonate;adding copper powder to the slurry;separating the slurry into a pregnant leach solution and solids; andperforming a solvent extraction on the pregnant leach solution to produce a loaded aqueous stream.2. The method of claim 1 , further comprising:producing a cobalt precipitate from a raffinate produced by solvent extraction; andsubjecting the cobalt precipitate to a metal recovery process.3. The method of claim 1 , wherein the leach medium further comprises ammonium sulfate.4. The method of claim 1 , further comprising:producing a cobalt precipitate and a cobalt depleted liquid phase from a raffinate produced by solvent extraction; andadding a portion of the cobalt depleted liquid phase to the slurry during leaching.5. The method of claim 1 , further comprising subjecting the pregnant leach solution to a solvent extraction to yield a loaded aqueous stream.6. The method of claim 5 , wherein an extraction of the solvent extraction yields a cobalt-bearing raffinate.7. The method of claim 6 , precipitating cobalt from the cobalt-bearing raffinate.8. The method of claim 7 , wherein the precipitating yields cobalt sulfide in a solid phase.9. The method of claim 8 , wherein the cobalt sulfide is subjected to leaching.10. The method of claim 5 , subjecting the loaded aqueous stream to electrowinning.11. A system comprising:a wet grinding apparatus configured to grind a metal bearing material;a basic leaching vessel ...

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Номер записи: 47
21-06-2018 дата публикации

Processes for recovering non-ferrous metals from solid matrices

Номер: US20180171432A1
Автор: David Michael Olkkonen, Jonathan Hylkjier NIELSEN, Massimo Giuseppe Maccagni, Timothy Roy Hymer, William Leonard Lane
Принадлежит: METALS TECHNOLOGY DEVELOPMENT Co LLC

A process for recovering non-ferrous metals from a solid matrix may include: (a) leaching the solid matrix with an aqueous-based solution containing chloride ions, ammonium ions, and Cu 2+ ions, having a pH of 6.5-8.5, in a presence of oxygen, at a temperature of 100° C.-160° C. and a pressure of 150 kPa-800 kPa, so as to obtain an extraction solution comprising leached metals and solid leaching residue; (b) separating the solid leaching residue from the extraction solution; and/or (c) subjecting the extraction solution to at least one cementation so as to recover the leached metals in elemental state. The pH may be greater than or equal to 6.5 and less than or equal to 8.5. Temperature may be greater than or equal to 100° C. and less than or equal to 160° C. Pressure may be greater than or equal to 150 kPa and less than or equal to 800 kPa.

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Номер записи: 48
22-06-2017 дата публикации

Apparatus and Process for the Improved Economic Extraction of Metal from a Metal-Bearing Material

Номер: US20170175226A1
Автор: SWARTS Arnoldus Carel
Принадлежит:

The present invention relates to an improved apparatus for economically extracting metal from a metal-bearing material. In particular, the present invention relates to an improved apparatus for extracting metal, including inter alia base metal (i.e. copper) and gold, from a metal-bearing ore, concentrate or other metal-bearing material. The present invention further extends to a process for the extraction of such metal which is carried out in accordance with the aforementioned apparatus. According to a first aspect thereof, the present invention provides an apparatus for extracting metal from a metal-bearing material, said apparatus, including a feed receptacle for receiving a metal-bearing feed stream; a reaction vessel; at least one pump means for delivering the metal-bearing feed stream to the reaction vessel; a means for introducing leaching agents, in the form of a leaching agent solution, to the reaction vessel; a means of agitation by circulating the metal-bearing feed stream and leaching agent solution in the reaction vessel so as to allow for a combination of agitation (tank) leaching and vat leaching to take place; a means for achieving liquid/solid separation; and a means for extracting a metal containing product; —wherein said apparatus is re-locatable and transportable in order to allow the apparatus to be assembled easily on site without being geographically bound to one specific site. 1. An apparatus for extracting metal from a metal-bearing material , the apparatus comprising:a feed receptacle for receiving a metal-bearing feed stream; a reaction vessel; at least one pumping means for delivery of the metal bearing feed stream to the reaction vessel; a means for introducing leaching agents, in the form of a leaching agent solution, to the reaction vessel; a means for agitation and/or stirring and/or circulating the metal-bearing feed stream in the reaction vessel; a means for achieving liquid/solid separation; and a means for extracting a metal- ...

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Номер записи: 49
28-05-2020 дата публикации

INTEGRATED RECOVERY OF METALS FROM COMPLEX SUBSTRATES

Номер: US20200165697A1
Автор: Dahal Madhav
Принадлежит: YAVA TECHNOLOGIES INC.

Described is a method of recovering a metal from a substrate having a metal sulphide, metal oxide, or combination thereof, by contacting the substrate with an aqueous oxidant to oxidize the metal sulphide to elemental sulphur and oxidized metal or convert the complex metal oxide to a metal salt, contacting the oxidized metal or simple metal oxide with ammonium hydroxide to form soluble a ammine complex of the metal to obtain a leachate and residual solids; separating the leachate from the residual solids; and recovering the metal. 1. A method for recovering a metal from a substrate comprising a metal sulphide , or a combination of the metal sulphide and a metal oxide , the method comprising:a) contacting the substrate with an aqueous oxidant to oxidize the metal sulphide to elemental sulphur and oxidized metal and to convert the metal oxide, if present, to a metal salt;b) contacting the oxidized metal and metal salt, if present, with ammonium hydroxide to form a soluble metal ammine complex to obtain a leachate and residual solids;c) separating the leachate from the residual solids; andd) recovering the metal from one or more of the leachate and the residual solids.2. The method of claim 1 , wherein the aqueous oxidant is selected from the group consisting of a water-soluble peroxide claim 1 , a water-soluble perchlorate claim 1 , a water-soluble hypochlorite and ferric iron.3. The method of claim 2 , wherein the aqueous oxidant is ferric iron claim 2 , optionally further comprising an acid.4. The method of claim 2 , wherein the water-soluble hypochlorite is sodium hypochlorite.5. The method of claim 1 , further comprising one or more of the following characteristics:(a) the substrate comprises silver, copper, zinc, gold, lead, or a combination thereof;(b) the method further comprises precipitation of the metal from the leachate;(c) the substrate is electric arc furnace dust, steel dust, foundry dust, tailings, crushed ore, mine sludge, or a combination thereof;(d) ...

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Номер записи: 50
13-06-2019 дата публикации

SYSTEMS AND METHODS FOR METAL RECOVERY

Номер: US20190177864A1
Автор: Baughman David R., Bolles Thomas R., Hazen Wayne W., May Lawrence D., Robertson Joanna M., Smith Jay C.
Принадлежит: Freeport Minerals Corporation

Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, and leaching the roasted metal bearing material in a basic medium to yield a pregnant leach solution. 1. (canceled)2. A process comprising:roasting a metal bearing material comprising a copper carbonate under oxidizing conditions;roasting the metal bearing material under reducing conditions;leaching the metal bearing material in a basic medium to yield a pregnant slurry; andforwarding the pregnant slurry to a CCD circuit to yield a pregnant leach solution.3. The process of claim 2 , wherein the basic medium comprises at least one of ammonia claim 2 , ammonium carbonate and ammonium sulfate.4. The process of claim 2 , wherein the oxidizing conditions comprise an oxygen gas containing atmosphere.5. The process of claim 2 , wherein the reducing conditions comprise a hydrogen gas containing atmosphere.6. The process of claim 2 , further comprising subjecting the pregnant leach solution to a solution extraction process to yield a loaded aqueous stream.7. The process of claim 6 , wherein an extraction stage of the solution extraction yields a cobalt-bearing raffinate.8. The process of claim 7 , further comprising precipitating cobalt from the cobalt-bearing raffinate.9. The process of claim 8 , wherein the precipitating yields cobalt sulfide.10. The process of claim 9 , wherein the cobalt sulfide is subjected to leaching.11. The process of claim 6 , subjecting the loaded aqueous stream to electrowinning.12. The process of claim 2 , wherein the copper carbonate comprises at least one of azurite and malachite.13. A process comprising:oxidizing a metal bearing material comprising a copper carbonate to produce an oxidized metal bearing material;reducing the oxidized metal bearing material to produce a roasted metal ...

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Номер записи: 51
05-07-2018 дата публикации

METHOD FOR LEACHING COPPER FROM COPPER SULFIDE ORE

Номер: US20180187287A1
Автор: Miura Akira, Sato Katsuyuki
Принадлежит: JX NIPPON MINING & METALS CORPORATION

The present invention provides a method for efficiently leaching copper from copper sulfide ore by separating and recovering iodine, and iron(III) ions to be used are regenerated by a heap of stacked ore in the method for leaching copper from copper sulfide using a sulfuric acid solution containing iodide ions and iron(III) ions as a leaching solution. The present invention relates to a method for leaching copper from copper sulfide, comprising the following steps: a copper leaching step for leaching copper from copper sulfide ore using a sulfuric acid solution containing iodide ions and iron(III) ions as a leaching solution to yield a first solution; an iodine separation treatment step for separating iodine in the first solution to yield a second solution having a lowered concentration of iodine therein; and an iron oxidation step for oxidizing the second solution to yield a third solution, leaching the copper sulfide ore or another copper sulfide using the third solution and an aqueous solution containing iodine, wherein the iron oxidation step comprises irrigating the solution after iodine separation treatment onto stacked ore, thereby oxidizing iron(II) ions existing in the solution after iodine treatment and generated by copper leaching. 1. A method for leaching copper from copper sulfide ore , comprising the following steps:a copper leaching step for leaching copper from a copper sulfide ore using a sulfuric acid solution containing iodide ions and iron(III) ions as a leaching solution to yield a first solution;an iodine separation treating step for separating iodine in the first solution to yield a second solution having a lowered concentration of iodine therein;an iron oxidation step for oxidizing the second solution to yield a third solution; andleaching the copper sulfide ore or another copper sulfide ore using the third solution and an aqueous solution containing iodine,wherein the iron oxidation step comprises irrigating the second solution onto a ...

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Номер записи: 52
06-07-2017 дата публикации

METHOD FOR AMMONIACAL LEACHING OF COPPER FROM OXIDISED COPPER ORES

Номер: US20170191144A1
Автор: Johnston Garry Mervyn, Sutcliffe Matthew Leslie, Welham Nicholas James
Принадлежит:

In accordance with the present invention there is provided a method for leaching copper from a oxidised copper ore, wherein at least 5% of the copper present in the oxidised copper ore is an oxidised copper compound, the method comprising the method steps of: applying an aqueous solution of a curing agent to the oxidised copper ore, producing a cured ore; forming a leach solution by applying an ammoniacal solution that has an ammonium carbonate content of less than 20 g/L to the cured ore, producing a pregnant leach solution containing copper; and passing the pregnant leach solution to a means for recovering copper. 1. A method for leaching copper from an oxidised copper ore , wherein at least 5% of the copper present in the oxidised copper ore is in the form of an oxidised copper compound , the method comprising the method steps of:applying an aqueous solution of a curing agent to the oxidised copper ore, producing a cured ore;forming a leach solution by applying an ammoniacal solution that has an ammonium carbonate content of less than 20 g/L to the cured ore,producing a pregnant leach solution containing copper; andpassing the pregnant leach solution to a means for recovering copper.2. A method for leaching copper from an oxidised copper ore , wherein at least 5% of the copper present in the oxidised copper ore is in the form of an oxidised copper compound , the method comprising the method steps of:applying an aqueous solution of a curing agent to the oxidised copper ore, producing a cured ore;forming a leach solution by applying an ammoniacal solution that has an ammonium carbonate content of less than 20 g/L to the cured ore, wherein the leach solution maintains a pH between 6 and 13 producing a pregnant leach solution; andpassing the pregnant leach solution to a means for recovering copper.3. The method for leaching copper from an oxidised copper ore according to claim 1 , wherein the leach solution maintains a pH between 8 and 11 during the leach process.4. ...

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Номер записи: 53
11-06-2020 дата публикации

Process for Leaching Metal Sulfides with Reagents Having Thiocarbonyl Functional Groups

Номер: US20200181731A1
Автор: ASSELIN Edouard, Dixon David, GHAHREMAN Ahmad, OLVERA OLMEDO Oscar, REN Zihe
Принадлежит:

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions. 159.-. (canceled)60. A method of recovering at least one base metal from at least one base metal sulfide in a material , the method comprising:contacting the material with an acidic sulfate solution comprising a reagent having a thiocarbonyl functional group, wherein the reagent is thioacetamide (TA), to produce a pregnant solution containing base metal ions; andrecovering the at least one base metal from the pregnant solution.61. The method of claim 60 , wherein the acidic sulfate solution further comprises ferric sulfate.62. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 30 mM.63. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 20 mM.64. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 10 mM.65. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 5 mM.66. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 4 mM.67. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 3 mM.68. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate ...

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Номер записи: 54
11-06-2020 дата публикации

Process for Leaching Metal Sulfides with Reagents Having Thiocarbonyl Functional Groups

Номер: US20200181732A1
Автор: ASSELIN Edouard, Dixon David, GHAHREMAN Ahmad, OLVERA OLMEDO Oscar, REN Zihe
Принадлежит:

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions. 159.-. (canceled)60. A method of recovering at least one base metal from at least one base metal sulfide in a material , the method comprising:contacting the material with an acidic sulfate solution comprising a reagent having a thiocarbonyl functional group, wherein the reagent is sodium dimethyldithiocarbamate (SDDC), to produce a pregnant solution containing base metal ions; andrecovering the at least one base metal from the pregnant solution.61. The method of claim 60 , wherein the acidic sulfate solution further comprises ferric sulfate.62. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 30 mM.63. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 20 mM.64. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 10 mM.65. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 5 mM.66. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 4 mM.67. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 3 mM.68. The method of claim 60 , wherein the concentration of the reagent in ...

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Номер записи: 55
11-06-2020 дата публикации

Process for Leaching Metal Sulfides with Reagents Having Thiocarbonyl Functional Groups

Номер: US20200181733A1
Автор: ASSELIN Edouard, Dixon David, GHAHREMAN Ahmad, OLVERA OLMEDO Oscar, REN Zihe
Принадлежит:

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions. 159.-. (canceled)60. A method of recovering at least one base metal from at least one base metal sulfide in a material , the method comprising:contacting the material with an acidic sulfate solution comprising a reagent having a thiocarbonyl functional group, wherein the reagent is ethylene trithiocarbonate (ETC), to produce a pregnant solution containing base metal ions; andrecovering the at least one base metal from the pregnant solution.61. The method of claim 60 , wherein the acidic sulfate solution further comprises ferric sulfate.62. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 30 mM.63. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 20 mM.64. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 10 mM.65. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 5 mM.66. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 4 mM.67. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 3 mM.68. The method of claim 60 , wherein the concentration of the reagent in the ...

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Номер записи: 56
11-06-2020 дата публикации

Process for Leaching Metal Sulfides with Reagents Having Thiocarbonyl Functional Groups

Номер: US20200181734A1
Автор: ASSELIN Edouard, Dixon David, GHAHREMAN Ahmad, OLVERA OLMEDO Oscar, REN Zihe
Принадлежит:

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions. 159.-.(canceled)60. A method of recovering at least one base metal from at least one base metal sulfide in a material , the method comprising:contacting the material with an acidic sulfate solution comprising a reagent having a thiocarbonyl functional group, wherein the reagent is thiosemicarbazide (TSCA), to produce a pregnant solution containing base metal ions; andrecovering the at least one base metal from the pregnant solution.61. The method of claim 60 , wherein the acidic sulfate solution further comprises ferric sulfate.62. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 30 mM.63. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 20 mM.64. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 10 mM.65. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 5 mM.66. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 4 mM.67. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 3 mM.68. The method of claim 60 , wherein the concentration of the reagent in the acidic ...

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Номер записи: 57
11-06-2020 дата публикации

Process for Leaching Metal Sulfides with Reagents Having Thiocarbonyl Functional Groups

Номер: US20200181735A1
Автор: ASSELIN Edouard, Dixon David, GHAHREMAN Ahmad, OLVERA OLMEDO Oscar, REN Zihe
Принадлежит:

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions. 159.-. (canceled)60. A method of recovering at least one metal from an ore containing at least one metal sulfide , the method comprising:contacting the ore with an acidic sulfate solution comprising ferric sulfate and formamidine disulfide (FDS) to produce a pregnant solution containing metal ions; andrecovering the at least one metal from the pregnant solution,wherein the at least one metal includes:copper, wherein the at least one metal sulfide includes chalcopyrite, covellite, bornite, enargite, a copper sulfide of the formula CuxSy wherein the x:y ratio is between 1 and 2, or a combination thereof;cadmium, wherein the at least one metal sulfide is greenockite;nickel, wherein the at least one metal sulfide is pentlandite, violarite, or a combination thereof;or a combination thereof.61. The method of claim 60 , wherein the concentration of FDS in the acidic sulfate solution is in the range of about 0.1 mM to about 15 mM.62. The method of claim 60 , wherein the concentration of FDS in the acidic sulfate solution is in the range of about 0.1 mM to about 10 mM.63. The method of claim 60 , wherein the concentration of FDS in the acidic sulfate solution is in the range of about 0.2 mM to about 5 mM.64. The method of claim 60 , wherein the concentration of FDS in the acidic sulfate solution is in the range of about 0.1 mM to about 2.5 mM.65. The method of claim 60 , wherein the concentration of FDS in the acidic sulfate solution is in the range of about 0.1 mM to about 2 mM.66. The ...

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Номер записи: 58
11-06-2020 дата публикации

Process for Leaching Metal Sulfides with Reagents Having Thiocarbonyl Functional Groups

Номер: US20200181736A1
Автор: ASSELIN Edouard, Dixon David, GHAHREMAN Ahmad, OLVERA OLMEDO Oscar, REN Zihe
Принадлежит:

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions. 159.-. (canceled)60. A method of recovering at least one metal from an ore containing at least one metal sulfide , the method comprising:contacting the ore with an acidic sulfate solution containing ferric sulfate and a reagent having a thiocarbonyl functional group to extract metal ions from the at least one metal sulfide, wherein the concentration of the reagent in the acidic sulfate solution is sufficient to increase the rate of the metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions; andrecovering the at least one metal from the pregnant solution,wherein the at least one metal includes:copper, wherein the at least one metal sulfide includes chalcopyrite, covellite, bornite, enargite, a copper sulfide of the formula CuxSy wherein the x:y ratio is between 1 and 2, or a combination thereof;cadmium, wherein the at least one metal sulfide is greenockite;nickel, wherein the at least one metal sulfide is pentlandite, violarite, or a combination thereof; or a combination thereof.61. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 30 mM.62. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of about 0.2 mM to about 20 mM.63. The method of claim 60 , wherein the concentration of the reagent in the acidic sulfate solution is in the range of ...

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Номер записи: 59
11-06-2020 дата публикации

Process for Leaching Metal Sulfides with Reagents Having Thiocarbonyl Functional Groups

Номер: US20200181737A1
Автор: Ahmad GHAHREMAN, David Dixon, Edouard ASSELIN, Oscar OLVERA OLMEDO, Zihe REN
Принадлежит: University of British Columbia

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.

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Номер записи: 60
14-07-2016 дата публикации

ACTIVATED SEMICONDUCTOR COMPOUNDS HAVING INCREASED ELECTROCHEMICAL REACTIVITY AND ASSOCIATED METHODS THEREOF

Номер: US20160201162A1
Автор: Chaiko David J., Rocks Sara (Sally)
Принадлежит:

Disclosed are novel compounds which display enhanced reactive properties due, in part, to induced lattice strain. The new compounds demonstrate accelerated leaching of copper under oxidizing conditions. The activated compounds are produced under conditions of time, temperature, Eh, and pH which retard the rate of lattice strain relaxation. Further disclosed are methods of making and using the novel compounds. 2. A compound according to claim 1 , wherein x is 1.2 claim 1 , and y is 7.2.3. A compound according to claim 1 , wherein x is 1.4 claim 1 , and y is 7.4.4. A composition comprising the compound defined in .5. A method of making the compound defined in claim 1 , comprising synthesizing the compound defined in .6. The method according to claim 5 , wherein the synthesizing is performed using a stirred-media reactor.7. The method according to claim 5 , wherein the synthesizing is performed in the presence of copper sulfate.8. The method according to claim 5 , wherein the synthesizing is performed at a pH between about 1.0 and about 6.0.9. The method according to claim 5 , wherein the synthesizing is performed at a temperature between about 60° C. and about 100° C.10. The method according to claim 5 , wherein the synthesizing is performed at a redox potential between about 200 mV vs. SHE and about 600 mV vs. SHE.11. The method according to claim 5 , wherein the synthesizing is performed for a time between about 1 minute and about 60 minutes.12. A method of recovering copper comprising the step of oxidatively leaching the compound defined in claim 1 , in the presence of an acidic ferric sulfate lixivant.13. The method of recovering copper according to claim 12 , wherein the step of oxidatively leaching is performed under mechano-chemical reaction conditions.14. The method of recovering copper according to claim 12 , wherein the step of oxidatively leaching is performed using a stirred-media reactor. This application claims priority to and the benefit of, or relates ...

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Номер записи: 61
30-07-2015 дата публикации

METHOD AND PROCESS FOR THE ENHANCED LEACHING OF COPPER SULFIDE MINERALS CONTAINING CHALCOPYRITE

Номер: US20150211092A1
Автор: Chaiko David J.
Принадлежит:

A method of leaching a copper bearing sulfide mineral slurry containing chalcopyrite is described. The method comprises the steps of providing a slurry having chalcopyrite particles therein, exposing the slurry to an acidic leach solution, and chemically leaching copper from the slurry into the acidic leach solution in the presence of microwave irradiation. The microwave irradiation of the slurry takes place under process conditions whereby crystalline pyrite may be formed in-situ on surfaces of the chalcopyrite particles. Crystalline pyrite may be formed on surfaces of the chalcopyrite particles from amorphous phase pyrite. Leached copper is recovered from said acidic leach solution. A device for more efficiently leaching a copper bearing sulfide mineral slurry containing chalcopyrite is also described herein. 1. A method of leaching a copper-bearing sulfide mineral slurry , comprising the steps of:(a) providing a slurry having copper sulfide particles therein;(b) exposing the slurry to an acidic leach solution;(c) chemically leaching copper from the slurry into the acidic leach solution in the presence of microwave irradiation, under conditions whereby crystalline pyrite can be formed in-situ, on surfaces of the copper sulfide particles;(d) generating microwaves at a predetermined frequency or intensity that is configured for forming crystalline pyrite on surfaces of the copper sulfide particles in-situ; and(d) recovering leached copper from said acidic leach solution.2. The method of claim 1 , wherein step (c) is further performed under conditions whereby elemental sulfur (which may form surface passivation layer(s) on the copper sulfide particles as a result of exposure to the acidic leach solution) claim 1 , is prevented from entering a plasma phase.3. The method of claim 2 , further comprising forming crystalline pyrite on surfaces of the copper sulfide particles in-situ and/or converting amorphous pyrite to crystalline pyrite.4. The method of claim 1 , ...

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Номер записи: 62
11-08-2016 дата публикации

SYSTEMS AND METHODS FOR METAL RECOVERY

Номер: US20160230296A1
Автор: Baughman David R., Bolles Thomas R., Hazen Wayne W., May Lawrence D., Robertson Joanna M., Smith Jay C.
Принадлежит: Freeport Minerals Corporation

Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, and leaching the roasted metal bearing material in a basic medium to yield a pregnant leach solution. 1. (canceled)2. A process comprising:roasting a metal bearing material comprising a copper carbonate under oxidizing conditions;roasting the metal bearing material under reducing conditions, at a temperature of about 475° C. or greater; andleaching the metal bearing material in a basic medium to yield a pregnant leach solution.3. The process of claim 2 , wherein the basic medium comprises at least one of ammonia claim 2 , ammonium carbonate and ammonium sulfate.4. The process of claim 2 , wherein the oxidizing conditions comprise an oxygen gas containing atmosphere.5. The process of claim 2 , wherein the reducing conditions comprise a hydrogen gas containing atmosphere.6. The process of claim 2 , further comprising subjecting the pregnant leach solution to a solution extraction process to yield a loaded aqueous stream.7. The process of claim 6 , wherein an extraction stage of the solution extraction yields a cobalt-bearing raffinate.8. The process of claim 7 , further comprising precipitating cobalt from the cobalt-bearing raffinate.9. The process of claim 8 , wherein the precipitating yields cobalt sulfide.10. The process of claim 9 , wherein the cobalt sulfide is subjected to leaching.11. The process of claim 6 , subjecting the loaded aqueous stream to electrowinning.12. The process of claim 2 , wherein the copper carbonate comprises at least one of azurite and malachite.13. A process comprising:oxidizing a metal bearing material comprising a copper carbonate to produce an oxidized metal bearing material;reducing the oxidized metal bearing material at a temperature of about 475° C. or greater to produce a ...

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Номер записи: 63
09-07-2020 дата публикации

Method for separating copper from nickel and cobalt

Номер: US20200216327A1
Автор: Hiroshi Kobayashi, Hiroshi Takenouchi, Satoshi Asano, Tatsuya Higaki
Принадлежит: SUMITOMO METAL MINING CO LTD

Provided is a method for separating copper from nickel and cobalt with which it is possible to selectively and efficiently separate copper, as well as nickel and cobalt, from an alloy including copper, nickel, and cobalt such as an alloy having high corrosion resistance that includes copper, nickel, and cobalt obtained by dry treatment of waste lithium ion cells. An alloy including copper, nickel, and cobalt is brought into contact with sulfuric acid in the joint presence of a sulfurizing agent, and a solid containing copper and a leachate containing nickel and cobalt are obtained.

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Номер записи: 64
26-08-2021 дата публикации

OPTIMIZED BIOPROCESSING METHOD

Номер: US20210262059A1
Автор: Crundwell Frank Kenneth, Megaw Darren Craig
Принадлежит:

Disclosed is method of leaching at least one desired element from feed material containing feed material fines, which includes combining such a feed material with a pulping solution comprising a liquid and a solution-hydrated or a solution-soluble polymer to form a treated slurry, with the polymer configured to predominantly capture at least part of the feed material fines prior to their settling out of the liquid slurry matrix, and with the polymer being added to the feed material in a predetermined ratio of polymer to feed material. The treated slurry is deposited in a deposition cell for leaching and further treatment. Also disclosed is a composition of a treated slurry, and treating any one or more of the feed material, the treated slurry or the deposited treated slurry with sulphide consuming bacteria. 115-. (canceled)16. A method of leaching at least one desired element from feed material containing feed material fines , the method comprising:combining a feed material that contains feed material fines with a pulping solution including a liquid and a solution-hydrated or a solution-soluble polymer to form a treated slurry, with the polymer configured to predominantly capture at least part of the feed material fines prior to the at least part of the feed material fines settling out of the liquid slurry matrix and with the polymer being added to the feed material in a predetermined ratio of polymer to feed material;depositing the treated slurry into a deposition cell to less than a predetermined maximum deposition height;allowing the majority of the liquid in the treated slurry to naturally dewater from the fines solids in the cell;applying a suitable lixiviant to the cell for a predetermined feed-solids-specific optimized time, with the lixiviant configured to leach the desired element from the cell;allowing the lixiviant to drain from the cell as a pregnant leach solution;flushing the cell with a suitable wash solution to displace entrained dissolved desired ...

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Номер записи: 65
26-08-2021 дата публикации

METHOD FOR SEPARATING COPPER FROM NICKEL AND COBALT

Номер: US20210262060A1
Автор: Higaki Tatsuya, Kobayashi Hiroshi, TAKENOUCHI Hiroshi
Принадлежит: SUMITOMO METAL MINING CO., LTD.

Provided is a method for efficiently separating copper from nickel and cobalt from a sulfide containing nickel and cobalt together with copper. The present invention is a method for separating copper from nickel and cobalt, the method comprising pulverizing a sulfide containing copper and nickel and cobalt into a predetermined size and then stirring the resultant product under the condition having an oxidation-reduction potential (a reference electrode: a silver/silver chloride electrode) of less than 100 mV using an acid solution to perform a leaching treatment. In this separation method, a leach liquor in which nickel and cobalt are leached and a leach residue containing copper sulfate are produced as the result of the leaching treatment. 1. A method for separating copper from nickel and cobalt , wherein a sulfide comprising copper , nickel and cobalt is pulverized to a predetermined size , and the pulverized sulfide is subjected to a leaching treatment by stirring the pulverized sulfide in an acid solution under a condition wherein a redox potential (reference electrode: silver/silver chloride electrode) is less than 100 mV.2. The method for separating copper from nickel and cobalt according to claim 1 , wherein the leaching treatment produces a leachate in which nickel and cobalt are leached claim 1 , and a leach residue comprising copper sulfide.3. The method for separating copper from nickel and cobalt according to claim 1 , wherein the sulfide is pulverized so as to have a particle size of 150 μm or less as a D90 value.4. The method for separating copper from nickel and cobalt according to claim 1 , wherein the leaching treatment is performed at an acid solution temperature in a range of 60° C. or more and less than 100° C.5. The method for separating copper from nickel and cobalt according to claim 1 , wherein a hydrochloric acid solution or a sulfuric acid solution is used as the acid solution.6. The method for separating copper from nickel and cobalt ...

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Номер записи: 66
24-08-2017 дата публикации

SOLVENT EXTRACTION AND STRIPPING SYSTEM

Номер: US20170241028A1
Автор: Ernt William Daniel, Galik George M.
Принадлежит:

An apparatus for separating a mixture of two liquids of different densities which liquids are substantially insoluble in one another includes a hollow permeable body having a recess for receiving a first fluid which can flow from the recess through the permeable body to an exterior of the permeable body. A housing surrounds and is spaced from the exterior of the permeable body. The housing has an inlet for a second fluid and an outlet for a mixture of the first and second fluid. A baffle or baffles are provided in the space between the exterior of the permeable body and the housing, and to define a mixing channel in space between the exterior of the permeable body and the housing so that the second fluid can enter the housing inlet and flow through the mixing channel to the outlet, while picking up fluid on the exterior of the permeable body. 1. An apparatus for mixing of two liquids of different densities which liquids are substantially insoluble in one another , said apparatus comprising:a first mixing vessel in the form of an elongate cylindrical housing having a first fluid inlet for introduction of a first fluid adjacent a first end, and a fluid outlet adjacent a second end, said first mixing vessel including a permeable body in the form of a cylindrical tube coaxially disposed within and spaced from an interior wall of said cylindrical housing, said permeable body having a second fluid inlet for a second fluid adjacent said first end and being closed adjacent said second end, said permeable body being at least partially filled with loosely packed finely divided media or frits, and having a baffle or baffles in the space between the exterior of the permeable body and an interior wall of the housing, the baffle or baffles being spaced to define a mixing channel through the space between the exterior of the permeable body and the interior wall of the housing so that the first fluid can enter the housing inlet and flow through the mixing channel to the outlet, ...

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Номер записи: 67
23-07-2020 дата публикации

METHOD FOR SEPARATING COPPER, NICKEL, AND COBALT

Номер: US20200232066A1
Автор: Asano Satoshi, Higaki Tatsuya, Kobayashi Hiroshi, TAKENOUCHI Hiroshi
Принадлежит:

Provided is a method for separating copper, nickel, and cobalt, the method being capable of efficiently and selectively separating copper, nickel, and cobalt from alloys containing copper, nickel, and cobalt, such as highly corrosive alloys containing copper, nickel, and cobalt obtained by dry-processing used lithium ion batteries. The alloy containing copper, nickel, and cobalt is brought into contact with nitric acid in the co-presence of a sulfiding agent to obtain a solid containing copper and a leachate containing nickel and cobalt. 1. A method for separating copper from nickel and cobalt ,wherein an alloy containing copper, nickel, and cobalt is brought into contact with a nitric acid in a joint presence of a sulfurizing agent, and a solid containing copper and a leachate containing nickel and cobalt are obtained.2. The method for separating copper from nickel and cobalt according to claim 1 ,wherein the sulfurizing agent is one or more types selected from sulfur, hydrogen sulfide gas, sodium hydrogen sulfide, and sodium sulfide.3. The method for separating copper from nickel and cobalt according to claim 1 ,wherein the nitric acid and the sulfurizing agent are simultaneously brought into contact with the alloy containing copper, nickel, and cobalt, or the sulfurizing agent is brought into contact with the alloy, and then, the nitric acid is brought into contact with the alloy.4. The method for separating copper from nickel and cobalt according to claim 1 ,wherein the alloy containing copper, nickel, and cobalt is an alloy that is obtained by heating and melting, and reducing scrap of a lithium ion cell.5. The method for separating copper from nickel and cobalt according to claim 1 ,wherein the alloy containing copper, nickel, and cobalt is a powder material, and a particle diameter of the alloy containing copper, nickel, and cobalt is less than or equal to 300 μm.6. The method for separating copper from nickel and cobalt according to claim 1 ,wherein the ...

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Номер записи: 68
09-09-2021 дата публикации

Recovery of critical metals from sx-ew copper raffinate and other solutions derived from leaching ores with sulfuric acid

Номер: US20210277497A1
Автор: Willem P.C. Duyvesteyn
Принадлежит: Scandium International Mining Corp

A method for extracting secondary metal values from a sulfuric acid leachate is provided. The method includes providing a leachate which contains a primary metal and a plurality of secondary metals, wherein the primary metal is selected from the group consisting of Cu, Li and Ni and is derived from sulfuric acid leaching of an ore; passing the leachate through a first ion exchange resin which is selective to, and releasably binds, the plurality of secondary metals; stripping the plurality of secondary metals from the second or third ion exchange resins, thereby obtaining a first extract; and recovering the secondary metals from the first extract. In some embodiments, prior to passing the leachate through the first ion exchange resin, the leachate is passed through a second ion exchange resin which is selective to, and releasably binds, one of the plurality of secondary metals. The one of the secondary metals is then stripped from the second exchange resin, thereby obtaining a second extract, and the one of the secondary metals is recovered from the second extract.

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Номер записи: 69
08-09-2016 дата публикации

Heap Leaching of Copper

Номер: US20160258036A1
Автор: Rautenbach George Frederick
Принадлежит:

A method of leaching copper from a heap of ore that includes at least one resting step followed by an irrigation step, wherein, during the irrigation step a leach solution that contains chloride ions is applied to the ore at a higher rate than during the resting step. 120.-. (canceled)21. A method of leaching copper from a heap of ore comprising at least one resting step followed by an irrigation step , wherein during the irrigation step a leach solution that contains chloride ions is applied to the ore at a higher rate than during the resting step and during the irrigation step a chloride ion concentration of the leach solution is between 100 g/l and 190 g/l , wherein the resting step has a duration of at least 20 hours.22. The method according to wherein claim 21 , during the resting step claim 21 , no leach solution is applied to the ore.23. The method according to wherein claim 21 , during the irrigation step claim 21 , the leach solution has a sulphuric acid concentration of between 4 g/l and 100 g/l.24. The method according to wherein claim 21 , during or after the irrigation step claim 21 , copper is recovered from a solution drained from the heap by a solvent extraction step with at least one copper-loaded organic washing stage to promote an electrolyte chloride ion concentration below 50 ppm.25. The method according to wherein a first resting step occurs after construction of the heap from agglomerated ore.26. The method according to wherein the irrigation step is continuous.27. The method according to wherein claim 21 , in the resting step claim 21 , the chloride ion concentration of the leach solution contacting the ore is between 100 g/l and 190 g/l.28. The method according to wherein claim 21 , in the resting step claim 21 , the leach solution contacting the ore contains at least 0.5 g/l of soluble copper.29. The method according to wherein the resting step has a duration of up to 50 days to enhance dissolution of the ore.30. The method according to ...

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Номер записи: 70
15-08-2019 дата публикации

RENEWABLE ISOPARAFFINS AS DILUENT IN HYDROMETALLURGICAL LIQUID-LIQUID EXTRACTION PROCESS

Номер: US20190249273A1
Автор: KORTELAINEN Jukka, Paatero Erkki, RÄMÖ Virpi, ROUHIAINEN Maija, Saario Rami
Принадлежит:

The present disclosure relates to hydrometallurgical technologies wherein liquid-liquid extraction, also called solvent extraction, is used to separate and concentrate metal ions. Exemplary embodiments relate to solvent extraction of copper and a diluent useful in copper solvent extraction. A bio-based composition can fulfil physico-chemical properties that are desired for solvent extraction. Moreover, a composition is disclosed, which in addition to providing more environmental friendly alternative, can also improve the solvent extraction process of copper. 1. A biobased composition for liquid-liquid extraction of metals , the biobased composition comprising:5-40 vol-% metal extraction reagent; and60-95 vol % diluent, wherein the diluent includes:10%-100 wt % first organic diluent containing hydrocarbons having 80-98 wt % C15-C20 hydrocarbons with at least 60 wt % isoparaffins from a total amount of the hydrocarbons; andoptionally, 0-90 wt % second organic diluent component having naphthenes more than 10 wt %.2. The composition of claim 1 , wherein the first organic diluent comprises:0 wt %-5 wt % naphthenes, and 100-95 wt % paraffins.3. The composition of claim 1 , wherein a 14C isotope content of the first organic diluent is more than 90%.4. The composition of claim 2 , wherein the first organic diluent comprises:paraffins, wherein of the total paraffins 5-15 wt % is C15, 10-35 wt % is C16, 10-30 wt % is C17, 25-45 wt % is C18, more than 0-5 wt % is C19 and more than 0-5 wt % is C20.5. The composition of claim 1 , wherein a total amount of isoparaffins in the first organic diluent is at least 85 wt % claim 1 , 90 wt % claim 1 , 93 wt % and 95 wt %.6. The composition of claim 1 , wherein the first organic diluent comprises:C15 hydrocarbons having 5 wt %-20 wt % n-paraffins and 80 wt %-95 wt % i-paraffins;C16 hydrocarbons having 0.5 wt %-15 wt % n-paraffins and 85 wt %-99.5 wt % i-paraffins;C17 hydrocarbons having 3 wt %-15 wt % n-paraffins and 85 wt %-97 wt % i- ...

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Номер записи: 71
13-09-2018 дата публикации

EWS MODULE DEVICE FOR ELECTRO-WINNING AND/OR ELECTRO-REFINING, INTERCONNECTION PROCESS, AND OPERATING PROCESS THEREOF

Номер: US20180258545A1
Автор: GODOY MELO Paulina Alejandra, GODOY OLGUÍN Orlando Enrique
Принадлежит:

The invention relates to an EWS module device for electro-winning and/or electro-refining, based on a saturated leaching solution of PLS/electrolyte/raffmate/ILS without solvent extraction, characterised by comprising: a tank ( and ); a set of electrolytic cells contained within the tank, wherein the cells are electrically and volumetrically separated by the internal walls of the module (), with the cells being connected in series by a joining board or capping board (); an intercellular bar (); an intercellular bar guide (); inlet and outlet ducts for the PLS/electrolyte/raffinate/ILS () and () for each cell independently; and each EWS module is in turn connected to the other modules by an inter-module connector (), and same in turn control the connection and disconnection of the EWS modules by an interrupter (); operating process of the EWS module device; and connection and disconnection process between different EWS module devices. 1101215143121711181825. An EWS module device for electrowinning and/or electrorefining , based on a pregnant leach solution (PLS) without extraction by solvents , comprising: a tank ( and ); a group of electrolytic cells () contained within the tank , where the cells are separated electrically and volumetrically by internal walls of the EWS module device () and the cells are connected in series by a capping board (); an intercell bar (); an intercell guide bar (); entry and exit ducts for a mixed solution of PLS/Electrolyte/Raffinate/intermediate leach solution (ILS) () and () for each cell independently; and an intermodule connector () for interconnecting the EWS module device to another EWS module device , where the intermodule connector () regulates the connection and disconnection of the EWS module device via a continuous current switch ().214. The EWS module device of claim 1 , wherein the tank is separated internally and hermetically through the internal walls of the EWS module device () where the number of internal walls is ...

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Номер записи: 72
22-09-2016 дата публикации

FLOTATION REAGENTS AND FLOTATION PROCESSES UTILIZING SAME

Номер: US20160271624A1
Автор: BHAMBHANI Tarun, CHEN Haunn-Lin Tony, Deo Puspendu, NAGARAJ Devarayasamudram Ramachandran, VASUDEVAN Mukund
Принадлежит: CYTEC TECHNOLOGY CORP.

Methods of enhancing recovery of value sulfide or precious minerals from an ore containing Mg-silicate, slime forming minerals, and/or clay by subjecting the ore to a flotation process performed under acidic conditions, in conjunction with the addition of a froth phase modifier agent to the ore, are provided herein. 2. A method according to claim 1 , wherein the polymer further comprises one or more hydrophobic group selected from the group consisting of aromatic hydrocarbons; C-Chydrocarbons; alkyl or aryl esters; and alkyl or aryl ethers.3. A method according to claim 2 , wherein said ester is one or more member selected from the group consisting of: vinyl acetate claim 2 , vinyl formate claim 2 , vinyl propionate claim 2 , vinyl butyrate claim 2 , and vinyl isobutyrate.4. A method according to claim 2 , wherein said alkyl ether is one or more member selected from the group consisting of: butyl vinyl ether claim 2 , ethyl vinyl ether claim 2 , and methyl vinyl ether.5. A method according to claim 2 , wherein the C-Chydrocarbon is selected from the group consisting of N-hexyl acrylamide; N-propyl acrylamide; and N claim 2 ,N-dipropyl acrylamide.6. A method according to claim 1 , wherein the froth phase modifier is a polymer selected from the group consisting ofpoly(styrene-co-maleic anhydride-co-2-acrylamido-2-methyl-1-propanesulfonic acid),poly(allyl sulfonate-co-maleic anhydride),hydroxamated poly(acrylamide-co-vinylphosphonic acid),poly(acrylic acid-co-vinylphosphonic acid),poly(2-acrylamido-2-methyl-1-propanesulfonic acid-co-vinylphosphonic acid),silane- and tert-octylamine modified poly(N-vinylpyrrolidone-co-maleic anhydride),3-aminopropyltriethoxysilane modified poly(styrene-co-maleic anhydride),3-aminopropyltriethoxysilane modified poly(styrene-co-maleic anhydride-co-acrylic acid),hydroxamated poly(acrylamide-co-2-acrylamido-2-methyl-1-propanesulfonic acid),and combinations thereof.7. A method according to claim 1 , wherein said froth phase modifier is added ...

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Номер записи: 73
28-09-2017 дата публикации

SYSTEM AND METHOD FOR CONTROLLING FROTHING DURING ATMOSPHERIC LEACHING OF METAL SULPHIDES USING SILICATES

Номер: US20170275177A1
Автор: Baczek Frank, Chaiko David J., Eyzaguirre Carlos, Rocks Sarah (Sally), Roy Gary, Walters Tom
Принадлежит:

A method of controlling frothing during atmospheric or substantially atmospheric leaching of a metal sulfide is disclosed. In some embodiments, the method may comprise the steps of (a) producing a metal sulfide concentrate via flotation; (b) producing a tailings stream via flotation; and, (c) diverting a portion or all of said produced tailings stream to an atmospheric or substantially atmospheric sulfide leach circuit. A metal recovery flowsheet is also disclosed. In some embodiments, the metal recovery flowsheet may comprise a unit operation comprising: (a) a sulfide concentrator comprising a flotation circuit, the flotation circuit producing a metal sulfide concentrate stream, and a tailings stream; and, (b) an atmospheric or substantially atmospheric metal sulfide leach circuit. The sulfide concentrator may be operatively connected to the atmospheric or substantially atmospheric metal sulfide leach circuit via both of said metal sulfide concentrate stream, and said tailings stream. 1. A method of controlling frothing during atmospheric or substantially atmospheric leaching of a metal sulfide , the method comprising:(a) producing a metal sulfide concentrate via flotation;(b) producing a tailings stream via flotation; and,{'sup': 'o', '(c) diverting a portion of said produced tailings stream to an atmospheric or substantially atmospheric sulfide leach circuit being fed with said metal sulfide concentrate; wherein the atmospheric or substantially atmospheric sulfide leach circuit is maintained at a temperature which is below the melting point of elemental sulfur (S).'}2. The method of claim 1 , wherein the step of diverting a portion of said produced tailings stream to an atmospheric or substantially atmospheric sulfide leach circuit comprises the step of dosing at least one leach reactor and/or at least one attrition scrubber provided within the atmospheric or substantially atmospheric sulfide leach circuit.3. The method of claim 2 , wherein the tailings stream ...

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Номер записи: 74
27-08-2020 дата публикации

METHOD FOR RECYCLING COPPER INDIUM GALLIUM SELENIUM MATERIALS

Номер: US20200270724A1
Автор: Gao Yongtao, LIU Junfei, Peng Kan, Wang Guan, Wu Guofa
Принадлежит: Hanergy New Material Technology Co., Ltd

A method for recycling copper indium gallium selenium materials comprises the steps of sulphating roasting, acid dissolution, extraction and electrolysis of metal copper, production of a gallium hydroxide deposition, replacement of indium, and the like. In the method, deselenization is carried by using sulphating roasting, and residues after roasting are oxidizing slags capable of being directly subjected to acid dissolution, thereby reducing acid gas pollution; in addition, copper is extracted by using a copper extractant, the separation effect is good and costs are low, the extracted copper can be directly electrolyzed, so as to obtain high-purity metal copper; and in another aspect, in the method, alkali separation of gallium is carried out, separation between indium and gallium can be implemented by merely adjusting the pH of a solution, thereby resolving the problem of co-extraction in the extraction of indium and gallium and the separation between indium and gallium, the separation effect is good, the purities of obtained indium and gallium products are high. 1. A method for recovering copper indium gallium selenide material , including the following steps:step A, in which the copper indium gallium selenide material is placed in a ball mill for ball milling;step B, in which the powders obtained in step A are mixed uniformly with concentrated sulfuric acid and roasted to 750° C., followed by blowing air into the mixture; and selenium is removed by absorbing with a secondary suction filter flask;step C, in which the amount of selenium in the residue after roasting is detected, if it exceeds a predetermined value, a secondary re-roasting is performed; the final residue after roasting is directly dissolved by diluted sulfuric acid;step D, in which the dissolved mixture is filtered, followed by adding a sodium hydroxide solution to adjust the pH to 1.8 and extracting copper;step E, in which the obtained stripping solution is a copper sulfate solution, which is ...

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Номер записи: 75
04-10-2018 дата публикации

PROCESS FOR EXTRACTION OF COPPER FROM ARSENICAL COPPER SULFIDE CONCENTRATE

Номер: US20180282838A1
Автор: Beoutis Percy Ponce, Plenge Gustavo
Принадлежит:

A process for extraction of copper from an arsenical copper sulfide concentrate is provided. The process includes atmospheric oxidative leaching of a feed slurry including the arsenical copper sulfide concentrate and an acidic iron sulfate-containing leach solution, in the presence of oxygen, to produce a leach slurry including copper and arsenic dissolved into the leach solution. After dissolving the copper and arsenic, and before precipitating the arsenic dissolved during the oxidative leaching, pre-precipitation solids are recovered from the leach slurry to produce the pre-precipitation solids and a resulting pregnant leach solution including the copper and arsenic. Scorodite-containing seed is introduced to the pregnant leach solution including the copper and arsenic to induce precipitation of the arsenic dissolved during the oxidative leaching, as scorodite. Solids are recovered from the pregnant leach solution to produce the solids, including the scorodite, and an arsenic-reduced pregnant leach solution including the copper. The arsenic-reduced pregnant leach solution including the copper is subjected to solvent extraction for recovering copper and thereby producing a raffinate including sulfuric acid and iron sulfate, and at least a portion of the raffinate including the sulfuric acid and iron sulfate is recycled to the oxidative leaching. 1. A process for extraction of copper from an arsenical copper sulfide concentrate , the process comprising:atmospheric oxidative leaching of a feed slurry including the arsenical copper sulfide concentrate and an acidic iron sulfate-containing leach solution, in the presence of oxygen to produce a leach slurry including copper and arsenic dissolved into the leach solution;after dissolving the copper and arsenic, and before precipitating the arsenic dissolved during the oxidative leaching, recovering pre-precipitation solids from the leach slurry to produce the pre-precipitation solids and a resulting pregnant leach ...

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Номер записи: 76
04-10-2018 дата публикации

SOLVENT EXTRACTION AND STRIPPING SYSTEM

Номер: US20180282887A1
Автор: Ernt William Daniel, Galik George M.
Принадлежит:

An apparatus for separating a mixture of two liquids of different densities which liquids are substantially insoluble in one another includes a hollow permeable body having a recess for receiving a first fluid which can flow from the recess through the permeable body to an exterior of the permeable body. A housing surrounds and is spaced from the exterior of the permeable body. The housing has an inlet for a second fluid and an outlet for a mixture of the first and second fluid. A baffle or baffles are provided in the space between the exterior of the permeable body and the housing, and to define a mixing channel in space between the exterior of the permeable body and the housing so that the second fluid can enter the housing inlet and flow through the mixing channel to the outlet, while picking up fluid on the exterior of the permeable body. 1. A centrifugal separator , comprising a rotatable tank in the shape of a vertical right cylinder in a housing , at least one inlet adjacent a lower end of the housing and a plurality of outlets adjacent an upper end of the housing , and wherein an upper end of the rotatable tank is provided with a plurality of vertical baffles which create a plurality of chambers in the upper end of the rotatable tank.2. The centrifugal separator as claimed in claim 1 , further including one or more additional inlets between the inlet adjacent the lower end of the housing and the outlets.3. The centrifugal separator as claimed in claim 1 , wherein the plurality of outlets adjacent the upper end of the housing have variable positions.4. The centrifugal separator as claimed in claim 1 , wherein the upper end of the rotatable tank is divided into four to eight chambers.5. The centrifugal separator as claimed in claim 1 , wherein the upper end of the rotatable tank is divided into four chambers. This application is a divisional application of U.S. patent application Ser. No. 15/051,352, entitled, “Solvent Extraction and Stripping System” filed ...

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Номер записи: 77
13-10-2016 дата публикации

Recovery of Copper from Copper-Containing Sulfide Ores

Номер: US20160298248A1
Автор: Hymer Timothy Roy
Принадлежит:

A process for recovering copper from copper sulfide minerals, the method comprising the steps of leaching copper sulfide minerals with an aqueous solution of ammonium chloride containing cupric chloride at a temperature of between about 40° C. and about 95° C. at atmospheric pressure, to produce a solution of cuprous/cupric chloride. 1. A process for recovering copper from copper sulfide minerals , the method comprising the steps of:leaching copper sulfide minerals with an aqueous solution of ammonium chloride containing cupric chloride at a temperature of between about 40° C. and about 95° C. at atmospheric pressure, to produce a solution of cuprous/cupric chloride.2. The process according to claim 1 , wherein the leaching step is performed at a temperature of between about 60° C. and about 90° C.3. The process according to claim 2 , wherein the leaching step is performed at a temperature of between about 75° C. and about 85° C.4. The process according to wherein the pH of the leaching solution is between about 1 and about 10.5. The process according to wherein the pH of the leaching solution is between about 4 and about 7.6. The process according to claim 1 , wherein the copper sulfide minerals include at least one of Pb claim 1 , Zn claim 1 , Ag claim 1 , Au claim 1 , Fe claim 1 , As claim 1 , or Sb.7. The process according to claim 1 , having cupric present.8. The process according to claim 1 , having a range of NH4Cl from 50 g/l to 350 g/l.9. The process according to claim 1 , having other chlorides present such as NaCl claim 1 , KCl claim 1 , etc.10. The process according to claim 1 , using O2 or air to regenerate the cuprous to cupric.11. The process according to claim 1 , using agitated leach tanks or use in heap leaching.13. The process according to claim 1 , wherein the leaching step is performed at a temperature of between about_60° C. and about 90° C. The process according to claim 1 , wherein the leaching step is performed at a temperature of between ...

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Номер записи: 78
03-09-2020 дата публикации

RECOVERY METHOD FOR COPPER-INDIUM-GALLIUM-SELENIUM MATERIAL

Номер: US20200277685A1
Автор: Gao Yongtao, LIU Junfei, Peng Kan, Wang Guan, Wu Guofa
Принадлежит: Hanergy New Material Technology Co., Ltd.

Provided is a recovery method for a copper-indium-gallium-selenium material, mainly comprising the steps of sulfuric acid aeration leaching at a high temperature, reducing selenium with sodium sulfite, separating copper by extracting, separating indium and gallium with an alkali, replacing indium, electrolyzing gallium, etc. In the recovery method for a copper-indium-gallium-selenium material, a sulfuric acid aeration leaching means is used, thus reducing acid gas pollution; at the same time, an extraction agent for copper is used to extract copper, wherein the separating effect is good and the cost is low, and the extracted copper is directly electrolyzed so as to obtain a high-purity metal copper; moreover, an alkali is used to separate gallium, wherein realizing the separation of indium and gallium only requires the adjustment of the pH value of a solution, the separating effect is good and the obtained indium and gallium products have a relatively high purity. 1. A method for recovering copper indium gallium selenide material , comprising the following steps:step A, in which the copper indium gallium selenide waste material is placed in a ball mill for ball milling;step B, in which the copper indium gallium selenide powders are added to a sulfuric acid solution and heated to 90 to 100° C., and air is introduced into the heated solution for leaching;step C, in which sodium sulfite is added to the solution, and the solution is heated and stirred, during which sodium sulfite reacts with sulfuric acid to generate sulfur dioxide gas, which then reacts with selenic acid to produce selenium;step D, in which sodium hydroxide is added to the solution to adjust the pH to 1.2 to 2.2, followed by adding a copper extractant to extract copper ions; the extract is then subjected to a reverse extraction to give a copper sulfate solution, which is electrolyzed to give copper metal;step E, in which sodium hydroxide is added to the raffinate obtained in step D to adjust the pH to ...

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Номер записи: 79
20-10-2016 дата публикации

COPPER PROCESSING METHOD

Номер: US20160304988A1
Автор: HAWKER William, Hayes Peter, JAK Evgueni, VAUGHAN James
Принадлежит:

A method of processing a copper-containing source material is provided whereby an aqueous acidic leach solution of the copper-containing source material is formed and then contacted with a pH increasing agent to thereby cause the precipitation of a copper-containing intermediate. The copper-containing intermediate can then be collected and exposed to a high temperature treatment, such as would be encountered in smelter or converter operations. 1. A method of processing a copper-containing source material including the steps of:(a) providing an aqueous acidic leach solution of the copper-containing source material;(b) introducing a pH increasing agent into the acidic leach solution to cause the precipitation of a copper-containing intermediate; and(c) collecting the copper-containing intermediate and exposing it to a high temperature treatment, optionally transporting the copper-containing intermediate to another location prior to its exposure to the high temperature treatmentto thereby process the copper-containing source material.2. The method of wherein the copper-containing source material is a copper-containing ore claim 1 , copper smelter slag claim 1 , copper-containing tailings claim 1 , copper concentrate or a copper-containing process intermediate or waste product.3. The method of wherein the copper-containing ore is selected from a copper sulphide or copper oxide ore.4. The method of wherein the aqueous acidic leach solution is formed from an acid selected from the group consisting of sulphuric claim 1 , nitric and hydrochloric acids.5. The method of wherein the pH increasing agent is selected from the group consisting of calcium oxide claim 1 , calcium carbonate claim 1 , calcium hydroxide claim 1 , calcium ferrite claim 1 , magnesium oxide claim 1 , magnesium carbonate claim 1 , magnesium hydroxide claim 1 , sodium carbonate claim 1 , sodium hydroxide claim 1 , dolomite and materials containing one or more of these compounds.6. (canceled)7. The method of ...

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Номер записи: 80
18-10-2018 дата публикации

Low Acidity, Low Solids Pressure Oxidative Leaching of Sulphidic Feeds

Номер: US20180298466A1
Автор: Jan Tjeerd Smit, Preston Carl Holloway
Принадлежит: Sherritt International Corp

Process for recovering one or both of copper and silver from a sulphidic feed containing iron, arsenic, copper and silver by pressure oxidizing an aqueous feed slurry of the sulphidic feed in a pressure vessel to form a liquid phase containing free sulphuric acid and aqueous copper sulphate, and to precipitate arsenic as solid iron arsenic compounds. The process includes operating the pressure vessel at a sufficiently low solids content to maintain a free acid level below 30 g/L in the liquid phase, and providing sufficient heat to maintain a temperature in the pressure vessel above 200° C. Copper metal is recovered from the liquid phase and/or silver may be recovered from the solids by cyanide leaching without the need for a jarosite destruction step.

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Номер записи: 81
18-10-2018 дата публикации

SYSTEMS AND METHODS FOR IMPROVED METAL RECOVERY USING AMMONIA LEACHING

Номер: US20180298505A1
Автор: Bolles Thomas R, Gertenbach Dennis D, Robertson Joanna M
Принадлежит: Freeport Minerals Corporation

Systems and methods for basic leaching are provided. In various embodiments, a method is provided comprising leaching a slurry comprising a copper bearing material and an ammonia leach medium, adding copper powder to the slurry, separating the slurry into a pregnant leach solution and solids, and performing a solvent extraction on the pregnant leach solution to produce an loaded aqueous stream. 1. (canceled)2. A method comprising:leaching a slurry comprising a metal bearing material and an ammonia leach medium, wherein the metal bearing material comprises copper and cobalt;adding a reducing agent to the slurry, wherein the reducing agent comprises a copper powder, and wherein the reducing agent is added to the slurry such that a stoichiometric ratio of copper to cobalt is greater than 0.5; andseparating the slurry into a pregnant leach solution and solids; and performing a solvent extraction on the pregnant leach solution to produce a loaded aqueous stream.3. The method of claim 2 , wherein the stoichiometric ratio of copper to cobalt is between about 4 and about 12.4. The method of claim 3 , wherein the stoichiometric ratio of copper to cobalt is about 8.5. The method of claim 2 , further comprising: producing a cobalt precipitate from a raffinate produced by the solvent extraction; and subjecting the cobalt precipitate to a metal recovery process.6. The method of claim 5 , further comprising adding ammonium hydrosulfide to the raffinate produced by the solvent extraction.7. The method of claim 2 , subjecting the loaded aqueous stream to electrowinning.8. The method of claim 2 , further comprising wet grinding the metal bearing material prior to the leaching.9. The method of claim 2 , further comprising adding sulfur dioxide gas to the slurry.10. The method of claim 9 , further comprising adding air to the slurry.11. The method of claim 2 , wherein the solvent extraction comprises subjecting the pregnant leach solution to a copper specific extracting reagent.12. ...

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Номер записи: 82
26-10-2017 дата публикации

HYDROMETALLURGICAL PROCESS FOR THE RECOVERY OF COPPER, LEAD OR ZINC

Номер: US20170306442A1
Автор: Almaguer Guzman Isaias, Benavides Pérez Ricardo, Vazquez Vazquez David Ezequiel
Принадлежит:

A hydrometallurgical process for the treatment of polymetallic ores and sulphide concentrates of copper and zinc, and by-products of lead and zinc from smelting plants, treated independently and/or as mixtures thereof, which contain relevant amounts of lead, copper, zinc, iron, gold and silver, such as the matte-speiss mixture of lead foundries, and copper cements from the purification processes of electrolytic zinc plants. Thee process allows the recovery of metallic copper, zinc, copper as copper and zinc basic salts, which may be hydroxides, carbonates, hidroxysulphates or mixtures thereof; the production of stable arsenic residues; and the effective and efficient recovery of Pb, Au and Ag as a concentrate of lead sulphide and/or lead, Au, and Ag sulphate. 1. A hydrometallurgical process for the treatment of polymetallic ores and sulphide concentrates of copper and zinc , and by-products from lead and zinc smelting plants , treated independently and/or as mixtures thereof , which contain relevant amounts of lead , copper , zinc , iron , gold and silver , such as the matte-speiss mixture of lead foundries , and copper cements from the purification processes of electrolytic zinc plants , whereby said hydrometallurgical process is characterised by the following stages:1. Grinding2. Leaching3. Purification of the iron and arsenic leaching solution4. Recovery of gold and silver valuables5. Precipitation of basic salts6. Purification of the magnesium sulphate or sodium sulphate solution7. Water recovery8. Crystallisation of the magnesium sulphate or sodium sulphate salt2. The hydrometallurgical process according to claim 1 , characterised in that the material resulting from the grinding stage has a particle size of less than 44 microns.3. The hydrometallurgical process according to claim 1 , characterised in that the leaching takes place in a solid-gas-liquid (SGL) reactor at low pressure (less than 25 psia) with oxygen.4. The hydrometallurgical process according to ...

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Номер записи: 83
19-11-2015 дата публикации

HYDROMETALLURGICAL METHOD FOR THE REMOVAL OF RADIONUCLIDES FROM RADIOACTIVE COPPER CONCENTRATES

Номер: US20150329938A1
Автор: BARTSCH Peter John, DUNN Grenvil Marquis, SAICH Stuart
Принадлежит:

A hydro-metallurgical method for the removal of uranium, thorium, radium, lead, bismuth and polonium and/or other radionuclides from a radioactive copper concentrate to produce an upgraded copper concentrate having lowered emission levels. The method comprises the step of: subjecting the copper concentrate to an acidic leaching process (NONOX leach) using a sulfate and chloride containing lixiviant under electrochemically controlled conditions, to allow at least partial removal of one or more of the radionuclides to produce the lowered emission upgraded copper concentrate, wherein the leaching process is conducted at elevated temperature and under pressure to suppress boiling in the leaching process.

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Номер записи: 84
09-11-2017 дата публикации

ELECTROWINNING CIRCUIT AND METHOD FOR GATHERING OF METAL OF INTEREST BY AN IONIC EXCHANGE INTERFACE

Номер: US20170321336A1
Автор: AMIGO JIMENEZ Mauricio, AMIGO PALACIOS Mauricio Andres
Принадлежит:

A metallurgical method for operating an autogenous production circuit for producing metal(s), said method using one or more oxidizing agents generated electrolytically in a cell with one or more interfaces which allows anion exchange; said method comprising steps of: (a) leaching of mineral(s) or material(s) containing at least one metal of interest (LX) in a first cell (A) to produce a pregnant leach solution () and an acid-ferrous aqueous solution (); (b) using solvent extraction process(es) or selection process(es) in a second cell (B) to concentrate said metal(s) of interest (SX) of said pregnant leach solution () to produce a rich electrolyte () and a raffinate solution (), said raffinate solution () being recycled in said first cell (A); and (c) electrowinning (EW) in a third cell (C) of said rich electrolyte () received from said second cell (B) and said acid-ferrous aqueous solution () received from said first cell (A), for producing a metal cathode () and an acid-ferric acid solution (), said acid-ferric acid solution () being recycled in said first cell (A), wherein said steps (a), (b) and (c) are performed in said autogenous circuit that includes said first, second and third cells (A, B, C) with one or more anionic interfaces producing anodic and cathode reactions. 1. A metallurgical method for operating an autogenous production circuit for producing metal(s) , said method using one or more oxidizing agents generated electrolytically in a cell with one or more interfaces which allows anion exchange; said method comprising steps of:{'b': 2', '8, '(a) leaching of mineral(s) or material(s) containing at least one metal of interest (LX) in a first cell (A) to produce a pregnant leach solution () and an acid-ferrous aqueous solution ();'}{'b': 2', '5', '4', '4, '(b) using solvent extraction process(es) or selection process(es) in a second cell (B) to concentrate said metal(s) of interest (SX) of said pregnant leach solution () to produce a rich electrolyte () ...

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Номер записи: 85
26-11-2015 дата публикации

HEAP LEACHING

Номер: US20150337410A1
Автор: BATCHELOR Andrew, Dimitrakis Georgios, Dodds Christopher, Goodes Christopher Geoffrey, Jones Aled, Katrib Juliano, Kingman Samuel, Palade Paula, Wellwood Grant Ashley
Принадлежит:

A heap of a material to be leached to recover a valuable metal from the material includes an electromagnetic heating system to generate heat in situ in the heap. 1. A heap of a material to be leached to recover a valuable metal from the material , the heap including an electromagnetic heating system to generate heat in situ in the heap.2. A heap of a material to be leached to recover a valuable metal from the material , the heap including an electromagnetic heating system in the form of a system for exposing the heap to electromagnetic radiation to generate heat in situ in the heap.3. The heap defined in wherein the system for exposing the heap to electromagnetic radiation is operable to selectively heat leach liquor in the heap.4. The heap defined in wherein the system for exposing the heap to electromagnetic radiation is operable to heat heap liquor to at least 50° C. claim 2 , preferably in the range between 45° C. and 65° C. claim 2 , and typically about 55° C. when the material in the heap includes sulphidic copper-containing ore with chalcopyrite as a copper-containing mineral in the ore.5. The heap defined in wherein the system for exposing the heap to electromagnetic radiation is operable to heat heap liquor to less than 85° C. when the material in the heap includes sulphidic copper-containing ore with chalcopyrite as a copper-containing mineral in the ore.6. The heap defined in wherein the electromagnetic heating system is operable to heat leach liquor and minerals containing valuable metal to a uniform temperature range throughout at least 90% of the heap.7. The heap defined in wherein the electromagnetic radiation is radio frequency radiation.8. The heap defined in wherein the electromagnetic radiation is in a lower frequency end of the radio frequency radiation band of radiation.9. The heap defined in wherein the lower frequency end of the radio frequency radiation band of radiation is 5-45 MHz.10. The heap defined in wherein in situations in which the ...

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Номер записи: 86
16-11-2017 дата публикации

DIRECT ELECTROWINNING PROCESS WITH LEACHING SOLUTION

Номер: US20170327962A1
Автор: Melo Mundaca María Angélica, Melo Paulina Godoy, Olguín Orlando Godoy
Принадлежит:

The invention relates to a process that allows electrolytic copper cathodes to be produced, using the pregnant leach solution (PLS) directly in the electrowinning, avoiding the step of mineral concentration by solvent extraction. Furthermore, this process has a modular structure and the full process can be mobilised depending on the requirements of the process itself. The invention also relates to the system that operates with the previously described process. 1. A system of electrowinning without extraction by solvents based on a pregnant leach solution (PLS) with a copper content from 5 to 30 g/L , comprising:rotary pumps of PLS, intermediate lixiviation solution (ILS), water, and reagents;a PLS accumulation tank;an emergency pool, mixed solution pool, and ILS pool;a PLS heater;a heat exchanger;modules of electrolytic cells for lixiviation with direct electrowinning (EW-LED cells);piping for feeding the PLS to the EW-LED cells; andrectifying low current transformers and instruments that permit taking a census and measuring the variables of an electrowinning process.2. The system of claim 1 , wherein the PLS heater and the heat exchanger work together where the heat exchanger claim 1 , using PLS/PLS plates claim 1 , transfers the heat energy from the PLS and a raffinate solution leaving the EW-LED cells claim 1 , towards recirculating/fresh incoming PLS claim 1 , according to a PLS recirculation cycle claim 1 , so as to power feedback the PLS in turn claim 1 , and then thermally treat the PLS once again in the heat exchanger claim 1 , using PLS/water plates operated with hot water as a heat-contributing fluid in an operation of countercurrent flows without direct contact claim 1 , as in the heat energy transfer using the PLS/PLS plates claim 1 , permitting maintaining a constant temperature of the PLS in a range between 20° C. and 60° C. upon entering the EW-LED cells.3. The system of claim 1 , wherein the PLS rotary pump claim 1 , PLS accumulation tank claim 1 , ...

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Номер записи: 87
23-11-2017 дата публикации

COPPER SULPHIDE LEACHING IN FERROUS CHLORIDE MEDIUM WITH BACTERIA

Номер: US20170335275A1
Автор: Alvarez Rodríguez Juan Carlos
Принадлежит:

A method for leaching secondary and primary sulphides of copper in a ferrous chloride medium with iron-oxidising bacteria adapted from the crushing of the mineral from the mine, includes steps of: mixing the mineral from the crushing with concentrated sulphuric acid; transporting the material mixed with sulphuric acid by means of a belt; adding a liquid leaching solution at an intermediate point during transport on the belt, the solution consisting of: iron (II) sulphate to reduce the redox potential of the solution-mineral mixture to values less than 550 mV Ag/AgCl; iron (III) sulphate; bacteria and archaea of the mesophile- and thermophile-type belonging to the genera Acidithiobacillus, Leptospirillum and Sulfulobos; and sodium chloride to produce a chlorinated environment in solutions. The method also comprises the subsequent steps of: heaping the material on heap pads; during the resting step, injecting air warmed by a liquid/air exchange system; and leaching the heaped material. 110- (canceled)11. A process for leaching secondary and primary sulfides of copper in chloride-ferrous medium with iron-oxidizing bacteria adapted from the crushing of mineral from the mine , the process comprising the steps of:mixing the mineral from the crushing with concentrated sulfuric acid at a rate of 5 kg/ton to 20 kg/ton of concentrated sulfuric acid to form a material mixed with sulfuric acid;transporting the material mixed with sulfuric acid in a belt; ferrous sulfate, to reduce the redox potential of the solution-mineral mixture at values lower than 550 mV Ag/AgCl,', 'ferric sulfate,', {'i': Acidithiobacillus, Leptospirillum', 'Sulfulobos, 'bacteria and archaea of the Mesophyll and Thermophilic type belonging to the genus and , previously adapted in an annexed plant of bioreactors, and'}, 'sodium chloride to generate the chlorinated environment in solutions;, 'adding a liquid leach solution at an intermediate point of conveyance of the belt, wherein the liquid leach solution ...

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Номер записи: 88
23-11-2017 дата публикации

Process For the Improvement of Copper Leaching Processes Using Calcium Chloride

Номер: US20170335428A1
Автор: Cortés Gustavo Tapia, Gutiérrez Abraham Backit
Принадлежит: Antofagasta Minerals S.A.

A process to significantly improve the copper chemical leaching process for primary and secondary minerals, using calcium chloride including the agglomeration, curing, and leaching with a high content of chloride, iron and copper stages. The mineral is then washed with a low concentration of copper and a high concentration of acid, where the impregnated copper is extracted from the pit and wherein a recirculated solution is used in the agglomeration stage. 1. A process to significantly decrease the leaching times of primary and secondary crushed copper minerals with a particle size between 80% under 12 mm to 80% under 3 mm wherein it is used to leach copper sulphurated minerals having a primary and/or secondary copper mineralization as chalcopyrite , bornite and covellite , wherein the process comprises:a first agglomeration process in which the agglomeration solution is a combination of sea water, saline or another type of water with recirculated solution;a second curing process in the pit after the prior agglomeration process in which the mix of sea water, saline or another type of water, calcium chloride, sulphuric acid and recirculated solution is fed at temperatures higher than 30° C. and lower than 60° C.;a third leaching process in the pit containing recirculated solution after the prior curing process in which the recirculated solution for irrigation of the stack gets in at a temperature higher than 30° C. and lower than 60° C.;a fourth washing process with refinement solution after the prior leaching process in the pit, wherein the refinement solution for irrigation of the previously treated pit with recirculated solution and previously heated at temperatures higher than 30° C., after going through the solvent extraction process also enters the stack as refinement solution at a temperature higher than 30° C. and lower than 60° C.2. A process according to claim 1 , wherein during the first agglomeration process the agglomeration solution is added at a rate ...

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Номер записи: 89
10-12-2015 дата публикации

Methods of copper extraction

Номер: US20150354025A1
Автор: Matias SAAVEDRA SALINAS
Принадлежит: Soluciones Tecnologicas Mineras Coriolis Ltda

The hydrometallurgical copper extraction processes of the present teachings generally including two steps: a conditioning or activating step using low concentrations of ammonia and ammonium in an aqueous solution; and an acid leaching step. The processes of the present teachings can be performed at low temperature, for example, at ambient temperature, and at atmospheric pressure.

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Номер записи: 90
29-10-2020 дата публикации

Recovery of copper from heap leach residues

Номер: US20200340077A1
Автор: Danilo Arrué, Hector Lizama
Принадлежит: Minera Teck Quebrada Blanca SA Cia, Teck Metals Ltd

A process for recovering copper from heap leach residues containing residual copper, includes identifying a production zone within the heap leach residues for secondary leaching, drilling wells into the heap at locations suitable for delivering leach solution into the production zone, injecting the leach solution including ferric ions through the wells and aerating the production zone to facilitate oxidative reactions within the production zone, and collecting effluent from the heap for copper recovery therefrom.

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Номер записи: 91
14-11-2019 дата публикации

Leaching Copper-Containing Ores

Номер: US20190345580A1
Автор: Brown Paul Leslie, Hackl Ralph Peter, Kittelty Daniel Arthur, Najjar Pauline Maree, Young Jason Maurice, Zonneveld Anna
Принадлежит:

A method of leaching copper-containing ores includes leaching copper-containing ores or concentrates or tailings of the ores or concentrates with a leach liquor in the presence of an additive that enhances the dissolution of copper from copper minerals in the ores and concentrates by forming a complex between (a) sulfur, that has originated from copper minerals in the ores, and (b) the additive. A method of leaching copper-containing ores includes leaching copper-containing ores or concentrates or tailings of the ores or concentrates with a leach liquor includes leaching copper-containing ores or concentrates or tailings of the ores or concentrates with a leach liquor in the presence of a nitrogen-containing organic complexing additive that forms a complex between sulfur, that has originated from copper minerals in the ores, and the additive. 1. A method of leaching copper-containing ores , such as copper-containing sulfidic ores such as sulfidic ores that contain copper minerals such as chalcopyrite and/or enargite , or concentrates of the ores or tailings of the ores or concentrates , that includes leaching copper-containing ores or concentrates or tailings of the ores or concentrates with a leach liquor in the presence of an additive that enhances the dissolution of copper from copper minerals in the ores and concentrates by forming a complex between (a) sulfur , that has originated from copper minerals in the ores , and (b) the additive.2. The method according to claim 1 , wherein the complex comprises sulfur from the copper minerals and the additive claim 1 , with the additive breaking down the passivating layer or reducing the formation of the layer and therefore allowing greater access for leaching copper from copper minerals during the method.3. The method according to claim 1 , wherein the additive comprises a nitrogen-containing complexing agent that includes at least two nitrogen atoms spaced by two carbon atoms to permit the additive to form complexes ...

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Номер записи: 92
14-11-2019 дата публикации

Leaching Copper-Containing Ores

Номер: US20190345581A1
Автор: Brown Paul Leslie, Hackl Ralph Peter, Kittelty Daniel Arthur, Najjar Pauline Maree, Young Jason Maurice, Zonneveld Anna
Принадлежит:

A method of leaching copper-containing ores includes leaching copper-containing ores or concentrates or tailings of the ores or concentrates with a leach liquor in the presence of an additive that enhances the dissolution of copper from copper minerals in the ores and concentrates by forming a complex between (a) sulfur, that has originated from copper minerals in the ores, and (b) the additive. A method of leaching copper-containing ores includes leaching copper-containing ores or concentrates or tailings of the ores or concentrates with a leach liquor includes leaching copper-containing ores or concentrates or tailings of the ores or concentrates with a leach liquor in the presence of a nitrogen-containing organic complexing additive that forms a complex between sulfur, that has originated from copper minerals in the ores, and the additive. 1. A method of leaching copper-containing ores containing chalcopyrite and/or enargite , concentrates of the ores , or tailings of the ores or the concentrates , comprising leaching the copper-containing ores containing chalcopyrite and/or enargite , the concentrates of the ores , or the tailings of the ores or the concentrates with a leach liquor in the presence of an additive that enhances dissolution of copper from copper minerals in the ores and the concentrates by forming a complex between (a) sulfur , that has originated from copper minerals in the ores , and (b) the additive , wherein the concentration of the additive is up to 10 g/L in the leach liquor , and wherein leaching includes controlling the pH of the leach liquor to be less than 2.5.2. The method according to claim 1 , wherein the complex comprises sulfur from the copper minerals and the additive claim 1 , with the additive breaking down a passivating layer or reducing a formation of a passivating layer and therefore increasing access for leaching copper from copper minerals during the method.3. The method according to claim 1 , wherein the additive comprises a ...

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Номер записи: 93
21-11-2019 дата публикации

METHOD AND SYSTEM FOR COMPREHENSIVE RECOVERY AND UTILIZATION OF COPPER-NICKEL SULFIDE ORE

Номер: US20190352740A1
Автор: Chen Xingyu, Li Jiangtao, Li Yongli, LIU Xuheng, XIAO Wanhai, ZHAO Zhongwei
Принадлежит: CENTRAL SOUTH UNIVERSITY

The present invention relates to the field of ore smelting technology, and particularly provides a method and system for comprehensive recovery and utilization of copper-nickel sulfide ore. Under normal pressure, the method can be used to directly leach copper-nickel sulfide ore concentrate or low-grade nickel matte obtained by matte smelting of copper-nickel sulfide ore. In the leaching process, the leaching rate of nickel, cobalt and iron is up to 99% or more, and copper is hardly leached, whereby the deep separation of copper from elements such as nickel and cobalt is directly realized, and the huge system for copper-nickel separation in the conventional process is omitted. Moreover, noble metals are not leached, and almost all of them remain in the leaching slag with copper, so the destiny is simple. 1. A method for comprehensive recovery and utilization of copper-nickel sulfide ore , comprising the following steps:1) selective leaching, comprising:obtaining a nickel-iron-cobalt-enriched leachate and a copper-enriched leaching slag by selective leaching, whereinthe selective leaching is a method for recovering the main accompanying elements from copper-nickel sulfide ore, which comprises the following selective leaching steps:selectively leaching by continuously adding low-grade nickel matte obtained by matte smelting of copper-nickel sulfide ore and a leaching reaction solution to a reaction base liquid, and collecting gaseous hydrogen sulfide, a first leachate, and a first leaching slag respectively, wherein the reaction base liquid is a 20-60 wt % sulfuric acid solution, and the leaching reaction solution is a 60-95 wt % sulfuric acid solution; and adding water to dissolve the first leaching slag, and collecting a second leachate and a second leaching slag respectively,wherein the second leachate is a nickel-iron-cobalt-enriched leachate; and the second leaching slag is a copper-enriched leaching slag;2) removing iron from the nickel-iron-cobalt-enriched ...

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Номер записи: 94
20-12-2018 дата публикации

METHOD OF COPPER CONCENTRATE SULFATION AND LEACHING

Номер: US20180363099A1
Автор: Jalbout Abraham Fouad
Принадлежит:

The method of recovering copper from sulfide ores with copper and iron, comprises the steps of reacting, in a reaction vessel, a copper-containing sulfide ore with sulfur dioxide gas to form elemental sulfur, an iron oxide and a copper sulfide, separating the solids comprising the iron oxide and copper sulfate from a liquid phase of the reaction mixture, leaching the dried solids with an aqueous solution comprising water or dilute sulfuric acid and solubilizing the copper sulfate, and recovering copper from the solubilized copper sulfate. 1. A method of recovering copper from sulfide ores with copper and iron , the method comprising:reacting, in a reaction vessel, a copper-containing sulfide ore with sulfur dioxide gas to form elemental sulfur, an iron oxide and a copper sulfide;condensing and removing the elemental sulfur from the reaction mixture;reacting the residual solids with concentrated sulfuric acid to form copper sulfate and sulfur dioxide gas;recycling the sulfur dioxide gas;separating the solids comprising the iron oxide and copper sulfate from a liquid phase of the reaction mixture;drying the separated solids;leaching the dried solids with an aqueous solution comprising water or dilute sulfuric acid and solubilizing the copper sulfate;separating the solids comprising the iron oxide and gangue from a liquid phase of the reaction mixture; andrecovering copper from the solubilized copper sulfate.2. The method of claim 1 , wherein reacting the copper-containing sulfide ore with sulfur dioxide gas takes place at a temperature of at least about 130° C.3. The method of claim 1 , wherein reacting the residual solids with concentrated sulfuric acid takes place at a temperature of about 180° C. to 500° C.4. The method of claim 1 , wherein the recycled sulfur dioxide gas is reacted with additional copper-containing sulfide ore to form elemental sulfur claim 1 , an iron oxide and a copper sulfide.5. The method of claim 1 , wherein drying the separated solids takes ...

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Номер записи: 95
20-12-2018 дата публикации

HEAP LEACHING

Номер: US20180363100A1
Автор: BATCHELOR Andrew, Dimitrakis Georgios, Dodds Christopher, Goodes Christopher Geoffrey, Jones Aled, Katrib Juliano, Kingman Samuel, Palade Paula, Wellwood Grant Ashley
Принадлежит:

A heap of a material to be leached to recover a valuable metal from the material includes an electromagnetic heating system to generate heat in situ in the heap. 1. A heap of a material to be leached to recover a valuable metal from the material , the heap including an electromagnetic heating system to generate heat in situ in the heap.2. A heap of a material to be leached to recover a valuable metal from the material , the heap including an electromagnetic heating system in the form of a system for exposing the heap to electromagnetic radiation to generate heat in situ in the heap.3. The heap defined in wherein the system for exposing the heap to electromagnetic radiation is operable to selectively heat leach liquor in the heap.4. The heap defined in wherein the system for exposing the heap to electromagnetic radiation is operable to heat heap liquor to at least 50° C. claim 2 , preferably in the range between 45° C. and 65° C. claim 2 , and typically about 55° C. when the material in the heap includes sulphidic copper-containing ore with chalcopyrite as a copper-containing mineral in the ore.5. The heap defined in wherein the system for exposing the heap to electromagnetic radiation is operable to heat heap liquor to less than 85° C. when the material in the heap includes sulphidic copper-containing ore with chalcopyrite as a copper-containing mineral in the ore.6. The heap defined in wherein the electromagnetic heating system is operable to heat leach liquor and minerals containing valuable metal to a uniform temperature range throughout at least 90% of the heap.7. The heap defined in wherein the electromagnetic radiation is radio frequency radiation.8. The heap defined in wherein the electromagnetic radiation is in a lower frequency end of the radio frequency radiation band of radiation.9. The heap defined in wherein the lower frequency end of the radio frequency radiation band of radiation is 5-45 MHz.10. The heap defined in wherein in situations in which the ...

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Номер записи: 96
28-12-2017 дата публикации

METHODS FOR RAPIDLY LEACHING CHALCOPYRITE

Номер: US20170369968A1
Автор: Chaiko David J., Rocks Sara (Sally)
Принадлежит:

A method of improving leach kinetics and recovery during atmospheric or above-atmospheric leaching of a metal sulfide is disclosed. A system for practicing the aforementioned method is also disclosed. Apparatus for practicing the aforementioned method is also disclosed. A new composition of matter which is formed by the aforementioned method, and which may be utilized in the system and apparatus is further disclosed. The new composition of matter may exhibit improved leach kinetics, and may have some utility in the semi-conductor arts, including uses within photovoltaic materials. 2. The method according to claim 1 , further comprising forming an activated metal sulfide product from the metal sulfide during the activation step.3. The method according to claim 2 , wherein the extent of conversion of the metal sulfide to the activated metal sulfide product is calculated by the ratio (x/a).4. The method according to any one of - claim 2 , wherein the metal sulfide comprises chalcopyrite claim 2 , and wherein “c” is substantially equal to two times “a” (2a) and “c” is substantially equal to two times “b” (2b).5. The method according to any one of - claim 2 , wherein the activation step comprises a metathesis reaction wherein the molar ratio of iron released per mole of copper adsorbed is equal to or greater than one.6. The method according to any one of - claim 2 , wherein the metal sulfide comprises chalcopyrite and the molar amount of iron released from the chalcopyrite during exchange exceeds the molar amount of copper absorbed by the chalcopyrite.7. The method according to any one of - claim 2 , wherein the activation step comprises maintaining charge neutrality by producing an anion to balance the (“w”) claim 2 , amount of released iron claim 2 , wherein the anion is produced by oxidizing sulfide atoms within a lattice of the metal sulfide.8. The method according to any one of - claim 2 , wherein the activated metal sulfide product is deficient in sulfide as well ...

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Номер записи: 97
19-11-2020 дата публикации

METHOD OF EXTRACTING METALS FROM POLYMETALLIC SULPHIDE ORES OR CONCENTRATES

Номер: US20200362435A1
Автор: Blanco Aviles Jorge Antonio, Frias Gomez Carlos, SÁNCHEZ RUÍZ Francisco
Принадлежит:

A method of extracting metals from polymetallic sulphide ores or concentrates comprising at least Cu, Zn, Pb and Ag, comprising a first step of atmospheric leaching in sulphate medium in the presence of recycled silver for extracting Cu and Zn and a second step of atmospheric leaching in chloride medium for extracting Pb and Ag. 1. A method of extracting metals from minerals or polymetallic concentrates , comprising Cu sulphides in the form of chalcopyrite , and Zn , Pb and Ag sulphides , comprising the steps of:(a) a first leaching step at atmospheric pressure in sulphate medium of the initial starting material:ores comprising Cu sulphides in the form of chalcopyrite, and Zn, Pb and Ag sulphides or polymetallic concentrates comprising Cu sulphides in the form of chalcopyrite, and Zn, Pb and Ag sulphides, in the presence of oxygen and ferric sulphate, adding sulphuric acid and a silver catalyst to obtain a solution rich in Cu and Zn and a leached solid containing Pb and Ag as sulphates;(b) separating the solution rich in Cu and Zn and the leached solid containing Pb and Ag from step (a) above, in the form of the leached residue of Ag and Pb sulphate precipitates;(c) extracting Cu by adding a copper-specific organic extractant to the solution rich in Cu and Zn, to obtain a purified and charged Cu solution and a spent refined product containing Zn;(d) obtaining Cu by electrodeposition from the purified and charged Cu solution obtained in step (c);(e) removing Fe present in the spent refined product from step (c) above by precipitation through oxidation of Fe(II) to Fe(III) and adjustment of pH between 3 and 4, resulting in a Zn-charged and iron-free solution and an iron precipitate; part of the iron precipitate being recycled to step (a) to provide and maintain the required Fe(III) concentration;(f) purification and concentration of the iron-free Zn-charged solution of step (e) by adding a zinc-specific organic extractant to the Zn-charged solution to obtain a ...

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Номер записи: 98
12-12-2019 дата публикации

Alkaline Oxidation Methods and Systems for Recovery of Metals from Ores

Номер: US20190376158A1
Автор: Buffington Randy
Принадлежит: Hycroft Mining Corporation

An oxidation step for sulfide and transition ores prior to CN leaching to recover 60 to 90 percent of metals from those ores. Use of tona, soda ash or carbonate source in treating sulfide and transition ores for CN leaching recovery of metals, including gold and silver. The oxidation of sulfide and transition ores in the presence of carbonate. Low moisture content in the heap, to enhance available oxygen, during the oxidation of sulfide and transition ores in the presence of carbonate. 1. A system for the processing and recovery of metals from ores having high sulfide content , the system comprising:a. a crushing segment comprising: (i) an ore comprising a metal and a sulfide; and, (ii) crushing equipment;b. an oxidizing pH moderating material handling and distribution segment, the handling and distribution segment comprising an oxidizing pH moderating material and distributing equipment; wherein handling and distribution segment is configured to meter and add the oxidizing pH moderating material to the ore comprising a metal and a sulfide;c. the crushing segment, the handling and distribution segment, or both, configured to mix and conduct an oxidation reaction; whereby the sulfide is oxidized and thereby creating a pre-oxidized ore;d. a heap leach segment, comprising the pre-oxidized ore and a reagent for extracting the metal from the pre-oxidized ore, thereby forming a solution comprising the metal; and,e. a metal recovery segment, whereby the metal is recovered from the solution.2. The system of claim 1 , wherein the system is a surface mine in the earth.3. The system of claim 1 , wherein the ore comprises a sulfide ore.4. The system of wherein the ore comprises a transition ore.5. The system of claim 2 , wherein the ore comprises a sulfide ore.6. The system of claim 2 , wherein the ore comprises a transition ore.7. The system of claim 1 , comprising a holding pile of pre-oxidize ore claim 1 , wherein the oxidation reaction continues in the holding pile.8. The ...

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Номер записи: 99
31-12-2020 дата публикации

EFFICIENT COPPER LEACHING USING ALKANESULFONIC ACIDS

Номер: US20200407821A1
Автор: Ahn Junmo, Lee Jaeheon
Принадлежит:

The present invention relates to use of alkysulfonic acids, with optionally an oxidant peroxide to leach copper from copper sulfide minerals or copper concentrates, a dichromate oxidant or a nitrate oxidant, or a combination thereof. 1. A method of extracting copper from a copper sulfide mineral comprising contacting said mineral with an alkylsulfonic acid and optionally a peroxide chosen from the group consisting of hydrogen peroxide and metal peroxide , a dichromate salt , or a nitrate salt , or a combination thereof.2. A method of extracting copper from a copper concentrate with a copper content of 0.1%-60% comprising contacting said concentrate with an alkylsulfonic acid and optionally a peroxide chosen from the group consisting of hydrogen peroxide and metal peroxide.3. (canceled)4. (canceled)5. The method of claim 1 , wherein said mineral is Chalcopyrite (CuFeS) claim 1 , Covellite (CuS) claim 1 , Chalcocite (CuS) claim 1 , Enargite (CuAsS) claim 1 , Bornite (CuFeS) claim 1 , or Digenite (CuS).6. The method of claim 1 , wherein said peroxide is in contact with copper ore for about 24 to about 96 hours.7. The method of claim 1 , wherein said peroxide is added to said copper mineral or said copper concentrate periodically at a rate of about every 24 hours for up to about 48 hours to about 96 hours.8. (canceled)9. The method of claim 1 , wherein said peroxide is present in a concentration of about 0.3 to about 15% (v/v) peroxide.10. The method of claim 1 , wherein said peroxide is present in a concentration of about 0.3 to about 4.5% (v/v) peroxide.11. (canceled)12. The method of claim 1 , wherein about 30 g/L methanesulfonic acid and about 0.9% (v/v) hydrogen peroxide is contacted with said mineral.13. The method of claim 1 , wherein additional hydrogen peroxide is added periodically at a rate of about 24 hours for up to about 96 hours.14. The method of claim 1 , wherein said alkylsulfonic acid is present at a concentration of about 1 to about 300 g/L.15. ( ...

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Номер записи: 100