ПЕЧЬ ДЛЯ ВЫПЛАВКИ ЦИНКА ИЗ ЦИНКОВЫХ ОТХОДОВ

Печь для выплавки цинка из цинковых отходов, содержащая корпус, футеровку с нагревательными элементами и тигель со сливным отверстием, отличающаяся тем, что снабжена смонтированными на днище корпуса печи затвором, установленным шарнирно в двух взаимоперпендикулярных плоскостях, и ограничительным упором, при этом затвор выполнен с возможностью перекрытия сливного отверстия тигля и взаимодействия с ограничительным упором в рабочем положении. (19) RU (11) 13 041 (13) U1 (51) МПК C22B 19/00 (2000.01) РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К СВИДЕТЕЛЬСТВУ (21), (22) Заявка: 99117861/20, 16.08.1999 (24) Дата начала отсчета срока действия патента: 16.08.1999 (46) Опубликовано: 20.03.2000 (57) Формула полезной модели Печь для выплавки цинка из цинковых отходов, содержащая корпус, футеровку с нагревательными элементами и тигель со сливным отверстием, отличающаяся тем, что снабжена смонтированными на днище корпуса печи затвором, установленным шарнирно в двух взаимоперпендикулярных плоскостях, и ограничительным упором, при этом затвор выполнен с возможностью перекрытия сливного отверстия тигля и взаимодействия с ограничительным упором в рабочем положении. R U 1 3 0 4 1 (54) ПЕЧЬ ДЛЯ ВЫПЛАВКИ ЦИНКА ИЗ ЦИНКОВЫХ ОТХОДОВ Ñòðàíèöà: 1 ru CL U 1 U 1 (73) Патентообладатель(и): Открытое акционерное общество "Новолипецкий металлургический комбинат" (ОАО "НЛМК") 1 3 0 4 1 (72) Автор(ы): Безукладов В.И., Астахов А.Н., Иванов Н.А., Бубнов С.Ю., Евсюков В.Н., Захаров Д.В., Фесенко Б.Б., Илюхин В.И. R U Адрес для переписки: 398040, г.Липецк, пл. Металлургов 2, ОАО "НЛМК" (71) Заявитель(и): Открытое акционерное общество "Новолипецкий металлургический комбинат" (ОАО "НЛМК") U 1 U 1 1 3 0 4 1 1 3 0 4 1 R U R U Ñòðàíèöà: 2 RU FD 13 041 U1 RU 13 041 U1 RU 13 041 U1 RU 13 041 U1 RU 13 041 U1 RU FA 13 041 U1 RU DR 13 041 U1

Metal Recovery Process

A process for recovering a metal chloride or mixed metal chloride from a solid waste material comprising recoverable metal containing constituents produced by lead, copper or zinc smelting and refining processes, said process comprising the steps of: (i) heating the solid waste material; (ii) treating the heated material of step (i) with a gaseous chloride to form a gaseous metal chloride containing product; and (iii) treating the gaseous metal chloride containing product of step (ii) to recover the metal chloride or mixed metal chloride. The metal chloride may be further treated to extract the metal itself.

Method for producing briquettes, method for producing reduced metal, and method for separating zinc or lead

Disclosed is a method for producing briquettes, by which briquettes having enhanced strength can be produced even when the amount of a binder used therefor is reduced as much as possible. Specifically disclosed is a method for producing briquettes, which comprises: a step of forming a primary granular material having an apparent density of 1,000 to 4,000 kg/m 3 using a powder of metal oxides including iron oxide and one or more oxides selected from among of zinc oxide, lead oxide, and titanium oxide; and a step of forming a secondary granular material by compressing a plurality of primary granular materials, while having the primary granular materials contain one or more metal oxides selected from among the zinc oxide, lead oxide, and titanium oxide.

Method for leaching zinc from a zinc ore

A method for leaching zinc from a zinc-bearing carbonate ore, the method comprising the steps of: subjecting the zinc-bearing carbonate ore to elevated temperatures of between about 300° C. and about 900° C. thereby producing a roasted ore; subjecting the roasted ore to an aqueous acid or alkali leach thereby producing an aqueous zinc solution; and subjecting the aqueous zinc solution to a zinc recovery step.

Electric arc furnace dust recycling apparatus and method

The present technology provides an illustrative apparatus for recycle electric arc furnace (EAF) dust and method of use related to the same. The apparatus has a heat controlling region coupled to a separation volume and includes at least one magnet and a cooling region. The heating controlling region operates at a temperature sufficient to transform at least some of the EAF dust into a mixture of gaseous zinc and one or more additional metals. The magnet separates the iron-rich material from the mixture of gaseous zinc and one or more additional metals and the cooling region condenses the gaseous zinc.

Energy Efficient Salt-Free Recovery Of Metal From Dross

A process and an apparatus are disclosed for improved recovery of metal from hot and cold dross, wherein a dross-treating furnace is provided with a filling material with capacity to store heat. This filling material is preheated to a desired temperature by injection of an oxidizing gas to burn non-recoverable metal remaining in the filling material after tapping of the recoverable metal contained in the dross and discharging of the treatment residue. When dross is treated in such furnace, the heat emanating by conduction from the filling material is sufficient to melt and separate the recoverable metal contained in the dross, without addition of an external heat source, such as fuel or gas burners, plasma torches or electric arcs and without use of any salt fluxes. Furthermore, the recovered metal being in the molten state can be fed to the molten metal holding furnace without cooling the melt. 1. A process for treating dross containing a recoverable metal , in order to recover said metal , comprising:(a) charging a batch of dross, resulting from skimming of said dross in a metallurgical plant, into a furnace containing a filling material preheated to a high enough temperature to insure that said dross is thereby heated above the melting point of the metal to be recovered by transfer of energy stored in the filling material;(b) providing an inert atmosphere in the furnace by filling the furnace with inert gas, to prevent oxidation of the dross during the process;(c) rotating or oscillating the dross within the furnace to ensure proper transfer of heat between the hot filling material and the dross and heating of the dross to a temperature above the melting point of the recoverable metal, a separation thereof from a dross residue and from the filling material and its agglomeration at the bottom of the furnace;(d) removing from the furnace the recoverable free metal through a taphole or through the door and the dross residue through the door while leaving inside the ...

Method for treating a solution containing zinc sulphate

The invention relates to a method for treating a solution containing zinc sulphate, so that at least one of the rare metals such as indium, gallium and germanium can be separated from it. A portion of the metals to be separated can be precipitated from zinc sulphate solution by neutralizing the acidic solution and at least a portion is cemented by means of metal powder. The solid precipitates that are formed can be combined and treated subsequently in some suitable way to leach out the desired metals.

SELECTIVE RECOVERY OF MANGANESE, LEAD AND ZINC

This invention relates to a method for the selective recovery of manganese and zinc from brines that includes the steps of contacting a brine with an ionic liquid in order to selectively extract manganese and zinc from the brine into the ionic liquid; and treating the ionic liquid containing extracted manganese and zinc with an aqueous solution to selectively precipitate manganese, producing a manganese depleted, zinc rich ionic liquid. The method can further include the steps of treating the manganese depleted, zinc rich ionic liquid with an aqueous solution to selectively precipitate zinc. 1. A method for recovering manganese from a brine , the method comprising the steps of:providing a brine, said brine comprising manganese;contacting said brine with an ionic liquid and producing an ionic liquid comprising extracted manganese; andtreating said ionic liquid comprising extracted manganese with an aqueous solution to selectively recover manganese from the ionic liquid.2. A method for recovering manganese and zinc from a brine , the method comprising the steps of:providing a brine, said brine comprising manganese and zinc;contacting said brine with an ionic liquid to selectively extract manganese and zinc from said brine and produce an ionic liquid comprising extracted manganese and zinc; andtreating said ionic liquid comprising extracted manganese and zinc with an aqueous solution to selectively recover manganese from the ionic liquid, producing a manganese depleted, zinc rich ionic liquid.3. The method of claim 2 , further comprising the step of treating said manganese depleted claim 2 , zinc rich ionic liquid with an aqueous solution to selectively recover zinc from the manganese depleted claim 2 , zinc rich ionic liquid.4. The method according to claim 1 , wherein the ionic liquid is trihexyl(tetradecyl) phosphonium chloride.5. The method according to claim 1 , wherein the aqueous solution used to recover manganese from the ionic liquid is water.6. The method ...

SELECTIVE LEACH RECOVERY OF ZINC FROM A COMPOSITE SULPHIDE ORE DEPOSIT, TAILINGS, CRUSHED ORE OR MINE SLUDGE

Zinc and lead are usually concomitantly present in Zn—Pb ores and tailings. A novel non-polluting hydrometallurgical process for selectively leaching and recovering zinc (Zn) from a composite lead (Pb) and zinc sulphide containing mineral, crushed untreated rock or unconsolidated mineral particles, mill tailings and/or agglomerated or unagglomerated sulphidic zinc containing waste material without necessitating smelting and refining operation has been developed. A combination of selected oxidant and alkali metal hydroxide has been found effective. A leachant consisting of e.g. a mixture of sodium hydroxide (NaOH) and sodium hypochlorite (NaOCl) is employed to selectively dissolve zinc sulphide at high pH at standard temperature and pressure (STP). The kinetics of leaching along with the effect of varying concentration (preferably of sodium hydroxide and sodium hypochlorite) were systematically investigated. Feed ore containing diverse set of minerals e.g. sulphides and carbonates can also be conveniently treated to selectively and almost quantitatively recover zinc as high purity zinc carbonate. This technology can be employed either in-situ or ex-situ based on the amenability of a particular type of mineral deposit or feed ore. 1. A process for selective leaching of zinc from mixtures and ores containing zinc sulphide , comprising:a. contacting the mixture or ore with an aqueous leachant comprising: 1) an oxidant selected to oxidize the sulphur present only to elemental sulphur, and 2) alkali metal hydroxide in amounts sufficient to form soluble alkali metal zincate;b. extending the contact time between leachant and solids to give the desired zinc recovery and selectivity in the leachate while maintaining operative reagent concentrations;c. separating the desired leachate from the residual solids; andd. recovering zinc from the leachate.2. The process of claim 1 , wherein the oxidant is selected from the group consisting of an oxygen-containing gas claim 1 , a ...

METHOD FOR PRODUCING METAL ZINC

A method for producing metal zinc by liquid/liquid extraction, comprising leaching of a zinc-bearing solid raw material containing antimony with a slightly acid aqueous solution, at a pH value maintained above 3 and less than or equal to 5, with formation of a suspension, drawing-off from the suspension of an aqueous phase containing zinc in solution to be subject to the extraction, additional leaching of the remaining suspension with an acid aqueous solution, at a pH value maintained below 3.5 and greater than or equal to 1, with formation of a pulp, introduction of a neutralizing agent in this pulp with coprecipitation of antimony and other impurities and separation from this neutralized pulp of a zinc-bearing aqueous solution which is recycled to the step for leaching the zinc-bearing solid raw material. 1. A method for producing metal zinc , comprising:extraction of zinc in solution in an aqueous phase with an acid organic solvent, with formation of a zinc-loaded organic liquid phase and of an acid aqueous raffinate,re-extraction of the zinc from the zinc-loaded organic liquid phase, by means of an acid aqueous solution, and 'characterized in that it further comprises:', 'recovery of the re-extracted zinc from the acid aqueous solution by electrolysis,'}leaching of a zinc-bearing solid raw material with a slightly acid aqueous solution, at a pH value maintained greater than 3 and less than or equal to 5, with formation of a suspension in which an aqueous phase contains a main fraction of the zinc of the raw material, which has passed into solution, and a solid phase contains a residual fraction of this zinc as well as impurities, such as antimony,drawing off from this suspension, said aqueous phase containing zinc in solution and exposing this aqueous phase to said extraction step,additional leaching of the remaining suspension after said drawing-off with an acid aqueous solution, at a pH value maintained below 3.5 and greater than or equal to 1, with formation ...

Selective Recovery of Manganese and Zinc From Geothermal Brines

This invention relates to a method for the selective recovery of manganese and zinc from geothermal brines that includes the steps of removing silica and iron from the brine, oxidizing the manganese and zinc to form precipitates thereof, recovering the manganese and zinc precipitates, solubilizing the manganese and zinc precipitates, purifying the manganese and zinc, and forming a manganese precipitate, and recovering the zinc by electrochemical means. 120-. (canceled)21. A method for recovering zinc and manganese from a brine , the method comprising the steps of:providing a brine, said brine comprising manganese and zinc;selectively removing silica and iron from the brine to produce a substantially silica free brine;adjusting the pH of the substantially silica free brine to a pH suitable to form precipitates of zinc and manganese, such that precipitates of zinc and manganese are selectively formed and other metal precipitates are not formed;separating the zinc and manganese precipitates from the brine.22. The method of wherein the precipitates of zinc and manganese are dissolved in an acid.23. The method of wherein the precipitates of zinc and manganese are dissolved in ammonium sulfate.24. The method of wherein the step of selectively removing silica and iron from the brine comprises providing iron (III) at a pH of between about 4.5 and 6 and precipitating the silica and iron from the brine.25. The method of wherein the step of precipitating the zinc and manganese comprises adding sufficient base to adjust the pH to between 6 and 8 and providing an air oxidant to the substantially silica free brine.26. The method of further comprising contacting the zinc with hydrochloric acid to produce zinc chloride.27. A method for recovering zinc and manganese from a brine claim 21 , the method comprising the steps of:providing a brine, said brine comprising manganese and zinc;selectively removing silica and iron from the brine to produce a substantially silica free brine; ...

Methods Of Metal Extraction Using Oximes

Provided are methods method of recovering metal from an aqueous solution, the method comprising contacting an aqueous solution containing at least two metals selected from molybdenum, cobalt, nickel, zinc and iron with an organic solvent and an oxime-containing reagent composition at a predetermined pH, the predetermined pH selected to provide a high first metal extraction and a low second metal extraction; and separating the first metal from the solution. 6. The method of wherein the ketoxime and aldoxime are present in a molar ratio of ketoxime to aldoxime ranging from about 85:15 to about 25:75.7. The method of claim 6 , wherein the ketoxime and aldoxime are present in a molar ratio of ketoxime to aldoxime is about 70:30.8. The method of wherein the ketoxime and aldoxime are present in a molar ratio of ketoxime to aldoxime ranging from about 85:15 to about 25:75.9. The method of claim 8 , wherein the ketoxime and aldoxime are present in a molar ratio of ketoxime to aldoxime is about 70:30.10. The method of claim 1 , wherein the predetermined pH ranges from 1 to 7.11. The method of claim 1 , wherein the pH is adjusted using sulfuric acid or aqueous ammonium hydroxide solution. This application is a divisional application of U.S. application Ser. No. 13/401,939, filed Feb. 22, 2012, which claims priority to U.S. Provisional Patent application No. 61/446,878, filed on Feb. 25, 2011, the contents of both of which are incorporated herein by reference in their entirety.The present invention relates generally to the field of extractive metallurgy. In particular, the present invention relates to metal solvent extraction methods and reagents.Copper and its metal alloys have been used for thousands of years. The importance of copper, as well as a variety of other metals, has led to a continuing search for more efficient and productive procurement methods. One method of copper extraction is a process of leaching, coupled together with solvent extraction, and finally copper ...

Compositions And Methods Of Using A Ketoxime In A Metal Solvent Extraction Reagent

Provided are methods using a ketoxime in metal extraction. One aspect of the invention relates to a method for the recovery of metal from a metal-containing aqueous solution at an elevated temperature using a ketoxime. Another aspect relates to a method of separating iron/copper using a specific ketoxime. Aldoximes may also be added to the reagent compositions used in these methods.

RECOVERY OF BASE METALS FROM SULPHIDE ORES AND CONCENTRATES

The present invention discloses a new recovery of base metals from sulphide ores and concentrates, which comprises mixing the base metal's ore with ferric salts, heating the said mixture; adding water to form a pulp, stirring and filtering the pulp. 1. A method of recovery of base metals from sulphide ores and concentrates , wherein the recovery comprises mixing the base metal's metals' ore with ferric salts whose ratios are between 50% and 200% to the base metals , heating the said mixture to temperatures between 400° C. and 600° C. for a period of 2 to 8 hours; adding water to form a pulp; and stirring the pulp.2. The method of recovery of base metals from sulphide ores and concentrates claim 1 , according to the claim 1 , wherein the base metals comprise copper claim 1 , nickel and zinc.3. The method of recovery of base metals from sulphide ores and concentrates claim 1 , according to claim 1 , wherein the base metals comprise nickel.4. The method of recovery of base metals from sulphide ores and concentrates claim 1 , according to the claim 1 , wherein the ferric salts comprise ferric sulphide claim 1 , ferric chloride claim 1 , or a mixture thereof.5. The method of recovery of base metals from sulphide ores and concentrates claim 1 , according to the claim 1 , wherein the ratio between the ferric salts are between 90 and 120% to base metals.6. The method of recovery of base metals from sulphide ores and concentrates claim 1 , according to the claim 1 , wherein adding the water to the mixture forms the pulp with 10% to 33% solids.7. The method of recovery of base metals from sulphide ores and concentrates claim 1 , according to the claim 1 , wherein adding the water to the mixture forms the pulp with 20% to 30% solids.8. The method of recovery of base metals from sulphide ores and concentrates claim 1 , according to the claim 1 , wherein stirring the pulp further comprises stirring for a period of 1 to 5 hours.9. The method of recovery of base metals from ...

METHOD OF ORE PROCESSING

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 ...

METHOD FOR PRODUCING OXIDE/HYDROXIDE

Provided is a method for producing an oxide and/or hydroxide wherein the ratio of oxide and hydroxide has been controlled. The method produces an oxide, a hydroxide, or a mixture thereof, and obtains an oxide and/or a hydroxide wherein the ratio of oxide and hydroxide has been controlled by means of changing a specific condition relating to at least one fluid to be processed introduced between processing surfaces () when causing the precipitation of the oxide, hydroxide, or mixture thereof by mixing an basic fluid containing at least one type of basic substance and a fluid containing at least one type of metal or metallic substance as the fluids to be processed between the processing surfaces () that are provided facing each other, are able to approach to and separate from each other, and of which at least one rotates relative to the other. The specific condition is at least one condition selected from the group consisting of: the speed of introduction of at least one of the fluids to be processed; and the pH of at least one of the fluids to be processed. 1. A method for producing any one of an oxide and a hydroxide or both , in which at least two kinds of fluid to be processed are used ,of these at least one fluid to be processed is a fluid which contains at least one kind of a metal or a metal compound, andat least one fluid to be processed which is different from the foregoing fluid to be processed is a basic fluid which contains at least one kind of a basic substance, and further,these fluids to be processed are mixed in a thin film fluid formed between at least two processing surfaces which are disposed in a position they are faced with each other so as to be able to approach to and separate from each other, at least one of which rotates relative to the other, thereby producing any one of the oxide and the hydroxide or both by separating the oxide, the hydroxide, or a mixture of them, whereinthis separation accompanied with a controlled ratio of the oxide to ...

Energy efficient salt-free recovery of metal from dross

A process and an apparatus are disclosed for improved recovery of metal from hot and cold dross, wherein a dross-treating furnace is provided with a filling material with good capacity to store heat. This filling material is preheated to a desired temperature by injection of an oxidizing gas to burn non-recoverable metal remaining in the filling material after tapping of the recoverable metal contained in the dross and discharging of the treatment residue. When dross is treated in such furnace, the heat emanating by conduction from the filling material is sufficient to melt and separate the recoverable metal contained in the dross, without addition of an external heat source, such as fuel or gas burners, plasma torches or electric arcs and without use of any salt fluxes. Furthermore, the recovered metal being in the molten state can be fed to the molten metal holding furnace without cooling the melt; in addition, the non-use of fluxing salt for the treatment means that the non-contaminated residue can be used as a cover for the electrolytic cells in the case of aluminum. In the case of zinc dross, the residue is a valuable zinc oxide by-product very low in contaminants.

REMOVAL OF RADIONUCLIDES FROM MIXTURES

The present invention relates to a method of separating radioactive elements from a mixture, wherein the mixture is treated with at least one alkanesulfonic acid and at least one further acid, selected from the group consisting of hydrochloric acid, nitric acid, amidosulfonic acid and mixtures thereof and also the use of at least one alkanesulfonic acid and at least one further acid for separating radioactive elements from mixtures comprising these. 1. A method of separating a radioactive element from a mixture , the method comprising:treating the mixture with at least one alkanesulfonic acid and at least one further acid selected from the group consisting of hydrochloric acid, nitric acid, amidosulfonic acid and a mixture thereof.2. The method according to claim 1 , wherein the at least one alkanesulfonic acid and the at least one further acid are aqueous compositions.3. The method according to claim 1 , wherein the mixture is treated firstly with the at least one alkanesulfonic acid and subsequently with the at least one further acid.4. The method according to claim 1 , wherein the mixture is treated firstly with the at least one further acid and subsequently with the at least one alkanesulfonic acid.5. The method according to claim 1 , wherein methanesulfonic acid is used as the at least one alkanesulfonic acid.6. The method according to claim 1 , wherein the mixture is treated with an aqueous composition comprising the at least one alkanesulfonic acid and the at least one further acid.7. The method according to claim 1 , wherein the mixture is treated with an aqueous composition consisting of the at least one alkanesulfonic acid claim 1 , the at least one further acid claim 1 , and water.8. The method according to claim 1 , wherein the mixture is an ore or an ore concentrate.9. The method according to claim 1 , wherein the radioactive element is selected from the group consisting of uranium-238 claim 1 , thorium-230 claim 1 , radium-226 claim 1 , lead-210 claim ...

Precipitation of Zinc from Solution

A method of precipitating a zinc containing solid from an acidic solution containing dissolved zinc and magnesium comprising contacting the solution with a calcium containing neutralising agent to raise the pH of the solution to 4.5 to 7.5 at a temperature of from 70 to 95° C. to thereby precipitate a solid zinc containing material and gypsum without causing substantial precipitation of magnesium, and separating the zinc containing material from the gypsum. 1. A method of precipitating a zinc containing solid from an acidic solution containing dissolved zinc and dissolved magnesium comprising contacting the solution with a calcium containing neutralising agent to raise the pH of the solution to 4.5 to 7.5 at a temperature of from 70 to 95° C. to thereby precipitate a solid zinc containing material and gypsum without causing substantial precipitation of magnesium , and separating the zinc containing material from the gypsum.2. A method as claimed in wherein the method comprises contacting the solution with a calcium containing neutralising agent to raise the pH of the solution to 5.5 to 7.5 at a temperature of from 70 to 95° C. to thereby precipitate a solid zinc containing material and gypsum without causing substantial precipitation of magnesium claim 1 , and separating the zinc containing material from the gypsum.3. A method as claimed in wherein the calcium containing neutralising agent is selected from lime (CaO) or hydrated lime (Ca(OH)) and zinc in solution is precipitated in the form of zinc oxide.4. A method as claimed in or wherein zinc in solution is precipitated as zinc oxide and the process involves a precipitation step that is operated at a pH from 5.5-6.5 claim 2 , preferably about 6.5 claim 2 , and an operating temperature of from 70 to 95° C. claim 2 , preferably about 90° C.5. A method as claimed in wherein the method comprises contacting the solution with a calcium containing neutralising agent to raise the pH of the solution to 4.5 to 6.5 claim 1 ...

METHOD FOR INHIBITING EXTRACTANT DEGRADATION OF DSX PROCESS THROUGH MANGANESE EXTRACTION CONTROL

Provided is a method for inhibiting extractant degradation in the DSX process through the manganese extraction control, the method comprising: (a) stirring DSX solvent and DSX feed solution, which is a solution containing a valuable metal from which iron has been removed in an agitator, in which soda ash (NaCO) is further added to maintain a constant pH; and (b) scrubbing the manganese from the DSX solvent, extracted in step (a). 1. A method for inhibiting extractant degradation in a DSX process through a manganese extraction control , the method comprising:{'sub': 2', '3, '(a) stirring DSX solvent and DSX feed solution, which is a solution containing a valuable metal from which iron has been removed by a step of removing iron, in which soda ash (NaCO) is further added to maintain a constant pH; and'}(b) scrubbing the manganese from the DSX solvent, extracted in step (a)2. The method of claim 1 , wherein a plurality of agitators is used in step (a) claim 1 , and the DSX feed solution and DSX solvent extracting cobalt and zinc in the first agitator are sequentially treated in the same manner in the next agitator.3. The method of claim 1 , wherein the DSX feed solution of step (a) includes cobalt (Co) and zinc (Zn) claim 1 ,the raffinate further includes aluminum (Al) and manganese (Mn), andthe raffinate further include at least one of cadmium (Cd), copper (Cu), potassium (K), magnesium (Mg), calcium (Ca), sodium (Na), and nickel (Ni).4. The method of claim 1 , wherein the DSX solvent of step (a) is a mixture of an extractant and kerosene claim 1 , which is a diluent claim 1 , andthe extractant includes aliphatic hydroxy oxime and neodecanoic acid in a volume ratio of 1:0.5 to 4.0.5. The method of claim 1 , wherein the DSX solvent and DSX feed solution are input in a volume ratio of 1:0.5 to 2 in step (a) claim 1 , andthe stirring temperature is 35° C. to 55° C. and the stirring time is 0.5 minutes to 3 minutes in step (a).6. The method of claim 1 , wherein the ...

Method for inhibiting extractant degradation of dsx process through metal extraction control

Provided is a method for inhibiting extractant degradation in the DSX process through the metal extraction control, the method comprising steps of: (a) adding limestone to a copper solvent extraction-raffinate to precipitate iron (Fe) and aluminum (Al) as a slurry, recovering a clarifying liquid; and (b) adding sulfuric acid to the recovered clarifying liquid to adjust the pH thereof.

METHOD FOR INHIBITING EXTRACTANT DEGRADATION BY DILUENT AND EXTRACTANT INPUT METHOD

Provided is a method for inhibiting extractant degradation by a diluent and an extractant input manner, the method including steps of: (a) determining and analyzing the total volume of the DSX solvent when the diluent and the extractant, which are the DSX solvents, are added in the DSX process and identifying the concentration of the extractant; (b) calculating an extractant concentration according to an amount of the diluent to be added based on the analysis value of step (a), and then adding the extractant; (c) determining the ratio between the extractants through analysis after adding the extractants; (d) adding the extractant to be needed when the ratio between extractants is out of the range; and (e) adding the diluent and analyzing the ratio between the extractants. 1. A method for inhibiting extractant degradation by a diluent and an extractant input manner , the method comprising steps of:(a) determining and analyzing the total volume of a DSX solvent when the diluent and the extractant, which are the DSX solvents, are added in a DSX process and identifying the concentration of the extractant;(b) calculating an extractant concentration according to an amount of the diluent to be added based on the analysis value of step (a), and then adding the extractant;(c) determining a ratio between the extractants through analysis after adding the extractants;(d) adding the extractant to be needed when the ratio between the extractants is out of the range; and(e) adding the diluent and analyzing the ratio between the extractants.2. The method of claim 1 , wherein the DSX solvent includes an oxime-based extractant and a neodecanoic acid-based extractant in addition to kerosene claim 1 , a diluent.3. The method of claim 2 , wherein the extractant concentration is measured using a gas chromatography claim 2 , andwherein the oxime-based extractant concentration is measured by a method of measuring anti-oxime, and the neodecanoic acid-based extractant concentration is ...

Method of inhibiting extractant degradation by controlling extractive capacity and preventing direct degradation

Provided is a method for inhibiting extractant degradation comprising preparing step, extracting step and scrubbing step, the method including: (a) the preparing step of a DSX solvent by adjusting the extractant concentration of the DSX solvent to a specific range; (b) the extracting step of metal included in the feed solution by adjusting the ratio of the organic (solvent) and an aqueous (solution) as a feed solution; (c) the scrubbing step of adjusting the zinc concentration of the solution using zinc sulfate; and (d) stripping step.

METHOD FOR REMOVING FLUORIDE FROM A ZINC-CONTAINING SOLUTION OR SUSPENSION, DEFLUORIDATED ZINC SULFATE SOLUTION AND USE THEREOF, AND METHOD FOR PRODUCING ZINC AND HYDROGEN FLUORIDE OR HYDROFLUORIC ACID

Embodiments of the invention relate to a process for removing fluoride from a solution or suspension containing zinc, in particular a solution of zinc sulfate, a defluoridated solution of zinc sulfate obtainable by such a process, its use as well as processes for producing zinc and hydrogen fluoride or hydrofluoric acid. The process for removing fluoride comprises (i) providing a solution or suspension A containing zinc, wherein the solution or suspension A containing zinc further contains fluoride ions; (ii) adding a solution B containing a dissolved salt of a rare earth element to the solution or suspension A containing zinc, wherein a solid comprising a rare earth element fluoride and a solution C containing zinc are formed; and (iii) separating the solid from the solution C containing zinc, wherein the solution C containing zinc has a lower concentration of fluoride ions than the solution or suspension A containing zinc. 115.-. (canceled)17. The process according to claim 16 , wherein the solution or suspension A containing zinc is formed by at least partly dissolving a composition containing zinc oxide claim 16 , in particular waelz oxide claim 16 , wherein the composition containing zinc oxide is at least partly dissolved to form the solution or suspension A containing zinc.18. The process according to claim 16 , wherein the solution B contains a dissolved sulfate of a rare earth element.19. The process according to claim 16 , wherein the rare earth element is selected from the group consisting of lanthanum (La) claim 16 , cerium (Ce) claim 16 , praseodymium (Pr) and neodymium (Nd).20. The process according to claim 16 , wherein in step (ii) an amount of substance of the dissolved salt of a rare earth element is added claim 16 , the amount being adapted to an estimated or previously determined amount of substance of fluoride ions in the solution or suspension A containing zinc.21. The process according to claim 16 , wherein claim 16 , after adding the solution ...

METHOD FOR SELECTIVE PRECIPITATION OF IRON, ARSENIC AND ANTIMONY

A method for selectively processing a polymetallic oxide solution containing a plurality of base metals comprising at least one of: Cu, Co, Ni, Zn associated with iron, comprising acid leaching the solution; recovering a filtered leachate; oxidizing the leachate; and adjusting the pH of the leachate in presence of a complexing agent; wherein the acidic solution is one of: i) a hydrochloric acid solution and ii) a sulfuric acid solution at a pH lower than about 1.5, and the complexing agent is one of: i) ammonium chloride and ii) ammonium sulfate, the step of adjusting the pH comprising raising the pH to a range between about 2.5 and about 3.5. 1. A method for separation of contaminants comprising at least one of: iron , arsenic and antimony , from an acidic solution of base metals comprising at least one of: cobalt , nickel , copper and zinc , and at least one of: iron , arsenic and antimony , comprising a preliminary oxidation of the contaminants , a selective precipitation of the contaminants by addition of an ammonium salt in a stoichiometric amount followed by a pH adjustment , and recovery of the base metals in solution.2. The method of claim 1 , wherein the acidic solution of base metals is one of: a hydrochloric acid solution and a sulfuric acid solution.3. The method of claim 1 , wherein the acidic solution of base metals has a pH in a range between about 0.5 and about 1.5.4. (canceled)5. The method of claim 1 , wherein the ammonium salt is one of: ammonium sulfate and ammonium chloride.6. The method of claim 1 , wherein said pH adjustment comprises adjusting the pH a value in a range between about 2.5 and about 3.5.7. The method of claim 1 , wherein said pH adjustment comprises adjusting the pH to a value in a range between about 2.8 and about 3.2.8. The method of claim 1 , wherein said pH adjustment comprises raising the pH of the acidic solution using one of:ammonium hydroxide, ammonia, calcium hydroxide, sodium hydroxide and magnesium hydroxide.9. The ...

Method and Apparatus For High Temperature Production of Metals

Carbothermic reduction of magnesium oxide at approximately 2200 degrees Kelvin yields a high temperature mixture of magnesium vapors and carbon monoxide gas. Previous processes have sought to cool or alter the mixture to cause the yield of pure magnesium, which is then used in subsequent processes for its reducing properties. The present invention takes advantage of the stability and inertness of carbon monoxide at elevated temperatures enabling the magnesium vapor/carbon monoxide gas mixture from the carbothermic process to be used directly for the production of other metals at high temperatures. For example, Chromium oxide or chloride, manganese oxide or chloride, zinc oxide or chloride or sulfide, and several other metal compounds can be reduced by the magnesium vapor/carbon monoxide gas mixture at temperatures high enough to prevent the gas mixture from back-reacting to magnesium oxide and carbon. 1. A method for reduction of metal oxides , hydroxides , halides , sulfides or polyatomic compounds thereof including the steps of:conducting carbothermic reduction of magnesium oxide in the presence of carbon at an elevated temperature of from 1500 to 2600 degrees Kelvin, producing a mixture of magnesium vapor and carbon monoxide gas and contacting said metal oxides, hydroxides, halides, sulfides or polyatomic compounds thereof with said mixture at said elevated temperature,preventing said mixture of magnesium vapor and carbon monoxide gas from undergoing back-reaction to magnesium oxide and carbon,whereby said magnesium vapor effects reduction of said metal oxides, hydroxides, halides, sulfides or polyatomic compounds thereof to metallic forms with the production of magnesium oxide or halide, andwhereby said magnesium oxide is recovered and recycled to said carbothermic reduction.2. The method of wherein said elevated temperature is from 2000 to 2400 degrees Kelvin.3. The method of wherein said elevated temperature is about 2200 degrees Kelvin.4. The method of ...

PROCESS FOR REMOVAL OF ZINC, IRON AND NICKEL FROM SPENT COMPLETION BRINES AND PRODUCED WATER

Zinc, nickel and iron can be recovered from spent brines and produced water using a method that includes admixing an aqueous fluid with hydrazine to form a hydrazine complex and then filtering or otherwise removing the hydrazine complex from the aqueous fluid. Once treated, the aqueous fluid can then be recycled or at be the subject to an easier disposal. The isolated metal hydrazine complex may be recycled or discarded. 1. A method for recovering zinc metal , nickel metal , iron metal , zinc cations , nickel cations or iron cations from fluids produced from an oil well , the method comprising admixing an aqueous fluid produced from an oil well with hydrazine under conditions sufficient to produce an insoluble zinc or nickel hydrazine complex and removing the insoluble zinc or nickel hydrazine complex from the fluid.2. The method of wherein the hydrazine is employed as an aqueous solution having a hydrazine concentration of from about 10% to about 50%.3. The method of wherein the hydrazine is employed as an aqueous solution having a hydrazine concentration of from about 20% to about 40%.4. The method of wherein the hydrazine is employed as an aqueous solution having a hydrazine concentration of about 35%.5. The method of wherein the molar ratios of hydrazine to zinc claim 1 , nickel claim 1 , or iron necessary to form an insoluble complex is from about one to about three moles of hydrazine to about one mole of zinc claim 1 , nickel claim 1 , or iron.6. The method of wherein the molar ratios of hydrazine to zinc claim 5 , nickel claim 5 , or iron necessary to form an insoluble complex is from about one to about two moles of hydrazine to about one mole of zinc claim 5 , nickel claim 5 , or iron.7. The method of wherein the insoluble zinc claim 1 , nickel claim 1 , or iron hydrazine complex is removed from the fluid by filtering.8. The method of wherein the insoluble zinc claim 1 , nickel claim 1 , or iron hydrazine complex is removed from the fluid by centrifugation.9 ...

METHOD FOR THE RECOVERY OF ZINC

A method for the recovery of zinc from zinc containing materials using a smelting apparatus for smelting a metalliferous feed material, wherein the smelting apparatus includes a smelting vessel, a smelt cyclone mounted on the smelting vessel and in connection with the inside of the smelting vessel and an off-gas duct connected to the smelt cyclone, and wherein the method includes the steps of: 2. The method according to claim 1 , wherein the zinc containing materials injected into the smelting vessel are injected above and/or in a slag layer on the liquid feed material in the smelting vessel.3. The method according to claim 2 , wherein the zinc containing materials injected into the smelting vessel are injected at a first and/or a second level wherein the first level is between the smelt cyclone and the slag layer on the liquid metal in the smelting vessel and wherein the injection at the second level is carried out through a supply lance into the slag layer.4. The method according to claim 1 , wherein the particle size of the zinc containing materials injected into the smelt cyclone are in a range of at most 2.0 mm.5. The method according to claim 1 , wherein the particle size of the zinc containing materials injected into the smelt vessel at the first level have a particle size of at most 15 cm.6. The method according to claim 1 , wherein the particle size of the zinc containing materials injected at the second level into the slag layer have a particle size of at most 50 μm.7. The method according to claim 1 , wherein the off-gas is guided through an inclined off-gas duct part downstream of the smelting vessel and the smelt cyclone.8. The method according to claim 1 , wherein the off-gas is cooled/quenched in an upright off-gas duct part downstream of the inclined off-gas duct part.9. The method according to claim 8 , wherein the off-gas is cooled/quenched to a temperature of ≤1200° C.10. The method according to claim 1 , wherein the off-gas is passed through a ...

PROCESSING OF SULFATE AND/OR SULFIDE-RICH WASTE USING CO2-ENRICHED GASES TO SEQUESTER CO2, REDUCE ENVIRONMENTAL IMPACTS INCLUDING ACID ROCK DRAINAGE AND PRODUCE REACTION PRODUCTS

A process is provided for stabilizing a sulfate and/or sulfide-rich waste material, comprising metal sulfide minerals, and sequestering COcomprises exposing the material to a CO-enriched gas mixture, reacting the CO-enriched gas mixture with the metal sulfide minerals and forming a CO-depleted gas mixture and a carbon-containing compound and at least one product selected from the group consisting of a purified metal or a metal-rich compound suitable for smelting or refining, sulfuric acid, sulfur and sulfurous acid, and system and apparatus therefor. 1. A process for stabilizing a sulfate and/or sulfide-rich waste material , comprising metal sulfide minerals , and sequestering COwhich comprises:{'sub': '2', 'exposing the waste material to a CO-enriched gas mixture,'}{'sub': '2', 'reacting the CO-enriched gas mixture with the metal sulfide minerals; and'}{'sub': '2', 'forming a CO-depleted gas mixture and a carbon-containing compound and at least one product selected from the group consisting of a purified metal or a metal-rich compound suitable for smelting or refining, sulfuric acid, sulfur, hydrogen sulfide, sulfur dioxide, sulfur trioxide and sulfurous acid.'}2. The process of wherein CO-enriched gas mixture is sourced from at least one of a commercial and industrial COemitting source.3. The process of wherein CO-enriched gas mixture comprises >1% by weight of CO.4. The process of wherein CO-enriched gas mixture comprises COand at least one of O claim 1 , Nand/or SO.5. The process of wherein CO-enriched gas mixture is sourced from one of a fossil fuel-based hydrogen production plant and a biomass energy facility which is CO-generating.6. The process of wherein CO-enriched gas mixture is sourced from at least one of a power plant claim 1 , a lime kiln claim 1 , a cement plant claim 1 , a hydrocarbon-fueled electrical power generation facility claim 1 , a heating plant claim 1 , a natural gas processing plant claim 1 , and a synthetic fuel plant claim 1 , which is ...

INTEGRATED RECOVERY OF METALS FROM COMPLEX SUBSTRATES

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 ...

Process for reducing the amounts of zinc (zn) and lead (pb) in materials containing iron (fe)

The present invention relates to a process for reducing the amounts of zinc and lead in starting materials comprising iron which comprises the steps of: —selectively leaching Zn and Pb comprised in the starting materials by mixing the starting materials with hydrochloric acid and an oxidizing agent comprising at least 5 wt-% of manganese dioxide in one or several reactor(s) at a temperature superior or equal to 35° C. and at a p H comprised between 0.5 and 3.5, —filtrating the mixture obtained in order to separate the solid and the filtrate, —washing the solid with water, the resulting solid comprising mainly Fe, a reduced amount of Zn and Pb compared to the original starting materials, —recovering the filtrate of step b) and the washing water of step c) which comprise chloride, solubilized Zn and Pb in one or several reactor(s), —precipitating solubilized Zn, Pb in the recovered filtrate and the washing water by mixing with a neutralizing agent, —filtrating and washing the solid residues obtained in step e) in order to remove the chloride from the solid residues which comprise at least Pb and Zn. The present invention also refers to the use of the materials obtained after treatment in a in a sinter plant and blast furnace or in all pyrometallurgical furnace which value iron such as electrical arc furnace (EAF), cupola furnace, oxycup furnace, submerged arc furnace (SAF), a plasma furnace, rotary hearth furnace.

Method of inhibiting degradation of dsx extractant by auxiliary means

A method of inhibiting degradation of an extractant by utilizing several auxiliary means in the DSX process: includes (a) preparing adjustment of the concentration of an extractant of a DSX solvent to a certain range; (b) extracting a metal contained in a pregnant leached solution by adjusting the ratio of the extractant and the diluent in the DSX solvent to a certain range; (c) measuring the pH of the aqueous phase solution by separating mixture into the aqueous phase solution and the organic phase solvent using a settler after step of extracting; (d) controlling the pH by adding soda ash (Na 2 CO 3 ) so as to maintain the pH of the aqueous phase solution to be 3 to 7; and (e) scrubbing with scrubbing solution having a zinc concentration of 2 to 20 g/L by zinc sulfate (ZnSO 4 ) to remove the manganese from the organic phase solvent containing the extracted metal.

METHOD OF INHIBITING DEGRADATION OF EXTRACTANT BY ANHYDROUS ENVIRONMENT AVOIDING AND METAL STRIPPING

Provided is a method of inhibiting degradation of an extractant by an anhydrous environment avoiding and metal stripping, the method including the steps of: (a) stopping the addition of soda ash (NaCO) to an extracting reaction tank; (b) starting solution recirculation and stopping solvent recirculation of a settler; (c) supplying a solvent from a loaded organic tank to a scrubbing reaction tank, in which the scrubbing reaction tank, stripping reaction tank and extracting reaction tank are connected for circulation and operating stirrers of the scrubbing reaction tank, stripping reaction tank and extracting reaction tank; (d) supplying a sulfuric acid solution having a controlled concentration with a diluting solution to the stripping reaction tank; (e) transferring the solvents of the settler, the loaded organic tank and all the pipes to the scrubbing reaction tank; and (f) stopping the step (e) and initiating solvent recirculation. 1. A method of inhibiting degradation of an extractant by an anhydrous environment avoiding and metal stripping , the method comprising the steps of:{'sub': 2', '3, '(a) stopping the addition of soda ash (NaCO) to an extracting reaction tank;'}(b) starting solution recirculation and stopping solvent recirculation of a settler;(c) supplying a solvent from a loaded organic tank to a scrubbing reaction tank, wherein the scrubbing reaction tank, stripping reaction tank and extracting reaction tank are connected for circulation and operating stirrers of the scrubbing reaction tank, stripping reaction tank and extracting reaction tank;(d) supplying a sulfuric acid solution having a controlled concentration with a diluting solution to the stripping reaction tank;(e) transferring the solvents of the settler, the loaded organic tank and all the pipes to the scrubbing reaction tank; and(f) stopping the step (e) and initiating solvent recirculation.2. The method of claim 1 , wherein the step (f) further includes step (g) of recovering the solvent ...

EXTRACTION METHODS FROM REFRACTORY ORES

A method for extracting and separating Gold, Silver, Copper, Zinc and/or Lead from an Arsenic-containing ore, concentrate or tailings characterized in that the extraction is carried by roasting in the presence of a calcium-containing material and at least one of an alkali metal halide and alkaline metal halide. In the method, Arsenic remains immobilized in the extraction residue. 1. A method for extracting at least one metal from an Arsenic-containing ore , concentrate or tailings , the method comprising:mixing the ore, concentrate or tailings with a calcium-containing material and at least one from an alkali metal halide and alkaline metal halide;heating the mixture in the presence of air or oxygen, and thereby producing metal-containing volatile complexes and a solid residue comprising immobilized arsenic;condensing the volatile complexes in a scrubber containing at least one dry sorbent bed, and thereby producing a metal-loaded sorbent bed;recovering the metal from the metal-loaded sorbent bed; anddisposing of the residue containing immobilized Arsenic.2. The method of claim 1 , wherein the metal is Gold claim 1 , Silver claim 1 , Copper claim 1 , Zinc claim 1 , Lead claim 1 , or any mixture thereof; and wherein if a mixture of metals is extracted claim 1 , each of the metals is condensed into a separate sorbent bed.3. The method of or claim 1 , wherein the calcium-containing material is selected from calcium carbonate claim 1 , calcium chloride claim 1 , calcium phosphate claim 1 , calcium sulfate claim 1 , calcium sulfide claim 1 , calcium hydroxide claim 1 , calcium oxide claim 1 , and any mixture thereof.4. The method of claim 1 , wherein the calcium-containing material is selected from lime claim 1 , limestone claim 1 , calcite claim 1 , dolomite or any mixture thereof.5. The method of claim 1 , wherein the ore claim 1 , concentrate or tailings is an Arsenic Silver containing ore claim 1 , concentrate or tailings.6. The method of claim 1 , wherein the ore ...

Ultrasonic Probes with Gas Outlets for Degassing of Molten Metals

Ultrasonic probes containing a plurality of gas delivery channels are disclosed, as well as ultrasonic probes containing recessed areas near the tip of the probe. Ultrasonic devices containing these probes, and methods for molten metal degassing using these ultrasonic devices, also are disclosed.

PROCESS FOR THE REMOVAL OF METAL OR IMPURITIES FROM ELECTRIC ARC FURNACE DUST

A method for preparing Electric Arc Furnace dust (EAFD) for metal recovery, comprising: a) mixing the EAFD comprising zinc oxide or lead oxide, or a mixture of both, with a liquid and a binder to produce an EAFD mixture; b) producing a shaped EAFD pellet; and c) drying the shaped EAFD pellet is disclosed. A method for recovering zinc from Electric Arc Furnace dust (EAFD), comprising: a) heating the EAFD comprising at least one metal comprising zinc in an inert gas atmosphere at a temperature ranging from 700° C. to 1100° C.; and b) evaporating the at least one metal comprising zinc from the EAFD and collecting the at least one metal is also disclosed. A method for recovering an impurity from Electric Arc Furnace dust (EAFD), comprising: a) heating the EAFD comprising an impurity in an inert gas atmosphere at a temperature ranging from 700° C. to 1100° C.; and b) evaporating the impurity from the EAFD and collecting the impurity is also disclosed. A method for recovering iron oxide from Electric Arc Furnace dust (EAFD), comprising: a) heating the EAFD comprising iron oxide and at least one metal in an inert gas atmosphere at a temperature ranging from 700° C. to 1100° C.; and b) separating the iron oxide by evaporating the at least one metal from the EAFD and leaving the iron oxide as a residue is also disclosed. 1. A method for preparing Electric Arc Furnace dust (EAFD) for metal recovery , comprising:a) mixing the EAFD comprising zinc oxide or lead oxide, or a mixture of both, with a liquid and a binder to produce an EAFD mixture;b) producing a shaped EAFD pellet; andc) drying the shaped EAFD pellet.2. (canceled)3. The method according to claim 1 , wherein the metal oxide is zinc oxide.4. The method according to claim 1 , wherein the metal oxide is lead oxide.5. The method according to claim 1 , wherein the liquid is water.6. The method according to claim 1 , wherein the liquid is present in an amount from about 6.0 wt % to 12.0 wt % claim 1 , based on the total ...

SYSTEM AND METHOD FOR THE RECOVERY OF METAL VALUES FROM SLAGS, DROSSES, AND OTHER METAL-BEARING MATERIALS

A method of recovering metal values from metal-bearing materials such as slags and drosses includes the steps of pulverizing the material to particles less than about 100 μm; leaching the pulverized material with a solution of ammonium chloride, sodium chloride, and potassium chloride; sequentially recovering at least two metals from the leachate by the addition of zinc using a sequential cementation process; and recovering zinc from the solution by electrowinning. 1. A method of recovering metal values from metal-bearing materials such as slags or drosses , comprising:pulverizing the material to particles less than about 100 μm;leaching the pulverized material with a solution of ammonium chloride and at least one alkali or alkali earth chloride;sequentially recovering at least two metals from the leachate by the addition of zinc using a sequential cementation process; andrecovering zinc from the solution by electrowinning.2. The method according to wherein the alkali and alkali earth chlorides include at least one of sodium chloride and potassium chloride.3. (canceled)4. The method according to wherein the material is pulverized to particles less than about 10 μm.5. (canceled)6. (canceled)7. The method according to wherein the leaching is conducted at about 85° C. to about 95° C.8. The method according to wherein the leaching is conducted at atmospheric pressure.9. The method according to further comprising adding sufficient mineral acid to maintain the pH of the leaching solution less than about 3.10. (canceled)11. (canceled)12. The method according to wherein the mineral acid is at least one of HCl and HSO.13. The method according to further comprising raising the pH of leachate to about 4 to precipitate iron.14. The method according to further comprising adding COto precipitate at least one of calcium claim 1 , magnesium claim 1 , and manganese as a carbonate.15. The method according to further comprising passing the leachate through a crystallizer to remove ...

METHOD FOR THE TREATMENT OF ALUMINIUM SLAGS TREATMENT AND ASSOCIATED PLANT

Method for the secondary fusion aluminum slags treatment to obtain finished goods for agricultural, domestic and industrial use includes treating aluminous material with concentrated sulfuric acid to obtain aluminum sulfate, wherein the aluminous material comes from slags fed in lots of finite-dimension in a treatment plant of aluminum slags and includes aluminum oxides present in at least 30% by weight, the method includes: a) a first step of separating the metals present in the slags, by known methodologies, to obtain powders of metals as Fe, Cu, Zn, Ni and to obtain an aluminous component in the form of aluminum grains; b) a subsequent step of treating the aluminous component, with sulfuric acid to obtain aluminum sulfate in solution and/or in form of crystals; c) a subsequent step of obtaining a solid residual portion, derived from step b), apt to be used as a refractory material in applications with thermal character. 1. Method for the secondary fusion aluminum slags treatment for obtaining finished goods intended for agricultural , domestic and industrial use comprising the treatment of the aluminous material with concentrated sulfuric acid for obtaining aluminum sulfate , wherein the aluminous material , comes from slags fed in lots of finite-dimension in a plant of aluminum slags treatment and comprises aluminum oxides present for at least 30% in weight , the method comprising:a) a first step of separation of the metals present in the slags, with known methodologies, for obtaining powders of metals like Fe, Cu, Zn, Ni and for obtaining an aluminous component in form of aluminum grains;b) a following step of treatment of the aluminous component, with sulfuric acid for obtaining aluminum sulfate in solution and/or in form of crystals;c) a following step of obtainment of a solid residual portion, obtained from the preceding step of treatment of said aluminous component, apt to be used as refractory material in applications with thermal character.2. Method for ...

Treated Geothermal Brine Compositions With Reduced Concentrations of Silica, Iron and Manganese

This invention relates to treated geothermal brine compositions containing reduced concentrations of iron, silica, and manganese compared to the untreated brines. Exemplary compositions contain a concentration of manganese less than 10 mg/kg, a concentration of silica ranging from less than 10 mg/kg, and a concentration of iron less than 10 mg/kg, and the treated geothermal brine is derived from a Salton Sea geothermal reservoir. 1. A treated geothermal brine composition , the composition comprising a treated geothermal brine having a concentration of manganese ranging from 0 to 200 mg/kg , a concentration of silica ranging from 0 to 80 mg/kg , and a concentration of iron ranging from 0 to 300 mg/kg.2. The treated geothermal brine composition of claim 1 , wherein the concentration of manganese ranges from 0 to 200 mg/kg claim 1 , the concentration of silica ranges from 0 to 30 mg/kg claim 1 , and the concentration of iron ranges from 0 to 300 mg/kg.3. The treated geothermal brine composition of claim 1 , wherein the concentration of manganese is less than about 100 mg/kg claim 1 , the concentration of silica is less than about 30 mg/kg claim 1 , and the concentration of iron is less than about 300 mg/kg.4. The treated geothermal brine composition of claim 1 , wherein the concentration of manganese is less than about 50 mg/kg claim 1 , the concentration of silica is less than about 30 mg/kg claim 1 , and the concentration of iron is less than about 300 mg/kg.5. The treated geothermal brine composition of claim 1 , wherein the concentration of manganese is less than about 30 mg/kg claim 1 , the concentration of silica is less than about 30 mg/kg claim 1 , and the concentration of iron is less than about 300 mg/kg.6. The treated geothermal brine composition of claim 1 , wherein the concentration of manganese is less than about 30 mg/kg claim 1 , the concentration of silica is less than about 30 mg/kg claim 1 , and the concentration of iron is less than about 200 mg/kg. ...

METHOD FOR PROCESSING STEELMAKING DUST, METHOD FOR PRODUCING ZINC, METHOD FOR PRODUCING IRON- AND STEELMAKING RAW MATERIAL, AND RAW MATERIAL OF IRON AND STEEL

[Object] To provide a method for processing steelmaking dust, a method for producing zinc, and a method for producing an iron- and steelmaking raw material, which are more advantageous than the Waelz method in terms of energy and economy. 1. A method for processing steelmaking dust , comprising:adding a calcium compound containing Ca to steelmaking dust containing zinc, the number of moles of Ca being equivalent to or more than the number of moles of Fe in the steelmaking dust; andheating and reducing, in a furnace, the steelmaking dust to which the calcium compound has been added, without generating melt.2. The method for processing steelmaking dust according to claim 1 , whereinthe calcium compound contains at least one of quicklime (CaO), hydrated lime (Ca(OH)2), and calcium carbonate (CaCO3).3. The method for processing steelmaking dust according to claim 1 , whereinthe step of adding the calcium compound to the steelmaking dust includes adjusting a ratio of the number of moles of Ca in the calcium compound to the number of moles of Fe in the steelmaking dust to be not less than 1.3 and not more than 1.5.4. The method for processing steelmaking dust according to claim 1 , whereinthe step of heating and reducing the steelmaking dust to which the calcium compound has been added includes adjusting a temperature in the furnace to be less than 1200° C.5. The method for processing steelmaking dust according to claim 1 , whereinthe step of adding the calcium compound to the steelmaking dust includes further adding a carbon material to the steelmaking dust.6. The method for processing steelmaking dust according to claim 1 , whereinthe step of heating and reducing the steelmaking dust to which the calcium compound has been added includes adding reducing gas to an inside of the furnace.7. The method for processing steelmaking dust according to claim 1 , whereinthe furnace is a rotary kiln, a rotary hearth, or a shaft furnace.8. A method for producing zinc claim 1 , ...

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

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 , ...

PYRO-METALLURGICAL PROCESS IN A ROTARY KILN

A pyro-metallurgical process for producing at least one non-ferrous metal or a compound thereof, wherein said metal is selected from the group consisting of arsenic (As), antimony (Sb), lead (Pb), cadmium (Cd), mercury (Hg), silver (Ag), tin (Sn), nickel (Ni), and zinc (Zn), and wherein at least one raw material is fed into a rotary kiln, wherein said at least one raw material comprises at least said metal, and wherein said raw material is heated to produce a volatized material, in which the non-ferrous metal or compound thereof is produced from the volatized material, in which process a magnesium-based additive, is additionally fed in the rotary kiln in an amount of between 0.5 wt. % and 9.5 wt. % relative to the total weight of said raw materials, which magnesium-based additive is heated together with said raw material to produce at least the volatized material and a solid product, thereby counteracting ring formation in the rotary kiln. 1. A pyro-metallurgical process for producing at least one non-ferrous metal or a compound thereof , wherein said metal is selected from the group consisting of arsenic (As) , antimony (Sb) , lead (Pb) , cadmium (Cd) , mercury (Hg) , silver (Ag) , tin (Sn) , nickel (Ni) , and zinc (Zn) , and wherein at least one raw material is fed into a rotary kiln , wherein said at least one raw material comprises at least said metal , and wherein said raw material is heated to produce a volatized material , in which the non-ferrous metal or compound thereof is produced from the volatized material , in which process a magnesium-based additive , is additionally fed in the rotary kiln in an amount of between 0.5 wt. % and 9.5 wt. % relative to the total weight of said raw materials , which magnesium-based additive is heated together with said raw material to produce at least the volatized material and a solid product , thereby counteracting ring formation in the rotary kiln.2. The process according to claim 1 , wherein the magnesium-based ...

OXYGEN INJECTION IN FLUID BED ORE CONCENTRATE ROASTING

Oxygen is injected into the windbox of a fluidized bed ore roaster to form a fluidizing and oxidizing gas stream of elevated oxygen content which is fed into only the feed zone into which the ore to be fluidized is fed. 1. A method of roasting metal-sulfidic material , comprising(A) feeding solid particulate metal-sulfidic material into a roaster having a distribution plate that supports solid particulate material fed into the roaster, wherein the material is fed into a feed zone above the distribution plate that comprises less than the entirety of the upper surface of the distribution plate, wherein the roaster includes space below the distribution plate, and wherein passages are present through the distribution plate which have inlets are open to the space and have outlets in the upper surface of the distribution plate that are in the feed zone, and wherein passages are present through the distribution plate which have inlets that are open to the space and have outlets in the upper surface of the distribution plate that are not in the feed zone;(B) feeding oxygen-containing gas into space that is under the distribution plate;(C) injecting oxygen enrichment gas whose oxygen concentration is higher than the oxygen concentration of the oxygen-containing gas into a region of said space that is under said feed zone and mixing said enrichment gas with oxygen-containing gas in said region to form oxygen-enriched oxidant gas in said region; and(D) feeding said oxygen-enriched oxidant gas from said space through passages in said distribution plate under and into the metal-sulfidic material in the feed zone while feeding said oxygen-containing gas from said space through passages in said distribution plate that are not under the feed zone.2. A method according to wherein the space under the distribution plate is free of barriers that prevent oxygen-containing gas that is fed into said space from being accessible to the inlets of all of said passages through the distribution ...

PROCESS FOR RECOVERING ZINC AND/OR ZINC OXIDE II

A process for recovering zinc from a zinc containing material, the process including the steps of: leaching the zinc containing material with an alkaline lixiviant comprising an aqueous mixture of NHand NHCl, or ionic equivalent, having a NHCl concentration of between about 10 g/L and about 150 g/L HO and a NHconcentration of between 20 g/l HO and 250 g/L HO, to produce a zinc containing leachate; stripping ammonia from the leachate to produce a stripped liquor which includes a zinc containing precipitate, the stripped liquor having a NHconcentration of between 7 and 30 g/L HO; and recovering the zinc from the stripped liquor. 1. A process for recovering zinc from a zinc containing material , the process including the steps of:{'sub': 3', '4', '4', '2', '3', '2', '2, 'leaching the zinc containing material with an alkaline lixiviant comprising an aqueous mixture of NHand NHCl, or ionic equivalent, having a NHCl concentration of between about 10 g/L and about 150 g/L HO and a NHconcentration of between 20 g/l HO and 250 g/L HO, to produce a zinc containing leachate;'}{'sub': 3', '2, 'stripping ammonia from the leachate to produce a stripped liquor which includes a zinc containing precipitate, the stripped liquor having a NHconcentration of between 7 and 30 g/L HO; and'}recovering the zinc from the stripped liquor.2. A process according to claim 1 , wherein the lixiviant has a NHCl concentration of between 20 g/L HO and 100 g/L HO.3. A process according to claim 2 , wherein the concentration of NHin the lixiviant is between 20 and 150 g/L HO.4. A process according to claim 3 , wherein the NHconcentration after stripping is about 10 g/L HO.5. A process according to claim 1 , wherein the stripped liquor has a pH greater than 7.6. A process according to claim 1 , wherein the stripping step includes an air stripping process step.7. A process according to claim 6 , wherein the air stripping process step includes at least two stripping process stages claim 6 , the air stream ...

Treated Geothermal Brine Compositions With Reduced Concentration of Silica, Iron and Lithium

This invention relates to treated geothermal brine compositions containing reduced concentrations of lithium, iron and silica compared to the untreated brines. Exemplary compositions contain concentration of lithium ranges from 0 to 200 mg/kg, concentration of silica ranges from 0 to 30 mg/kg, concentration of iron ranges from 0 to 300 mg/kg. Exemplary compositions also contain reduced concentrations of elements like arsenic, barium, and lead. 120-. (canceled)21. A treated geothermal brine composition comprising a treated geothermal brine comprising lithium , silica , iron , boron , barium , and strontium having a concentration of lithium of no more 200 mg/kg , a concentration of silica of no more than 10 mg/kg , a concentration of iron of no more than 20 mg/kg.22. The treated geothermal brine composition of claim 21 , wherein the concentration of lithium is no more than 150 mg/kg claim 21 , the concentration of silica is no more than 10 mg/kg claim 21 , the concentration of iron is less than about 20 mg/kg claim 21 , and the concentration of boron is no more than 544 mg/kg.23. The treated geothermal brine composition of claim 21 , wherein the concentration of lithium is no more than 150 mg/kg claim 21 , the concentration of silica is no more than 10 mg/kg claim 21 , the concentration of iron is less than about 20 mg/kg claim 21 , and the concentration of boron is from 100 mg/kg to 544 mg/kg.24. The treated geothermal brine composition of claim 21 , wherein the concentration of lithium is no more than 50 mg/kg claim 21 , the concentration of silica is no more than 10 mg/kg claim 21 , the concentration of iron is less than about 20 mg/kg claim 21 , and the concentration of barium is no more than 250 mg/kg.25. The treated geothermal brine composition of claim 21 , wherein the concentration of lithium is no more than 50 mg/kg claim 21 , the concentration of silica is no more than 10 mg/kg claim 21 , the concentration of iron is less than about 20 mg/kg claim 21 , and ...

Ultrasonic Probes With Gas Outlets for Degassing of Molten Metals

Ultrasonic probes containing a plurality of gas delivery channels are disclosed, as well as ultrasonic probes containing recessed areas near the tip of the probe. Ultrasonic devices containing these probes, and methods for molten metal degassing using these ultrasonic devices, also are disclosed. 1. An ultrasonic device comprising:an ultrasonic transducer;an ultrasonic probe attached to the transducer, the probe comprising a tip and two or more gas delivery channels extending through the probe; and a gas inlet,', 'gas flow paths through the gas delivery channels, and', 'gas outlets at or near the tip of the probe., 'a gas delivery system, the gas delivery system comprising2. The ultrasonic device of claim 1 , wherein the probe comprises stainless steel claim 1 , titanium claim 1 , niobium claim 1 , a ceramic claim 1 , or a combination thereof.3. The ultrasonic device of claim 1 , wherein the probe comprises a Sialon claim 1 , a Silicon carbide claim 1 , a Boron carbide claim 1 , a Boron nitride claim 1 , a Silicon nitride claim 1 , an Aluminum nitride claim 1 , an Aluminum oxide claim 1 , a Zirconia claim 1 , or a combination thereof.4. The ultrasonic device of claim 1 , wherein:the probe comprises a Sialon;the probe comprises from three to five gas delivery channels; andthe gas outlets are at the tip of the probe.5. The ultrasonic device of claim 1 , wherein the probe is a generally cylindrical elongated probe claim 1 , and a length to diameter ratio of the elongated probe is in a range from about 5:1 to about 25:1.6. The ultrasonic device of claim 1 , wherein the probe is a generally cylindrical elongated probe claim 1 , and a ratio of the cross-sectional area of the tip of the elongated probe to the cross-sectional area of the gas delivery channels is in a range from about 30:1 to about 1000:1.7. The ultrasonic device of claim 1 , wherein the ultrasonic device further comprises a booster between the transducer and the probe claim 1 , and the gas inlet is in the ...

ZINC PRODUCTION METHOD

A zinc production method includes a reaction step such as a leaching step () of bringing electric arc furnace dust () containing zinc oxide or the like into contact with a chlorine gas () to obtain a zinc oxide component in the electric arc furnace dust () or the like as crude zinc chloride (), a purification step () of heating the crude zinc chloride () obtained at the reaction step to produce zinc chloride vapor, and cooling and condensing the zinc chloride vapor, thereby obtaining purified zinc chloride (), and an electrolysis step () of electrolyzing the purified zinc chloride () obtained at the purification step () in a molten state to obtain a zinc melt () and the chlorine gas (). 1. A zinc production method comprising:a reaction step of obtaining crude zinc chloride from a zinc oxide component in electric arc furnace dust containing zinc oxide or in secondary dust generated at a time of reducing the electric arc furnace dust in a reduction furnace;a purification step of heating the crude zinc chloride obtained at the reaction step to produce zinc chloride vapor, and cooling and condensing the zinc chloride vapor, thereby obtaining purified zinc chloride; andan electrolysis step of electrolyzing the purified zinc chloride obtained at the purification step in a molten state to obtain a zinc melt and a chlorine gas.2. The zinc production method according to claim 1 , wherein the reaction step is a leaching step of bringing the electric arc furnace dust or the secondary dust into contact with a chlorine gas to extract a zinc oxide component in the electric arc furnace dust or in the secondary dust as crude zinc chloride.3. The zinc production method according to claim 2 , wherein at the leaching step claim 2 , the electric arc furnace dust or the secondary dust is brought into contact with the chlorine gas obtained by electrolysis at the electrolysis step.4. The zinc production method according to claim 2 , wherein the purification step includesa first ...

Process And System For Plasma-Induced Selective Extraction And Recovery Of Species From A Matrix

The invention relates to a process for selectively and continuously extracting a series of desired species from a matrix, comprising the steps of:—injecting a plasma () in an extraction chamber by means of a plasma torch,—continuously monitoring () the excited elements extracted from the matrix and contained in the plasma by optical emission spectroscopy, and for each species of the series,—setting a distance () between the support and the plasma torch, and the composition of the injected plasma as a function of the monitored excited elements so that only one desired species of the series of species is being extracted from the matrix under molecular form, and—providing () a plate in the extraction chamber, exterior to the plasma, causing collection of molecules comprising said desired species by deposition onto the surface of the plate. 2. The process according to claim 1 , wherein the step of adjusting the distance between the support and the plasma torch is performed by moving the support relative to the plasma torch.3. The process according to claim 1 , wherein the step of adjusting the composition of the injected plasma comprises selectively mixing claim 1 , to a plasma-producing gas claim 1 , at least one additive gas selected among the group consisting of oxygen claim 1 , hydrogen claim 1 , nitrogen claim 1 , ammonia gas claim 1 , chlorine claim 1 , fluorine claim 1 , carbon dioxide and their derivatives including nitrates and hydrocarbines.4. The process according to claim 1 , further comprising a step of setting the matrix at a determined potential related to the plasma and adjusting the said potential according to the monitored excited elements.5. The process according to claim 1 , further comprising a step of adjusting respective flows of a plasma-producing gas and an additional gas composing the injected plasma claim 1 , in order to adjust the partial pressure of the additional gas inside the extraction chamber claim 1 , according to the monitored excited ...

TREATMENT METHOD OF CHLORINE-CONTAINING ZINC OXIDE SECONDARY MATERIAL

The invention discloses a treatment method of a chlorine-containing zinc oxide secondary material, which comprises the following steps: 1) leaching the chlorine-containing zinc oxide secondary material I through an acid solution; 2) selectively extracting zinc through P204-kerosene solvent; 3) implementing stripping-electrolysis zinc recovery; 4) repeating steps 1)-4); 5) taking out the raffinate obtained from the Step (4), mixing the residual taken out raffinate with chlorine-containing zinc oxide secondary material II when balance on chlorine ion input and taking out is achieved; carrying out liquid-solid separation; leaching the separated deposit through acid raffinate of the step 1); 6) after separated solution achieves preset conditions, purifying the chlorine-containing aqueous phase; 7) evaporating and concentrating to crystallize out KCl and NaCl products. The invention is environment-friendly and energy-saving, and free from process wastewater emission; production cost is greatly reduced and secondary pollution of the current dechloridation process is eliminated thoroughly. 1. A treatment method of a chlorine-containing zinc oxide secondary material , wherein , the method comprises the following steps:(1) leaching the chlorine-containing zinc oxide secondary material I through an acid solution to obtain leaching liquor and leaching residue;{'sub': '204-', '(2) selectively extracting zinc from leaching liquor obtained from the Step (1) through Pkerosene solvent to obtain a zinc-containing organic phase as well as chlorine and acid containing raffinate;'}(3) implementing stripping-electrolysis zinc recovery to the zinc-containing organic phase obtained from the Step (2), and returning the organic phase after the stripping to the Step (2) to extract zinc;(4) taking the raffinate obtained from the Step (2) as the acid solution of the Step (1), returning to Step (1) and repeating (1)-(4);(5) taking out the raffinate obtained from the Step (4), when the chlorine ...

METHOD FOR RECYCLING VALUABLE METALS FROM SPENT BATTERIES

A process has been developed in order to recover and recycle the metals present in spent batteries, including alkaline spent batteries alone or mixed with other types of spent batteries. This method shows a good potential in terms of metals recoveries efficiencies and economic feasibility. Firstly, the spent batteries are crushed (optionally after having been frozen in the case of spent batteries of mixed types). Then, the undesirable parts (plastics, steel cases, papers, etc.) are removed by screening. The collected powder, containing the metals, is mixed with a solution of sulfuric acid in the presence of a reducing agent. The solid/liquid separation is carried out by filtration and the leachate is purified in order to selectively recover the metals. The purification steps consist of: a) recovering Zn by solvent extraction followed by an electrowinning process; b) simultaneously recovering Mn and Cd by solvent extraction process; c) selectively recovering Cd from the mixture solution of Cd and Mn by electrowinning process; d) precipitating Mn from a pure solution of MnSOin a carbonate form; e) removing the impurities present in the effluent by solvent extraction in order to obtain a pure NiSOsolution; f) precipitating Ni from a NiSOsolution in a carbonate form. 1. A process for recovering valuable metals from spent batteries comprising the steps of:a) crushing the spent batteries;b) separating debris as a coarse fraction and a fine fraction;c) leaching metals present in the fine fraction with strong inorganic acid and a reducing agent to produce an aqueous leachate;d) extracting Zn from the leachate by electrowinning to obtain a metallic deposit of Zn and a Zn-depleted aqueous solution; ande) extracting Mn from the Zn-depleted aqueous solution of d) by precipitation at pH of about 8-9 to obtain precipitated Mn and a Zn- and Mn-depleted aqueous solution.2. The process of claim 1 , wherein in the leaching step c) claim 1 , the strong inorganic acid is selected from ...

METHOD FOR RECOVERING ZINC FROM ELECTRIC FURNACE STEELMAKING DUST AND DEVICE FOR RECOVERING ZINC FROM ELECTRIC FURNACE STEELMAKING DUST

A method and a device for recovering zinc from electric furnace steelmaking dust, which are capable of recovering high-purity metal zinc for relatively short time. A Ca mixing and heating means obtains ZnO and 2CaO.FeOby mixing electric furnace steelmaking dust with calcium compound and performing heat treatment in a non-reducing atmosphere at not lower than 960° C. and not exceeding 1100° C. for one to three hours. An iron powder mixing means mixes the ZnO and 2CaO.FeOwith iron powder, and compact the mixture. A reduction and volatilization means obtains a solid metal zinc piece by disposing a green compact in a decompression container , decompressing and heating the inside of the decompression container to generate zinc vapor, and cooling and coagulating the zinc vapor. A zinc acquisition means acquires lumpy zinc by immersing the metal zinc piece in a NaCl—KCl based multi-component chloride flux and cooling the flux solution. 1. A method for recovering zinc from electric furnace steelmaking dust , comprising:{'sub': '2', 'a Ca mixing and heating step for obtaining ZnO and 2CaO.FeO3 by mixing electric furnace steelmaking dust with calcium compound containing Ca of a molar amount not less than an equivalent amount of the molar amount of Fe in the electric furnace steelmaking dust and performing heat treatment in a non-reducing atmosphere at not lower than 960° C. and not exceeding 1100° C. for one to three hours;'}{'sub': '2', 'a iron powder mixing step for mixing the ZnO and 2CaO.FeO3 obtained by the said Ca mixing and heating step with iron powder of the molar amount not less than the equivalent amount of the molar amount of the said ZnO, and compacting the mixture;'}a reduction and volatilization step for obtaining a solid zinc piece by disposing a green compact by the said iron powder mixing step in a decompression container, decompressing and heating an inside of the decompression container to generate zinc vapor, and cooling and coagulating the zinc vapor; ...

Processes for recovering non-ferrous metals from solid matrices

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.

INTEGRATED RECOVERY OF METALS FROM COMPLEX SUBSTRATES

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) ...

Method for the Treatment of Iron-Containing Sludge

The present invention provides a method for the treatment of sludge containing iron and between 4.5% to 12% by weight of zinc. This method includes a leaching step wherein leaching agents include hydrochloric acid and chlorate, and wherein the pH of the leachate directly resulting from this leaching step is set at a value below 1.5. A recycling method and treatment installation are also provided. 117-. (canceled)18. A method for the treatment of sludge containing iron and between 4.5% to 12% by weight of zinc , the method comprising the step of:leaching with leaching agents including hydrochloric acid and chlorate, a pH of leachate directly resulting from this leaching step being 1.5 or less.19. The method according to claim 18 , wherein the leachate has a pH between 0.8 and 1.5.20. The method according to claim 18 , wherein the leachate has a pH between 0.8 and 1.2.21. The method according to claim 18 , wherein the chlorate is a sodium chlorate compound.22. The method according to claim 18 , wherein the leaching step is performed at a temperature between 50 and 65° C.23. The method according to claim 18 , wherein the sludge initially contains more than 7% by weight of zinc.24. The method according to claim 18 , wherein the sludge initially contains between 1 and 2% by weight of lead.25. The method according to claim 18 , further comprising:performing at least one separation step after the leaching step, in order to separate a leached sludge from a residual liquid in the leachate.26. The method according to claim 25 , further comprising:performing an iron precipitation step after the at least one separation step to precipitate goethite.27. The method according to claim 26 , further comprising:performing a zinc and lead precipitation step after the iron precipitation step to obtain zinc and lead hydroxides.28. The method according to claim 25 , further comprising:performing a single precipitation step after the at least one separation step to obtain a concentrate of ...

Ultrasonic Probes with Gas Outlets for Degassing of Molten Metals

Ultrasonic probes containing a plurality of gas delivery channels are disclosed, as well as ultrasonic probes containing recessed areas near the tip of the probe. Ultrasonic devices containing these probes, and methods for molten metal degassing using these ultrasonic devices, also are disclosed. 125-. (canceled)26. An ultrasonic device comprising:an ultrasonic transducer;an ultrasonic probe attached to the transducer, the probe comprising a tip and two or more gas delivery channels extending through the probe; and a gas inlet,', 'gas flow paths through the gas delivery channels, and', 'gas outlets at or within about 2 cm of the tip of the probe;, 'a gas delivery system, the gas delivery system comprisingwherein the probe comprises a ceramic.27. The ultrasonic device of claim 26 , wherein the gas outlets are at or within about 1 cm of the tip of the probe.28. The ultrasonic device of claim 26 , wherein the gas outlets are at the tip of the probe.29. The ultrasonic device of claim 26 , wherein the probe comprises a Sialon claim 26 , a Silicon carbide claim 26 , a Boron carbide claim 26 , a Boron nitride claim 26 , a Silicon nitride claim 26 , an Aluminum nitride claim 26 , an Aluminum oxide claim 26 , a Zirconia claim 26 , or a combination thereof.30. The ultrasonic device of claim 26 , wherein the probe comprises a Sialon.31. The ultrasonic device of claim 30 , wherein a length to diameter ratio of the probe is in a range from about 5:1 to about 25:1.32. The ultrasonic device of claim 30 , wherein the probe comprises from two to eight gas delivery channels.33. The ultrasonic device of claim 30 , wherein a ratio of the cross-sectional area of the tip of the probe to the cross-sectional area of the gas delivery channels is in a range from about 30:1 to about 1000:1.34. The ultrasonic device of claim 26 , further comprising a booster between the transducer and the probe.35. A method for reducing an amount of a dissolved gas and/or an impurity in a molten metal bath ...

Carbothermal reduction reactor system, components thereof, and methods of using same

Methods, systems, and components suitable for carbothermal reduction processes are disclosed. Exemplary systems include a reactor, such as hybrid solarthermal-electric reactor, a solar thermal reactor, an electric reactor, or a reactor heated by gas combustion, a pellet source, a gas reactant source, and a vacuum source. The reactor can operate as a moving bed or pseudo moving bed reactor.

ZINC PRODUCTION METHOD USING ELECTRIC FURNACE DUST AS RAW MATERIAL

A zinc production method including a chlorination step at which crude zinc chloride vapor and an oxygen gas are obtained by bringing electric furnace dust containing zinc oxide or secondary dust generated at the time of reducing the electric furnace dust in a reduction furnace into contact with a mixed gas containing a chlorine gas and an oxygen-containing gas , converting a zinc oxide component in the electric furnace dust or the secondary dust into zinc chloride, and vaporizing the zinc chloride. The zinc production method further includes purification steps , and at which a zinc chloride component contained in the crude zinc chloride vapor is separated from components and other than zinc chloride contained in the crude zinc chloride vapor to obtain a purified zinc chloride melt , and an electrolysis step at which the purified zinc chloride melt is electrolyzed to obtain a zinc melt and the chlorine gas 1. A zinc production method comprising:a chlorination step of obtaining crude zinc chloride vapor by bringing electric furnace dust containing zinc oxide or secondary dust generated at a time of reducing the electric furnace dust in a reduction furnace into contact with a mixed gas containing a chlorine gas and an oxygen-containing gas, converting a zinc oxide component in the electric furnace dust or the secondary dust into zinc chloride, and vaporizing the zinc chloride;a purification step of obtaining purified zinc chloride by separating a zinc chloride component contained in the crude zinc chloride vapor from components other than zinc chloride contained in the crude zinc chloride vapor; andan electrolysis step of obtaining a zinc melt and a chlorine gas by electrolyzing a molten salt electrolytic bath in which the purified zinc chloride is melted.2. The zinc production method according to claim 1 , wherein the purification step includes a distillation purification step of obtaining the purified zinc chloride by distilling a melt containing the zinc chloride ...

RECOVERY OF ZINC FROM LEAD SLAG

A method for recovering zinc from slag derived from lead smelting comprises subjecting the slag to a leaching step under conditions in which zinc is dissolved into solution and silica present in the slag dissolves and re-precipitates in a form that is readily separable from liquid, and recovering zinc from the solution. The slag may be subjected to leaching in at least two stages in which in a first leaching stage only part of the zinc is removed from the slag and further zinc leaching from the slag occurs in a second stage to form a pregnant leaching solution and recovering zinc from the solution. The method may be used to remove SOfrom a gas stream by using the SO-containing gas stream to leach a slurry of the slag. 140-. (canceled)41. A method for recovering zinc from slag which comprises subjecting a slag derived from lead smelting to a leaching step under leaching conditions that include:(a) dissolving zinc into a leach solution; dissolving silica into the leach solution; precipitating the silica in a form that is readily separable from the leach solution, and recovering zinc from the leach solution; or(b) leaching in at least two stages in which in a first leaching stage only part of the zinc is removed from the slag and further zinc leaching from the slag occurs in a second stage to form a pregnant leaching solution and recovering zinc from the pregnant leaching solution; or(c) a leaching step under leaching conditions that include dissolving zinc into a leach solution, adding silica during the leaching step at a specific silicon addition rate of 10 g Si/L·hour or less, 5 g Si/L·hour or less, or 3.3 g Si/L·hour or less, separating solid residue from the leach solution and recovering zinc from the leach solution.42. The method of claim 41 , wherein the slag is subjected to leaching in at least two stages in which in a first leaching stage only part of the zinc is removed from the slag and further zinc leaching from the slag occurs in a second stage to form a ...

METHOD FOR LEACHING A SULPHIDIC METAL CONCENTRATE

A method for leaching a sulfidic metal concentrate in hydrometallurgical production of metal in a leaching process from which hot water vapor containing off-gas is conducted out and to which an acid solution warmed up to an elevated temperature is conducted. The acid solution is warmed up to an elevated temperature by bringing off-gas of the leaching step into direct contact with the acid solution. 1. A method for leaching a sulfidic metal concentrate in hydrometallurgical production of metal in a leaching process , from which process hot water vapor containing off-gas is conducted out and to which process an acid solution warmed up to an elevated temperature is conducted , characterized in that the acid solution is warmed up to an elevated temperature by bringing off-gas of the leaching step into direct contact with the acid solution.2. The method according to claim 1 , characterized in that the acid solution is warmed up by providing it as droplets in the hot off-gas claim 1 , the off-gas being present as a continuous phase.3. The method according to claim 2 , characterized in that the acid solution is sprayed in the off-gas through a nozzle forming droplets in a device where the off-gas and the acid solution move against the flow.4. The method according to claim 2 , characterized in that the off-gas and the acid solution are brought into mutual contact by an ejector/venturi technique.5. The method according to claim 1 , characterized in that the acid solution is warmed up by dispersing the off-gas in the acid solution claim 1 , the acid solution being present as a continuous phase.6. The method according to claim 5 , characterized in that the off-gas is dispersed in a sulfuric acid solution.7. The method according to claim 1 , characterized in that the temperature of the water vapor in the off-gas of the leaching process step is approximately 100° C.8. The method according to claim 1 , characterized in that the acid solution is warmed up to between approximately ...

DEVICE AND METHOD FOR RECOVERING A NON-FERROUS METAL FROM HOT DROSS

This invention relates to the field of recycling non-ferrous metals (for example, aluminium and alloys thereof, magnesium and zinc). The claimed device comprises: a frame with a dross compression head; an ingot mold for collecting metal compressed from the dross; a dross pot mounted on said ingot mold; at least one through opening with a connection means for supplying a vacuum, said opening being situated in the bottom part of the dross pot and/or in the ingot mold; and a seal, situated in the gap between the dross pot and the ingot mold; furthermore, one or several through drainage openings are provided in the bottom part of the dross pot. The device may comprise a seal between the dross compression head and the dross pot. The head may be provided with one or several ribs. The dross pot may be provided with one or several ribs. The head may be hollow and provided with two or more air-cooling connecting pipes. The device may comprise a cover, sealingly mounted on a rod of a hydraulic cylinder of a device for compressing hot dross such as to be capable of sliding along the rod, said cover sealingly conforming to the edges of the dross pot. The device may comprise a cover, sealingly mounted on a rod of a hydraulic cylinder of a dross press such as to be capable of sliding along the rod with the aid of pneumatic or hydraulic cylinders (1 to 4 in total), said cover sealingly conforming to the edges of the dross pot. The device may comprise a cover, sealingly mounted on a rod of a hydraulic cylinder of a dross press such as to be capable of sliding along the rod, said cover sealingly conforming to the edges of the dross pot, and at least one through opening with a connection means for supplying an inert gas. The device may comprise one or several dross pot vibrators and/or head vibrators, or magnetohydrodynamic (MHD) pumps, for moving the metal toward the one or several drainage openings in the bottom part of the dross pot. The claimed method for recovering a non-ferrous ...

Method for Producing a High-purity Nanometer Zinc Oxide from Low-grade Zinc Oxide Ore by Ammonia Decarburization

Disclosed is a method for producing a nanometer zinc oxide from low-grade zinc oxide ore by ammonia decarburization. The method comprises: taking ammonia water-ammonium bicarbonate solution as a leaching agent; adding 0.3-0.5 kg sodium fluorosilicate to per cubic meter of the leaching agent; leaching low-grade zinc oxide ore with the leaching agent; and adding 50-60 kg slaked lime to per cubic meter of leached solution to carry out decarburization treatment. The obtained nanometer zinc oxide powder has purity of 99.7% or up, uniform particle size distribution (average particle size of 10-28 nm), specific surface area of 107 m/g or up, good fluidity and good dispersity. The treatment method of the present invention is low in energy consumption and high in efficiency, and the leaching agent can be recycled. The final leached residue subject to the leaching treatment, without destruction of original mineral component phase composition, can still be used for brick making, so as to achieve dual purposes of economy and environment protection, and has a high economic value and social value. 1. A method for producing a nanometer zinc oxide from low-grade zinc oxide ore by ammonia decarburization , comprising:the low-grade zinc oxide ore being processed by leaching, purification for impurity removal, crystallization by ammonia evaporation, drying and calcinations, comprising:{'sub': 3', '3, 'sup': '2−', 'taking ammonia water-ammonium bicarbonate solution as a leaching agent in said leaching step, wherein said ammonia water-ammonium bicarbonate solution includes the molar concentration c(NH)=5.5-7 mol/L, the molar concentration c(CO)=0.95-1.2 mol/L, and 0.3-0.5 kg sodium fluorosilicate is added to per cubic meter of said leaching agent;'}{'sub': 3', '3', '3, 'sup': 2−', '3', '3', '2−', '2−, 'adjusting zinc oxide of said leached solution to 50-60 g/L, and then performing heating to reduce ammonia and decarburize and natural precipitation, including: adding 30-60 kg slaked lime ...

METHOD FOR ISOLATING VALUABLE METAL

Provided is a method that selectively extracts and, at a low cost, recovers indium from an acidic solution containing indium and gallium. The present invention is a method that is for isolating a valuable metal and that, by means of subjecting an acidic solution containing indium and gallium to a solvent extraction that is by means of an extraction agent comprising an amide derivative represented by a general formula, extracts indium from the acidic solution. In the formula, Rand Reach indicate the same or a different alkyl group, Rindicates a hydrogen atom or an alkyl group, and Rindicates a hydrogen atom or any given group, other than an amino group, bonded to the α-carbon as an amino acid. The general formula preferably has a glycine unit, a histidine unit, a lysine unit, an aspartic acid unit, or an N-methylglycine unit. 2. The method for isolating a valuable metal according to claim 1 , wherein the amide derivative is any one or more of a glycine amide derivative claim 1 , a histidine amide derivative claim 1 , a lysine amide derivative claim 1 , an aspartic acid amide derivative and a normal-methylglycine derivative.3. The method for isolating a valuable metal according to claim 2 , wherein the amide derivative is the glycine amide derivative claim 2 , andthe acidic solution is subjected to the solvent extraction with the pH of the acidic solution adjusted to a range of between 0.7 or more to 1.9 or less.4. The method for isolating a valuable metal according to claim 2 ,wherein the amide derivative is the histidine amide derivative, andthe acidic solution is subjected to the solvent extraction with the pH of the acidic solution adjusted to a range of between 0.7 or more to 3.0 or less.5. The method for isolating a valuable metal according to claim 2 ,wherein the amide derivative is the normal-methylglycine derivative, andthe acidic solution is subjected to the solvent extraction with the pH of the acidic solution adjusted to a range of between 0.7 or more to 2 ...

TREATMENT OF SULPHIDIC MATERIALS

A process for treating a mixed sulphidic material containing lead sulphide and at least one other metal sulphide. The process includes the steps of subjecting the mixed sulphidic material to selective oxidation such that lead sulphide in the material is oxidised to form an oxidised lead compound while substantial oxidation of the at least one other metal sulphide is avoided, and separating the oxidized lead compound from the at least one other metal sulphide. The oxidized lead compound may be separated by flotation wherein the oxidized lead compound reports to the tailings and the at least one other metal sulphide reports to the concentrate (froth). 1. A process for treating a mixed sulphidic material containing lead sulphide and at least one other metal sulphide , the process comprising the steps of subjecting the mixed sulphidic material to selective oxidation such that lead sulphide in the material is oxidised to form an oxidised lead compound whilst substantial oxidation of the at least one other metal sulphide is avoided , and separating the oxidized lead compound from the at least one other metal sulphide using a flotation process.2. A process as claimed in wherein the oxidised lead compound is separated from the at least one other metal sulphide by use of a flotation step wherein the oxidised lead compound reports to a tailings stream and the at least one other metal sulphide is recovered to a concentrate.3. A process as claimed in wherein the mixed sulphidic material that forms a feed material comprises a sulphide ore or a sulphide concentrate.4. A process as claimed in wherein the mixed sulphidic material contains lead sulphide claim 3 , and at least zinc sulphide and iron sulphide5. A process as claimed in wherein the mixed sulphidic material is subject to grinding prior to the selective oxidation step.6. A process as claimed in wherein the mixed sulphidic material is subjected to an ultrafine grinding process such that the ground material has a dof less ...

ROTATION-SUSPENSION SMELTING METHOD, A BURNER AND A METALLURGICAL EQUIPMENT

The invention provides a rotation-suspension smelting method, in which a powdered sulfide concentrate and an oxygen-containing gas are sprayed into a space within a high-temperature reaction tower through an equipment. The oxygen-containing gas is divided into two parts before entering the equipment: the second oxygen-containing gas is sprayed in the form of an annular direct flow into the reaction tower and forms a bell-shaped wind curtain; and the first oxygen-containing gas is transformed into a rotation-jet via the equipment and jetted into the center of the wind curtain. In the annular space between the two gas flows, the concentrate entering in a direction deviated towards the center is drawn in the rotation-jet, and a high-temperature off-gas from the bottom of the reaction tower is also sucked in, forming a gas-particle mixed two-phase rotation-jet. The sulfide concentrate is ignited by the high temperature, namely, starting a violent combustion reaction with oxygen and releasing SO-rich off-gas, at the same time, a mixed melt containing matte (or metal) and slag is formed; and the matte (or metal) is finally separated from the slag at the bottom of the reaction tower, thereby completing the metallurgical process. To achieve the process object, the invention also provides a metallurgical equipment and a rotation-suspension smelting burner thereof. 1. A rotation-suspension smelting method , wherein a dry powdered sulfide concentrate and a corresponding amount of an oxygen-containing gas are sprayed into a space within a high-temperature reaction tower , with a characteristic “wind-concentrate-wind” arrangement on the horizontal plane; wherein:the oxygen-containing gas includes the first oxygen-containing gas and the second oxygen-containing gas, in which the second oxygen-containing gas is sprayed vertically down in the form of an annular direct flow into the reaction tower, and forms a bell-shaped wind curtain that gradually expands horizontally and extends ...

PROCESS FOR THE PURIFICATION OF WASTE MATERIALS OR INDUSTRIAL BY-PRODUCTS COMPRISING CHLORINE

The present application relates to a process for the purification of waste materials or industrial by-products, the process comprising the steps of: a) Preparing a composition (C) by blending or mixing waste materials or industrial by-products comprising chlorine (B) with one or more materials comprising heavy metals (HM) b) Reacting (B) and (HM) by thermal treatment of (C) c) Separating evaporated heavy metal chloride compounds (HMCC) d) Obtaining a solid material after the thermal treatment step. 1. Process for the purification of waste materials or industrial by-products comprising chlorine (B) , the process comprising the steps of:a) Preparing a composition (C) by blending or mixing waste materials or industrial by-products comprising chlorine (B) with one or more materials comprising heavy metals (HM)b) Reacting (B) and (HM) by thermal treatment of (C)c) Separating evaporated heavy metal chloride compounds (HMCC)d) Obtaining a solid material after the thermal treatment step, the heavy metals (HM) are one or more from the following set of elements: Zn, Pb, Hg, Cu, Cd, Tl, In, Sn, Ni, Co', 'the thermal treatment is carried out at a temperature of 500-1200° C. and under a non-oxidizing atmosphere,', 'the materials comprising heavy metals (HM) and the waste materials or industrial by-products comprising chlorine (B) being mixed or blended in the presence of water, with 2-50% by mass, preferably 5-30% by mass, more preferably 10-20% by mass, of water being present in the total composition (C), and', 'the ratio of the materials comprising heavy metals (HM) and the waste materials or industrial by-products comprising chlorine (B) is chosen so that the chlorine content of the composition (C) is between 100 and 150%, preferably between 100 and 130%, most preferably between 100 and 110%, of the amount being necessary for a stoichiometric conversion of the heavy metals (HM) in the materials comprising heavy metals (HM) into chlorides, or', 'the ratio of the materials ...

Treated Geothermal Brine Compositions With Reduced Concentration of Silica, Iron and Lithium

This invention relates to treated geothermal brine compositions containing reduced concentrations of lithium, iron and silica compared to the untreated brines. Exemplary compositions contain concentration of lithium ranges from 0 to 200 mg/kg, concentration of silica ranges from 0 to 30 mg/kg, concentration of iron ranges from 0 to 300 mg/kg. Exemplary compositions also contain reduced concentrations of elements like arsenic, barium, and lead. 120-. (canceled)21. A treated geothermal brine composition comprising a treated geothermal brine comprising lithium , silica , iron , sodium , calcium , and potassium , and having a concentration of lithium of no more 30 mg/kg , a concentration of silica of no more than 20 mg/kg , a concentration of iron of no more than 20 mg/kg , a concentration of sodium ranging from 40 ,000 to 80 ,000 mg/kg , a concentration of calcium ranging from 30 ,000 to 46 ,000 mg/kg , and a concentration of potassium ranging from 10 ,000 to 26 ,000 mg/kg , wherein the geothermal brine is a Salton Sea brine.22. The treated geothermal brine composition of claim 21 , wherein the concentration of lithium is no more 15 mg/kg.23. The treated geothermal brine composition of claim 21 , wherein the concentration of lithium is no more 15 mg/kg claim 21 , the concentration of silica is no more 10 mg/kg claim 21 , and the concentration of iron is no more 10 mg/kg.24. The treated geothermal brine composition of claim 21 , wherein the concentration of lithium is no more 15 mg/kg claim 21 , the concentration of silica is no more 5 mg/kg claim 21 , and the concentration of iron is no more 5 mg/kg.25. A method of using a treated geothermal brine composition claim 21 , the method comprising extracting one or more minerals from the composition of .26. A method of using a treated geothermal brine composition claim 21 , the method comprising the step of injecting the composition of into a geothermal reservoir.27. A treated geothermal brine composition comprising a ...

METHOD FOR RECOVERING ZINC FROM SOLUTION

A method for recovering zinc from an aqueous ammoniacal ammonium carbonate zinc solution, the method comprising the steps of: Contacting the aqueous ammoniacal ammonium carbonate zinc solution with an organic solution of a zinc extractant, such that a portion of the zinc is transferred from the aqueous ammoniacal ammonium carbonate zinc solution, producing a zinc-depleted aqueous ammoniacal ammonium carbonate solution and a zinc-enriched organic solution of a zinc extractant; Separating the zinc-enriched organic solution of a zinc extractant from the zinc-depleted aqueous ammoniacal ammonium carbonate solution; Contacting the zinc-enriched organic solution with an aqueous acidic solution, producing a zinc-enriched aqueous acidic solution and a zinc-depleted organic solution of a zinc extractant; and Recovering zinc from the zinc-enriched aqueous acid solution. 1. A method for recovering zinc from an aqueous ammoniacal ammonium carbonate zinc solution , the method comprising the steps of:i. Contacting the aqueous ammoniacal ammonium carbonate zinc solution with an organic solution of a zinc extractant, such that a portion of the zinc is transferred from the aqueous ammoniacal ammonium carbonate zinc solution, producing a zinc-depleted aqueous ammoniacal ammonium carbonate solution and a zinc- enriched organic solution of a zinc extractant;ii. Separating the zinc-enriched organic solution of a zinc extractant from the zinc-depleted aqueous ammoniacal ammonium carbonate solution;iii. Contacting the zinc-enriched organic solution with an aqueous acidic solution, producing a zinc-enriched aqueous acidic solution and a zinc-depleted organic solution of a zinc extractant; andiv. Recovering zinc from the zinc-enriched aqueous acid solution.2. The method according to claim 1 , wherein the molar ratio of carbonate to zinc in the aqueous ammoniacal ammonium carbonate zinc solution is controlled to between 0.05 and 2.0.3. The method according to claim 1 , wherein a portion of ...

METHOD OF RECOVERING IRON FROM ZINC SULPHATE SOLUTION

A method of recovering iron from a zinc sulfate solution according to an embodiment of the present disclosure is associated with recovering iron from a zinc sulfate solution produced by a leaching process in which zinc ore is dissolved in sulfuric acid. The method comprises a conditioning process including a step of reducing a conditioning process input solution, which is the zinc sulfate solution, and an iron precipitation process for recovering iron as hematite, including a step of pressurizing and oxidizing an iron precipitation process input solution discharged from the conditioning process. The iron precipitation process is performed at a temperature ranging from 135° C. to 150° C. and a pressure ranging from 5 barg to 10 barg. 1. A method of recovering iron from a zinc sulfate solution produced by a leaching process in which zinc ore is dissolved in sulfuric acid , the method comprising:a conditioning process including a step of reducing a conditioning process input solution, which is the zinc sulfate solution; andan iron precipitation process for recovering iron as hematite, including a step of pressurizing and oxidizing an iron precipitation process input solution discharged from the conditioning process,wherein the iron precipitation process is performed at a temperature ranging from 135° C. to 150° C. and a pressure ranging from 5 barg to 10 barg.2. A method of recovering iron from a zinc sulfate solution produced by a leaching process in which zinc ore is dissolved in sulfuric acid , the method comprising:a conditioning process including a step of reducing a conditioning process input solution, which is the zinc sulfate solution; andan iron precipitation process for recovering iron as hematite, including a step of pressurizing and oxidizing an iron precipitation process input solution discharged from the conditioning process,wherein the iron precipitation process input solution has oxidation-reduction potential of −100 mV or less when a silver/silver ...

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

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.

Methods for removing metals and cations thereof from oil-based fluids

An effective amount of a hydrazine complexing agent and/or a non-hydrazine complexing agent may be added to an oil-based fluid having at least one metal. The complexing agent may form an insoluble metal complex with the metal(s). The metal(s) may be or include, but are not limited to zinc metal, nickel metal, iron metal, cations thereof, and combinations thereof. The insoluble metal complex may be or include, but is not limited to a zinc complex, a nickel complex, an iron complex, and combinations thereof. The insoluble metal complex may be removed from the oil-based fluid where the metal may be separated from the insoluble metal complex.

DECOATING OF COATED MATERIALS

A system and method for decoating a scrap coated metal in a leach solution uses direct measuring of the corrosion potential of the scrap metal in the system to determine the progress of the decoating process and end the process when the scrap is decoated. Corrosion potential measurements are made using a working electrode comprising more than one piece of scrap coated-metal within the system. The decoating system and method may include a system for recycling leach solution. 1. A system for decoating coated metals comprising:a reaction vessel, comprising a tank with a plurality of inlets and outlets; the tank in fluid communication witha reagent recovery unit, wherein the reagent recovery unit comprises an ionic dialysis membrane;a volt meter;a reference electrode; anda lead for working electrode.2. The system of claim 1 , wherein the metal comprises iron and the coating comprises zinc.3. The system of claim 2 , wherein the metal is steel.4. The system of claim 1 , wherein the reference electrode is an Ag/AgCl electrode.5. The system of claim 1 , wherein the working electrode is a conductive containment cage of corrosion resistant metal.6. The system of claim 5 , wherein the containment cage is in electrical communication with a scrap metal positioned within the cage.7. The system of claim 1 , wherein the working electrode is positioned within a containment cage.8. The system of claim 7 , wherein the containment cage comprises a corrosion resistant metal.9. The system of claim 8 , wherein the corrosion resistant metal is coated.10. The system of claim 9 , wherein the corrosion resistant metal is coated with a fluorine based plastic.11. The system of claim 10 , wherein the fluorine based plastic is ethylene tetrafluoroethylene claim 10 , ETFE.12. A method for decoating coated metals comprising:placing a scrap metal with a coating layer in containment cage;immersing the coated scrap in an acidic leach solution in a reaction vessel;allowing the coating layer to react ...

PROCESS FOR RECOVERING NON-FERROUS METALS FROM INDUSTRIAL MINERAL RESIDUES

A process is described for recovering a non-ferrous metal from a first solid residue comprising iron. In this process, the first solid residue is mixed with a second solid residue including sulphur, thereby obtaining a particulate mixture. The particulate mixture is subjected to a roasting step at a temperature of at least 650° C. to obtain a roasted mixture, and the roasted mixture is subjected to leaching in a liquid at a pH of at least 5.5 to obtain a solution enriched with the non-ferrous metal. 1. A process for recovering a non-ferrous metal from a first solid residue comprising iron , the process comprising:mixing the first solid residue with a second solid residue comprising sulphur thereby obtaining a particulate mixture,roasting the particulate mixture at a temperature of at least 650° C. to obtain a roasted mixture, andleaching the roasted mixture in a liquid at a pH of at least 5.5 to obtain a solution enriched with the non-ferrous metal.2. The process of claim 1 , wherein the first solid residue comprises at least 15% iron (Fe) by weight.3. The process of claim 1 , wherein the non-ferrous metal is present in the first solid residue as an iron spinel of the non-ferrous metal for at least 20% by weight.4. The process of claim 1 , wherein the non-ferrous metal is zinc.5. The process of claim 4 , wherein the first solid residue comprises at least 20% by weight zinc ferrite.6. The process of claim 1 , wherein the first solid residue is one or a combination of the following:goethite residue from metallurgical processing of zinc, Basic Oxygen Furnace dust, and Electric Arc Furnace dust.7. The process of claim 1 , wherein the second solid residue comprises at least 15% by weight sulphate mineral.8. The process of claim 1 , wherein the second solid residue is a jarosite residue from metallurgical processing of zinc.9. The process of claim 1 , wherein the second solid residue comprises the non-ferrous metal.10. The process of claim 1 , wherein the particulate ...

AUTOCLAVE AND METHOD FOR REMOVING SALT FROM AUTOCLAVE

A vertical autoclave according to an embodiment of the present disclosure is a vertical autoclave including an inlet port through which a process solution is introduced, an outlet port configured through which the process solution is discharged, an oxygen inlet port through which oxygen is supplied to the process solution, an agitator configured to mix the process solution, an inner wall, an acid-resistant brick layer lined on a lower portion and a side portion of the inner wall, and an acid-resistant metal layer lined on an upper portion of the inner wall. 1. A vertical autoclave comprising an inlet port through which a process solution is introduced , an outlet port through which the process solution is discharged , an oxygen inlet port through which oxygen is supplied to the process solution , an agitator configured to mix the process solution , an inner wall , an acid-resistant brick layer lined on a lower portion and a side portion of the inner wall , and an acid-resistant metal layer lined on an upper portion of the inner wall.2. The vertical autoclave of claim 1 , wherein the vertical autoclave has an inner diameter of 5.5 m or more.3. The vertical autoclave of claim 1 , wherein the vertical autoclave has an inner volume of 150 mor more.4. The vertical autoclave of claim 1 , wherein a volume of the process solution is 100 mor more when the vertical autoclave is operated.5. The vertical autoclave of claim 1 , further comprising a cap ring which covers an upper portion of the acid-resistant brick layer on the side portion of the inner wall.6. The vertical autoclave of claim 5 , further comprising a membrane layer provided between the inner wall and the acid-resistant brick layer claim 5 ,wherein the membrane layer is provided to extend between the upper portion of the acid-resistant brick layer and the cap ring.7. The vertical autoclave of claim 5 , further comprising a plurality of ribs which connect the cap ring and the acid-resistant metal layer.8. The ...

Solid-gas-liquid (sgl) reactor for leaching polymetal minerals and/or concentrates based on lead, copper, zinc, iron and/or the mixtures thereof

A vertical low-pressure reactor with stirred tank for leaching polymetal minerals and concentrates of lead, copper, zinc, iron and/or the mixtures thereof, in a solid-gas-liquid three-phase suspension system. The low-pressure vertical reactor with stirred tank consists of: a cylindrical vertical container with three or four deflectors evenly distributed across the 360°; a stirring system made up of two impellers coupled to a rotary shaft, that provides adequate reaction and interaction of the metal species of interest; a space of the volume of the reactor, corresponding to 20% to 35% of the total volume of the container, located at the top of the reactor and which acts as a gas chamber that provides a continuous feed of oxygen; and a system of coils placed on the outside or inside surface of the reactor to ensure efficient heat-transfer reactions and controlled kinetics.

Process for recovering components from alkaline batteries

The present invention relates to separation and recovery of metals from ground alkaline batteries using anode mud (zinc electrolysis waste) and other manganese and zinc containing materials. The material commonly referred to as alkaline black (AKB) is solubilized into sulfate media and the manganese to zinc ratio is adjusted. The solution containing metals is processed using crystallization and ion exchange methods to produce manganese sulfate and zinc sulfate solutions for several possible applications. 1. A method for recovering metals from ground alkaline batteries comprising the steps of:a. selectively leaching under reductive conditions manganese and zinc from alkaline black by mixing the alkaline black and a manganese oxide containing material and/or manganese sulfate with a sulfuric acid solution at a leaching temperature of 15-40° C., for 1-5 hours to obtain a mixture,b. filtering the mixture to obtain a manganese and zinc sulfate filtrate and a Pb/Ca/organics as a filter cake,c. heating the manganese and zinc sulfate filtrate to a crystallization temperature of 70-100° C. and keeping the crystallization temperature under reflux cooling for at least 30 minutes to precipitate manganese in a form of sulfate crystals,d. filtrating the sulfate crystals and obtaining a manganese depleted filtrate, ande. solubilizing the sulfate crystals in water to obtain a sulfate solution and separating manganese and zinc by a chelating ion exchange.2. The method for recovering according to claim 1 , wherein the manganese oxide containing material is MnO.3. The method for recovering according to claim 1 , wherein the manganese oxide containing material is manganese trioxide.4. The method for recovering according to claim 1 , wherein the manganese and zinc sulfate filtrate obtained in the filtering step (step b) has a manganese to zinc ratio between 10:1 and 3.6:1.5. The method for recovering according to claim 4 , wherein the manganese and zinc sulfate filtrate obtained in the ...

A Method of Pretreatment and Bromine Recovery of PCB Incineration Ash

A method of pretreatment and bromine recovery of PCB Incineration ash is disclosed that relates to the field of comprehensive recovery of valuable metals by full wet method, especially relates to a method of valuable metals and bromine recovery, precious metals enrichment in pretreatment process of PCB Incineration ash. The major steps includes alkali leaching, Cu extraction back-extraction, neutralization-precipitation to separate, Bromine evaporative crystallization, regeneration, acid pickling, Zn evaporative crystallization, removal of Zn and Cu. Compared with the traditional comprehensive recovery process of ash, the invention can separate bromine from ash and recover valuable metals such as copper, zinc and lead with the maximum extent, at the same time, the enrichment of silver and other precious metals is beneficial to the subsequent recovery of precious metals. It has high added recovery value and no tailless discharge. 1. A method of pretreatment and Bromine recovery of printed circuit board Incineration ash , comprising the steps of: [{'sup': '3', 'treating the printed circuit board Incineration ash with an alkali leaching solution for 1 to 2 hours, wherein the alkali leaching solution is made of a mixture of sodium hydroxide and ammonia, wherein the concentration of sodium hydroxide is 5˜20% by mass, and the concentration of ammonia is 5˜20% by mass, the solid-liquid ratio of ash to the leaching solution is 1:5˜1:10 Kg/L, the leaching temperature is 35˜55° C., meanwhile keep blowing air with agitation, wherein the blast air volume per cubic meter leaching solution is 0.01˜0.1 m/min;'}, 'stopping blowing the air and continue agitating, adding 1˜3 g copper powder into every liter of the leaching solution;', 'carrying out the reaction for 10˜30 minutes; and', 'performing filtration to obtain a mixed alkali leaching slag and a mixed alkali leaching solution;, '(1) alkali leaching, further comprising the steps of extracting copper from the mixed alkali ...

FUMING FURNACE WITH LEAD COLLECTING AND DISCHARGING FUNCTION

Disclosed is a fuming furnace with a lead collecting and discharging function, the fuming furnace comprising a furnace body; the furnace body is provided with a hearth therein and a tuyere thereon; the bottom of the hearth forms a molten pool; the furnace body is further provided with a slag discharging outlet and a lead discharging outlet thereon; the furnace body comprises a furnace bottom water jacket and a hearth water jacket; the furnace bottom water jacket is provided with a refractory brick layer at the inner wall thereof; the refractory brick layer is provided with a lead collecting and discharging channel therein for collecting and discharging lead; the lead collecting and discharging channel is in communication with the lead discharging outlet, and the lead collecting and discharging channel is in communication with the molten pool via joints between the refractory bricks forming the refractory brick layer. 1. A fuming furnace with a lead collecting and discharging function comprising:a furnace body,wherein the furnace body is provided with a hearth therein and a tuyere thereon, the hearth has a bottom forming a molten pool, the furnace body is provided with a slag discharging outlet and a lead discharging outlet, the furnace body comprises a furnace bottom water jacket and a hearth water jacket, the furnace bottom water jacket has an inner wall provided with a refractory brick layer, the refractory brick layer is provided with a lead collecting and discharging channel configured to collect and discharge lead therein, the lead collecting and discharging channel is in communication with the lead discharging outlet, and the lead collecting and discharging channel is in communication with the molten pool through joints between refractory bricks forming the refractory brick layer.2. The fuming furnace with the lead collecting and discharging function according to claim 1 , wherein the lead discharging outlet is disposed at a lower portion of an end wall of the ...

METHOD FOR EXTRACTING METALS FROM CONCENTRATED SULPHURATED MINERALS CONTAINING METALS BY DIRECT REDUCTION WITH REGENERATION AND RECYCLING OF THE REDUCING AGENT, IRON, AND OF THE FLUX, SODIUM CARBONATE

A method is disclosed for extracting metals from concentrated sulphurated minerals containing metals by direct reduction with regeneration and recycling of the reducing agent, iron, and of the flux, sodium carbonate. It is a combination of pyrometallurgical and hydrometallurgical processes which differ from the conventional processes. They do not require previous toasting of the concentrated sulphurated minerals and are technically and economically more advantageous than the presently used processes, since they directly reduce to zero the positive oxidation state of the metal, using a single reactor for extracting the metal, regenerating and recycling the metallurgical feed materials in complementary processes, the kinetics of the chemical reactions being characterised by high speed, without generating any slags or pollutant gases. The metals can be extracted at a reduced cost and in an environmentally sustainable manner 112-. (canceled)13. A process for the continuous extraction of metals from sulphurated minerals containing them , with or without associated iron , characterized by the direct reduction of the specific metal or metals to be extracted , with regeneration and recycling of iron as reducing agent , and sodium carbonate as flux , from slag and liquid and gaseous effluents derived from processes involved , in which said process includes the following steps:Extraction of metals in the smelting furnace that smelts ferrous and/or non ferrous concentrated sulphurated minerals containing the metal to be extracted, including, but not limited to, lead, silver, zinc, copper, molybdenum, antimony, arsenic, with or without iron associated and, with gold and silver inclusion in certain cases, using iron as a reducing agent of said non-ferrous metals and sodium carbonate as a flux; resulting in molten or powdery metals extracted, a controlled smooth slag consisting of ferrous oxide and sodium sulphide, and gaseous emissions of carbon dioxide.Selective dissolution in ...

ISOTOPE DISPLACEMENT REFINING PROCESS FOR PRODUCING LOW ALPHA MATERIALS

A method for removing lead-210 (Pb) from a metal, the method comprising determining a Pb concentration in a metal to be refined; determining an amount of low alpha lead to be added to the metal to be refined from the Pb concentration, the low alpha lead having a Pb concentration below that of the metal to be refined; forming a doped metal mixture by adding the low alpha lead to the metal to be refined; refining the doped metal mixture to separate at least a portion of the lead in the doped metal mixture to form a refined metal having a Pb concentration lower than that of the metal to be refined. 1. A method for removing lead-210 (Pb) from a metal material , the method comprising:{'sup': '210', 'determining a Pb concentration in a metal material to be refined;'}{'sup': 210', '210, 'determining an amount of low alpha lead to be added to the metal material to be refined from the Pb concentration, the low alpha lead having a Pb concentration below that of the metal material to be refined;'}forming a doped metal mixture by adding the low alpha lead to the metal material to be refined;{'sup': '210', 'refining the doped metal mixture to separate at least a portion of the lead from the doped metal mixture to form a refined metal having a Pb concentration lower than that of the metal material to be refined.'}2. The method of claim 1 , wherein the metal material to be refined comprises tin.3. The method of claim 1 , wherein the metal material to be refined includes at least one member selected from the group consisting of tin claim 1 , lead claim 1 , copper claim 1 , aluminum claim 1 , bismuth claim 1 , silver claim 1 , indium claim 1 , antimony claim 1 , selenium claim 1 , gallium claim 1 , thallium claim 1 , zinc claim 1 , and nickel claim 1 , and alloys and combinations thereof.4. The method of claim 1 , wherein the refining step includes maintaining the doped metal mixture in a molten state within an atmosphere having a lower pressure than atmospheric and separating the ...

PROCESS FOR RECOVERING VALUE METALS FROM ORE

This invention relates to a process for recovering valuable metals from ore with significantly reduced water consumption through the discrete treatment and storage of coarse tailings. Ore is ground to produce a coarse particulate ore. The coarse particulate ore is treated in a coarse flotation stage to produce a low grade concentrate fraction and a coarse tailings fraction. The low grade concentrate fraction is treated to produce fine tailings and a saleable concentrate. The coarse tailings are treated separately from the fine tailings and water is recovered from the coarse tailings by hydraulically stacking; filtering or screening, whereafter the coarse tailings are dry stacked, without being recombined with the fine tailings. 1. A process for recovering value metals from ore , including the steps of:grinding the ore to produce a coarse particulate ore with a particle size p80 of greater than 150 μm up to 1000 μm;treating the coarse particulate ore in a coarse flotation stage to produce a concentrate fraction, and a coarse tailings fraction with a particle size p80 of greater than 150 μm up to 1000 μm; andmilling the concentrate fraction to produce a milled concentrate, and treating the milled concentrate in a secondary flotation stage to produce a secondary concentrate fraction and a fine tailings fraction; wherein:coarse tailings from the coarse tailings fraction are treated and/or stored separately from the fine tailings fraction or any other fine tailings.2. The process claimed in claim 1 , wherein the coarse tailings from the coarse tailings fraction are dry stacked.3. The process claimed in claim 2 , wherein water is removed from the coarse tailings from the coarse tailings fraction by hydraulically stacking; filtering or screening.4. The process claimed in claim 1 , wherein coarse tailings from the coarse tailings fraction are not combined with fine tailings claim 1 , nor passed through a concentrator.5. The process claimed in claim 1 , wherein the ore is ...

METHOD OF RECOVERY OF ZINC AND OTHER METALS FROM METALLURGICAL FINES

A method and recovering method of recovering zinc oxides and other metal oxides having an injection chamber where a mixture of natural gas and oxygen is formed and then ignited to form high temperature combustion gases of greater than 2000° C. with a high concentration of carbon monoxide. Then, the mixture is transported through a quiescent chamber to a feed chamber where the ignited high temperature combustion gases are mixed with finely divided material, including EAF dust. The mixture is transported to a reaction chamber, wherein zinc vapor and other metal vapors and molten slag particles are formed. The zinc vapor and other metal vapors are separated from the molten slag particles and transported to an insulated plenum. Zinc vapor and other metal vapors are mixed with air and become airborne zinc oxide and other metal oxides. The airborne zinc oxide and other metal oxides are collected. 1. A method of recovering zinc oxide and other metal oxides from metallurgical fines , comprising:a. forming in an injection chamber a mixture of natural gas and oxygen and then igniting the mixture to form high temperature combustion gases of greater than 2000° C. with a high concentration of carbon monoxide;b. transporting the ignited high temperature combustion gases through a quiescent chamber surrounded by a cooling jacket and located below the injection chamber;c. transporting the ignited high temperature combustion gases from the quiescent chamber to a feed chamber surrounded by a cooling jacket and located below the quiescent chamber;d. forming in the feed chamber a mixture of the ignited high temperature combustion gases with injected finely divided material including EAF dust;e. transporting the mixture of the ignited high temperature combustion gases with injected finely divided material including EAF dust to a reaction chamber surrounded by a cooling jacket, wherein carbon monoxide in the ignited high temperature combustion gases react with metal compounds in the ...

System and method for parallel solution extraction of one or more metal values from metal-bearing materials

The present disclosure relates to a process and system for recovery of one or more metal values using solution extraction techniques and to a system for metal value recovery. In an exemplary embodiment, the solution extraction system comprises a first solution extraction circuit and a second solution extraction circuit. A first metal-bearing solution is provided to the first and second circuit, and a second metal-bearing solution is provided to the first circuit. The first circuit produces a first rich electrolyte solution, which can be forwarded to primary metal value recovery, and a low-grade raffinate, which is forwarded to secondary metal value recovery. The second circuit produces a second rich electrolyte solution, which is also forwarded to primary metal value recovery. The first and second solution extraction circuits have independent organic phases and each circuit can operate independently of the other circuit.

Method for the Wet Chemical Polishing of Molded Zinc Parts

A method for the wet-chemical polishing of molded zinc parts, the molded parts being brought in contact with an acid solution and said acid solution containing only sulfuric acid and phosphoric acid as the strong acids. 1. A method for the wet chemical polishing of a molded part made of zinc , comprising: bringing the molded part into contact with an acid solution , wherein the acid solution contains only sulfuric acid and phosphoric acid as the strong acids , and the total acid concentration of the strong acids is in a range of 40 to 90% by weight , wherein the acid solution contains no chromic acid/chromates , no nitric acid/nitrates , no hydrofluoric acid/fluorides , and no hydrochloric acid/chlorides , and wherein the acid solution additionally contains an oxidizing agent.2. The method according to claim 1 , wherein the molded part is treated with the acid solution until the average roughness value Rhas been reduced at least by 30% claim 1 , based on the original Rvalue.3. The method according to claim 1 , wherein the ratio (% by weight) of phosphoric acid to sulfuric acid in the acid solution is in a range of 30%:70% to 70%:30%.4. The method according to claim 1 , wherein the oxidizing agent is selected from the group consisting of persulfates claim 1 , perchlorates claim 1 , and peroxides.5. The method according to claim 1 , wherein the oxidizing agent is present in a concentration of 1% to 20% by weight.6. The method according to claim 1 , wherein the solution additionally contains surface-active substances.7. The method according to claim 1 , wherein the contact time between the acid solution and the molded part is up to 20 minutes.8. The method according to claim 1 , wherein the method is carried out at a temperature in a range of 15° C. to 60° C.9. The method according to claim 8 , wherein the temperature is in a range of 30° C. to 40° C.10. The method according to claim 2 , wherein the ratio (% by weight) of phosphoric acid to sulfuric acid in the acid ...

Method for Recovery of Metals from Sulfide Ores

A process for bio-oxidation of sulfides in mineral ore having a metal such as gold occluded or dispersed within the ore as a sulfide is disclosed. The first step comminutes the ore into particles with a size distribution having a P80 of less than 0.25 inch with minus 106 micron particles in the range of 15% to 40% by weight. Agglomerates are formed by adding to the comminuted ore particles an acidic inoculate solution including water, with the solution further including microorganisms capable of bio-oxidizing the sulfides. The agglomerates are then placed in at least one bio-reactor containment vessel to form an ore bed. The process continues by bio-oxidizing the sulfides in the ore bed; then re-circulating the solution through the ore bed, and continuing the bio-oxidation until a desired bio-oxidation level is achieved. Thereafter, the metal is recovered from the ore.

ENERGY EFFICIENT SALT-FREE RECOVERY OF METAL FROM DROSS

A process and an apparatus are disclosed for improved recovery of metal from hot and cold dross, wherein a dross-treating furnace is provided with a filling material with good capacity to store heat. This filling material is preheated to a desired temperature by injection of an oxidizing gas to burn non-recoverable metal remaining in the filling material after tapping of the recoverable metal contained in the dross and discharging of the treatment residue. When dross is treated in such furnace, the heat emanating by conduction from the filling material is sufficient to melt and separate the recoverable metal contained in the dross, without addition of an external heat source, such as fuel or gas burners, plasma torches or electric arcs and without use of any salt fluxes. Furthermore, the recovered metal being in the molten state can be fed to the molten metal holding furnace without cooling the melt; in addition, the non-use of fluxing salt for the treatment means that the non-contaminated residue can be used as a cover for the electrolytic cells in the case of aluminum. In the case of zinc dross, the residue is a valuable zinc oxide by-product very low in contaminants. 131.-. (canceled)32. A process for treating dross containing a recoverable metal , in order to recover said metal , comprising:(a) charging a batch of dross into a furnace containing a filling material preheated to a sufficient temperature to insure that said dross is thereby heated above the melting point of the metal to be recovered by transfer of energy stored in the filling material;(b) providing an inert atmosphere in the furnace by filling the furnace with inert gas, to prevent oxidation of the dross during the process;(c) rotating or oscillating the dross within the furnace to ensure proper transfer of heat between the filling material and the dross and heating of the dross to a temperature above the melting point of the recoverable metal, a separation thereof from the dross residue and from ...

SYSTEM AND METHOD FOR PARALLEL SOLUTION EXTRACTION OF ONE OR MORE METAL VALUES FROM METAL-BEARING MATERIALS

The present disclosure relates to a process and system for recovery of one or more metal values using solution extraction techniques and to a system for metal value recovery. In an exemplary embodiment, the solution extraction system comprises a first solution extraction circuit and a second solution extraction circuit. A first metal-bearing solution is provided to the first and second circuit, and a second metal-bearing solution is provided to the first circuit. The first circuit produces a first rich electrolyte solution, which can be forwarded to primary metal value recovery, and a low-grade raffinate, which is forwarded to secondary metal value recovery. The second circuit produces a second rich electrolyte solution, which is also forwarded to primary metal value recovery. The first and second solution extraction circuits have independent organic phases and each circuit can operate independently of the other circuit. 1. (canceled)2. A process comprising:feeding a first metal-bearing solution to a first solution extraction circuit and a second solution extraction circuit;feeding a second metal-bearing solution to the first solution extraction circuit;producing a low-grade raffinate from the first solution extraction circuit; andsubjecting the low-grade raffinate to a selective precipitation process to precipitate a metal ion.3. The process of claim 2 , wherein the metal ion is uranium.4. The process of claim 3 , wherein the low-grade raffinate comprises a secondary metal value.5. The process of claim 4 , wherein the secondary metal value is cobalt.6. The process of claim 3 , wherein the uranium precipitates as a solid and further comprising recycling the solid to a reactive process.7. The process of claim 4 , wherein the subjecting the low-grade raffinate to the selective precipitation process yields an electrolyte containing a secondary metal value.8. The process of claim 7 , further comprising forwarding the electrolyte to a secondary metal recovery process.9. ...

Environmentally-Friendly Compositions and Methods for Extracting Minerals and Metals from Ore

The subject invention provides safe, environmentally-friendly, compositions and methods for extracting minerals and/or metals from ore. More specifically, the subject invention provides for bioleaching using a composition comprising one or more biosurfactant-producing microorganisms and/or microbial growth by-products. In specific embodiments, the composition comprises biosurfactant-producing yeasts and/or their growth by-products. 1. A biological leaching reagent comprising one or more microorganisms and/or microbial growth by-products , wherein at least one of the microorganisms is a biosurfactant-producing yeast.2Starmerella bombicola.. The biological leaching reagent of claim 1 , wherein the biosurfactant-producing yeast is3S. bombicola. The biological leaching reagent of claim 2 , comprising yeast cell biomass and biosurfactants in fermentation medium.4. The biological leaching reagent of claim 1 , wherein the growth by-products are selected from biosurfactants claim 1 , enzymes claim 1 , proteins claim 1 , peptides claim 1 , amino acids and solvents.5. The biological leaching reagent of claim 1 , wherein the growth by-products are biosurfactants selected from glycolipids claim 1 , cellobiose lipids claim 1 , lipopeptides claim 1 , flavolipids claim 1 , phospholipids claim 1 , lipoproteins claim 1 , lipopolysaccharide-protein complexes claim 1 , and polysaccharide-protein-fatty acid complexes.6. The biological leaching reagent of claim 5 , wherein the biosurfactants comprise glycolipids and/or lipopeptides.7. The biological leaching reagent of claim 1 , enhanced by an additional yeast or bacterial culture claim 1 , wherein the additional yeast or bacterial culture comprises a biosurfactant-producing yeast or bacteria.8Wickerhamomyces anomalus, Saccharomyces cerevisiae, Pseudozyma aphidis, Pichia guilliermondii, Bacillus subtilis, Bacillus amyliliquefaciens, Bacillus licheniformisPseudomonas aeruginosa.. The method of claim 7 , wherein the additional yeast or ...

METHOD FOR RECOVERY OF COPPER AND ZINC

The present invention provides a method of recovering copper and zinc from an aqueous sulfate and chloride containing solution. In the first process step zinc and copper are simultaneous extracting with an extraction solution comprising a liquid chelating cation exchanger and a liquid anion exchanger. The extraction is followed by consecutive stripping stages. First the anionic species are washed from the organic phase with one or more aqueous solutions and finally the copper is stripped with an aqueous acidic solution. 1. A method of recovering copper and zinc from an aqueous sulfate and chloride containing solution , comprising the steps of:(a) providing an aqueous sulfate and chloride containing solution comprising copper and zinc;(b) extracting the aqueous sulfate and chloride containing solution with an extraction solution comprising a liquid chelating cation exchanger and a liquid anion exchanger to obtain a loaded organic phase comprising zinc and copper and a first aqueous phase;(c) washing zinc from the loaded organic phase with an aqueous solution to obtain a zinc-depleted organic phase and zinc and chloride containing second aqueous phase;(d) stripping copper from the zinc-depleted organic phase with an aqueous acidic solution to obtain a zinc and copper depleted organic phase and a copper-containing third aqueous phase;(e) recovering zinc from the zinc and chloride containing second aqueous phase and recovering copper from the copper containing third aqueous phase.2. The method as claimed in claim 1 , wherein the chloride concentration of the aqueous sulfate and chloride containing solution comprising copper and zinc is from 1 to 175 g/L.3. The method as claimed in claim 1 , wherein the sulfate concentration of the aqueous sulfate and chloride containing solution comprising copper and zinc is from 40 to 300 g/L.4. The method as claimed in claim 1 , wherein the liquid chelating cation exchanger is hydroxyoxime.5. The method as claimed in claim 4 , wherein ...

CHEMICAL PROCESS FOR THE RECOVERY OF ALKALINE AND ZINC-CARBON BATTERY COMPONENTS

A process is described for the recovery of the chemical components of the “black paste” resulting from the opening of dead alkaline and zinc-carbon batteries. 1. A process of chemical treatment of black paste resulting from opening alkaline or zinc-carbon batteries or mixtures thereof , comprising the following steps:a) cutting zinc-carbon or alkaline batteries or mixtures thereof, with selective dry extraction of black paste;b) washing the black paste with water to separate the potassium hydroxide of the alkaline batteries and the ammonium chloride of zinc-carbon batteries in the form of a solution, and recovering the black paste fraction that is insoluble in water;c) treatment of the wet black paste resulting from step b) with an aqueous solution of sulfuric acid, achieving the solubilisation of metallic zinc and of its compounds and of manganese compounds, and the salification of the residual potassium hydroxide with the formation of potassium sulfate;d) separating the insoluble residue of black paste consisting of manganese dioxide and carbon from the sulfuric solution;e) treating the sulfuric solution obtained in step d) with oxalic acid in sub-stoichiometric amounts compared to zinc, obtaining the precipitation of zinc oxalate;f) separation of zinc oxalate from the sulfuric solution;{'sub': '2', 'g) electrolysis of the acid solution with formation of MnOat the anode.'}2. The process according to claim 1 , wherein in step b) claim 1 , 500 to 1000 liters of water claim 1 , preferably 700 to 800 liters of water claim 1 , are used per 100 kg of black paste.3. The process according to claim 1 , wherein claim 1 , per 100 kg of starting black paste claim 1 , in step c) claim 1 , 1200 to 2000 liters are used claim 1 , preferably about 1500 liters claim 1 , of an aqueous solution of sulfuric acid having a concentration of between 5 and 15% by weight claim 1 , preferably of about 8% by weight.4. The process according to claim 1 , further comprising a further step b′) ...

METHOD OF EXTRACTING METALS FROM POLYMETALLIC SULPHIDE ORES OR CONCENTRATES

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 ...

A METHOD OF RECOVERING BROMIDE FROM BROMINE-CONTAINING SMELTING ASH

A method of recovering bromide from bromine-containing smelting ash relates to the field of high efficient separation and recovery of bromine by total wet method. It especially relates to the method of high efficiency separation of bromine salt and lead, zinc recovery of circuit board smelting ash by two-step method. It mainly comprising: sub-molten salt leaching, washing, separate Lead and zinc by adjusting the pH of industrial sulfuric acid, membrane separation and concentration, reuse of water, crude bromine salt recovery by evaporation crystallization of bromine salt. Compared with the traditional baking and recycling process of ash, the invention adopts sodium hydroxide submolten salt leaching technology and membrane separation and concentration technology, to reduce the reaction temperature and tailings discharge greatly, which has a good effect of energy saving and emission reduction. 1. A method of recovering bromide from bromine-containing smelting ash comprising:(1) leaching by sub-molten salt method: smelting ash containing bromine and sodium hydroxide is leached by sub-molten salt method in a sodium hydroxide system, leaching liquid and residue are obtained;(2) washing: wash the leaching residue obtained in step (1), a solid-to-liquid ratio of leaching residue:water is 1:5 to 1:10 Kg/L, water is at room temperature, washing liquid and washing residue are obtained, the washing residue is collected and treated;(3) separation of lead and zinc: merge the leaching liquid obtained in step (1) with the washing liquid obtained in step (2) to obtain a mixture, a volume ratio of leaching liquid:washing liquid is 1:3 to 3:1, add 98% industrial concentrated sulfuric acid to the mixture until the pH of the mixture reaches 6.5-8, lead-zinc separation residue and lead-zinc separation liquid are obtained;(4) membrane separation concentration: the lead-zinc separation liquid obtained in step (3) is separated and concentrated by reverse osmosis membrane to obtain ...

Treated Geothermal Brine Compositions With Reduced Concentrations Of Silica, Iron and Manganese

This invention relates to treated geothermal brine compositions containing reduced concentrations of iron, silica, and manganese compared to the untreated brines. Exemplary compositions contain a concentration of manganese less than 10 mg/kg, a concentration of silica ranging from less than 10 mg/kg, and a concentration of iron less than 10 mg/kg, and the treated geothermal brine is derived from a Salton Sea geothermal reservoir. 120-. (canceled)21. An aqueous treated geothermal brine composition , the composition comprising dissolved manganese , dissolved silica , and dissolved iron , wherein the dissolved manganese has a concentration greater than zero and no more than 200 mg/kg , the dissolved silica has a concentration of 0 mg/kg to 80 mg/kg , and the dissolved iron has a concentration of 0 mg/kg to 300 mg/kg.22. The aqueous treated geothermal brine composition of claim 21 , wherein the concentration of the dissolved manganese is no more than 200 mg/kg claim 21 , the concentration of the dissolved silica is no more than 30 mg/kg claim 21 , and the concentration of the dissolved iron is no more than 300 mg/kg.23. The aqueous treated geothermal brine composition of claim 21 , wherein the concentration of the dissolved manganese is less than 100 mg/kg claim 21 , the concentration of the dissolved silica is less than 30 mg/kg claim 21 , and the concentration of the dissolved iron is less than 300 mg/kg.24. The aqueous treated geothermal brine composition of claim 21 , wherein the concentration of the dissolved manganese is less than 50 mg/kg claim 21 , the concentration of the dissolved silica is less than 30 mg/kg claim 21 , and the concentration of the dissolved iron is less than 300 mg/kg.25. The aqueous treated geothermal brine composition of claim 21 , wherein the concentration of the dissolved manganese is less than 20 mg/kg claim 21 , the concentration of the dissolved silica is less than 20 mg/kg claim 21 , and the concentration of the dissolved iron is less ...

Process for the acid digestion of metal-containing compounds

The present invention relates to a process for the acid digestion of metal-containing compounds by leaching by means of an aqueous leachant, wherein the aqueous leachant i) contains an alkanesulphonic acid and, if appropriate, sulphuric acid and/or surfactant and/or ii) a mixture of an alkanesulphonic acid salt and sulphuric acid and also, if appropriate, surfactant. Furthermore, an aqueous leachant containing one or more alkanesulphonic acids and, if appropriate, sulphuric acid and/or surfactant and also an aqueous leachant containing one or more alkanesulphonic acid salts and sulphuric acid and, if appropriate, surfactant are also provided by the present invention.

一种用于硫酸锌浸出液净化除铜的方法

一种用于硫酸锌浸出液净化除铜的方法，将镀锡铜废碎料加入到硫酸锌浸出液中，反应完毕后，固液分离，获得浸出渣、浸出液和置换渣；向浸出液中鼓入空气或氧气，使得Sn 2+ 被氧化成Sn 4+ ；再调节浸出液的pH值至4.5‑5，使得浸出液中的Sn 4+ 转化为沉淀物，然后进行固液分离，获得除铜后液和含锡滤渣。本发明中镀锡铜废碎料取自“城市矿产”或电子垃圾等固废，直接用于硫酸锌浸出液净化除铜、锑、铁、砷，所得产物（滤渣）之一是海绵铜，可直接用于铜电解配液或铜的火法冶金，资源、环境及经济效益明显。

Method for improving sulphidic concentrate leaching

The invention relates to a method for improving the leaching of a sulphidic concentrate that contains valuable metals in a hydrometallurgical fabrication process of said valuable metal. The purpose is to accelerate the oxidation of sulphidic sulphur during leaching and thus the dissolving of the valuable metal. In order to achieve this, at least some of the solution formed in leaching containing divalent iron is oxidised in a separate, tube-like oxidation reactor equipped with static mixers to form trivalent iron. The invention is particularly suitable for the hydrometallurgical fabrication method of zinc, in which the raw material is zinc concentrate and the zinc concentrate is leached directly without roasting.

CEMENTING PROCESS, REACTOR FOR CARRYING OUT SAID METHOD AND INSTALLATION COMPRISING SUCH A REACTOR

Metal cementation process for metal-containing solution purification comprises ultrasonic treatment of fluidized bed of cementing particles and metal-containing solution

A metal cementation process comprises forming a fluidized bed of the cementing particles and subjecting a metal-containing solution and the particles (20) to ultrasound over a substantial portion of the active fluidized bed height. Independent claims are also included for: (i) a cementation reactor having a reaction zone equipped with a system (12) for creating a fluidized bed (LF) of the cementing particles (20) and an ultrasound generating system (24) extending over a substantial portion of the fluidized bed creation system (12); and (ii) a metal solution purification installation comprising the above cementation reactor (8) connected to a solution source (2) and a separation unit (18) for separating the cement (30) from the purified solution.

Plasma induced fuming

A method for recovery of evaporable substances comprises melting (210) of a material comprising evaporable metals and/or evaporable metal compounds into a molten slag. The molten slag is agitated (212) by a submerged jet of hot gas. The hot gas is controlled (214) to have an enthalpy of at least 200 MJ/kmol, and preferably at least 300 MJ/kmol. At least a part of the evaporable metals and/or evaporable metal compounds are fumed off (216) from the molten slag. An arrangement for the method is based on a furnace with a plasma torch submerged into molten slag in the furnace.

SYSTEM AND METHOD FOR RECOVERING CONSTITUENTS FROM BATTERIES

An apparatus, method and system are provided to recover constituent components from single use batteries. In particular, the apparatus, method and system may be used to recover zinc and manganese in the form of sulfates from depleted commercial which in turn may be subsequently used for other applications, such as micronutrients and fertilizers. 1. An apparatus comprising:a first leach chamber to treat a slurry with a first acid and a first oxidizing agent to form a first solution including first metal ions and second metal ions;a precipitation reactor to receive the first solution from the first leach chamber, wherein the first solution is to be reacted with a first metal oxide and ozone to form a precipitate, wherein the precipitate is to be separated from a portion of the first metal ions remaining dissolved;a first crystallization chamber to crystallize the portion of the first metal ions for collection;a second leach chamber to receive the slurry after treatment by the first leach chamber and the precipitate, wherein the second leach chamber is to treat the precipitate with a second acid and a second oxidizing agent to form a second solution including the first metal ions and the second metal ions;a cementation chamber to receive the second solution from the second leach chamber, wherein the second solution is to be reacted with a reducing agent to form a first metal, wherein the first metal is to be delivered to the first leach chamber; anda second crystallization chamber to crystallize the second metal ions in the second solution for collection.2. The apparatus of claim 1 , wherein the first metal ions are zinc ions and the first crystallization chamber is to form a zinc sulfate hydrate.3. The apparatus of claim 1 , wherein the second metal ions are manganese ions and the second crystallization chamber is to form a manganese sulfate hydrate.4. The apparatus of claim 1 , wherein said reducing agent is a metal powder.5. A method comprising:treating a slurry ...

一种从高炉布袋除尘灰中提取碳、铁、锌的方法

本发明公开一种从高炉布袋除尘灰中提取碳、铁、锌的加工利用方法：1，所述高炉布袋除尘灰经过磨矿作业得到细粒级产品去步骤2；2，细粒级产品经粗选作业得粗选精矿和粗选尾矿，粗选精矿去步骤3，粗选尾矿去步骤4；3，粗选精矿经一次精选，得第一粗精矿和第一尾矿；第一粗精矿去二次精选得第二粗精矿和第二尾矿，第二粗精矿得再生碳粉；第一尾矿回步骤2，第二尾矿回一次精选；4，粗选尾矿经一次扫选得第一扫选粗精矿和第一扫选尾矿；第一扫选尾矿经二次扫选作业得第二扫选粗精矿和第二扫选尾矿，第二扫选尾矿去步骤5；第一扫选粗精矿回一次精选作业，第二扫选粗精矿回一次扫选作业；步骤5，第二扫选尾矿经重选后得铁精矿和富锌料。