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.

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; ...

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 ...

TANTALUM-MATERIAL MULTILEVEL DISTILLATION CRUCIBLE AND DISTILLATION PROCESS

A tantalum-material multilevel distillation crucible; the distillation crucible comprises a crucible body (), an insulation plate (), and a receiving hood (); the insulation plate () is sheathed in the upper part of the crucible body (), and the receiving cover is disposed on top of the crucible body () and above the insulation plate (); the crucible body () is made of tantalum in a horn-shaped circular truncated cone increasing in size from top to bottom; and the insulation plate () is made of a high-temperature resistant refractory material with good insulation performance, characterized by: the insulation plate () comprises of a plurality of insulation plates that can be stacked and used (); and a heating unit () provided with a plurality of pads () that can be stacked and used at the bottom of the crucible. According to the present invention, the height of a crucible buried in a heat source can be adjusted, enabling one crucible to be used for distillation of various kinds of rare earth metals. 1. A multilevel distillation crucible made of tantalum material , in which said distillation crucible comprises a crucible body , a heat-insulation plate and a receiving hood; said heat-insulation plate is fitted around the upper end of the crucible body , while the receiving hood is provided at the top of said crucible body , located above the heat-insulation plate; said crucible body is made of tantalum with a shape of trumpet-like truncated cone with a smaller top and a larger bottom; said heat-insulation plate is made of a refractory material with high-temperature resistance and good heat-insulating properties , characterized in that ,said heat-insulation plate includes a plurality of heat-insulation plates which can be stacked for use; andseveral spacer sheets or pads which can be stacked for use at the bottom of the crucible are provided within a heat resource.2. The multilevel distillation crucible made of tantalum material according to claim 1 , characterized in ...

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 ...

METHOD FOR RECOVERING VALUABLE METALS FROM SLAG AND APPARATUS FOR MANUFACTURING MULTIFUNCTIONAL AGGREGATE

An apparatus for recovering valuable metals and manufacturing multifunctional aggregate from slag. The apparatus includes a slag reforming processing pot in which molten slag discharged from a converter or an electric furnace is stored, a reducing agent introducing part which introduces a reducing agent into the slag reforming processing pot from above, the reducing agent recovering valuable metals from the molten slag, a reducing agent inflow part which inputs a reducing agent into the slag reforming processing pot through a lower portion of a side of the slag reforming processing pot, the reducing agent recovering valuable metals from the molten slag, and cooling units and which create bubbles and perform controlled cooling in order to convert the molten slag, from which the valuable metals are recovered, into a light material having a porous structure. 1. An apparatus for recovering valuable metals and manufacturing multifunctional aggregate from slag , comprising:a slag reforming processing pot in which molten slag discharged from a converter or an electric furnace is stored;a reducing agent introducing part that introduces a reducing agent into the slag reforming processing pot, wherein the reducing agent recovers valuable metals from a molten slag;a reducing agent inflow part that inputs the reducing agent into the slag reforming processing pot via a lower portion of a side of the slag reforming processing pot, wherein the reducing agent recovers valuable metals from the molten slag; anda cooling unit configured to create bubbles and cool the molten slag to convert the molten slag into a material having a porous structure.2. The apparatus according to claim 1 , wherein the reducing agent introducing part includes:a hopper in which the reducing agent is stored;a lance pipe that extends from the hopper into the slag reforming processing pot to inject the reducing agent into the slag reforming processing pot; andan inflow controller configured to calculate an ...

METHOD AND DEVICE FOR PROCESSING FLUE DUST

The method and the device serve to treat the flue dust formed during the production of nonferrous metals. After the addition of sulfur and/or a sulfur compound, the flue dust is heated, and volatile compounds are separated in a downstream offgas treatment unit. The flue dust is heated in an inert atmosphere. 1. A method for processing flue dust formed during production of copper based on a smelting process of copper ores , the method comprising the steps of: adding sulfur and/or a sulfur compound to the flue dust; heating the flue dust in an inert atmosphere after the addition of the sulfur and/or sulfur compound; and separating volatile components , the flue dust being subjected to a pyrometallurgical treatment in a fluidized bed reactor in which the flue dust is heated in an inert atmosphere , the pyrometallurgical treatment producing an offgas that is subjected to an offgas treatment for removing arsenic-sulfur compounds as volatile elements , wherein treatment of the flue gas is carried out as a continuous process.2. The method according to claim 1 , including volatilizing arsenic in elementary form or in form of arsenic-sulfur compounds and then separating the arsenic or arsenic-sulfur compound from the flue dust.3. The method according to claim 1 , including processing the flue dust at ambient pressure.4. The method according to claim 1 , including carrying out the treatment of the flue dust at a negative pressure.5. The method according to claim 1 , including carrying out the treatment of the flue at a positive pressure.6. The method according to claim 1 , wherein an average amount of sulfur dioxide in the offgas is no greater than 5 vol. %.7. The method according to claim 1 , wherein the heating of the flue dust includes heating the flue dust at least temporarily to a temperature in the range of 500-1 claim 1 ,000° C. The present application is a Divisional application of U.S. patent application Ser. No. 13/583,832, filed Oct. 23, 2012, which is a 371 of ...

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 ...

PROCESSES FOR THE SEPARATION OF ORES

Methods for purifying one or more value materials are provided. The method can include contacting an aqueous mixture comprising a value material and a contaminant with a dispersant and a depressant to produce a treated mixture. A weight ratio of the dispersant to the depressant can be from about 1:1 to about 30:1. The method can also include recovering a purified product comprising the value material from the treated mixture. The purified product can have a reduced concentration of the contaminant relative to the aqueous slurry. 1. A method for purifying a value material , comprising: the dispersant comprises silica, a silicate, a polysiloxane, a starch, a modified starch, a gum, a tannin, a lignosulphonate, carboxyl methyl cellulose, a cyanide salt, a polyacrylic acid based polymer, a naphthalene sulfonate, a benzene sulfonate, a pyrophosphate, a phosphate, a phosphonate, a tannate, a polycarboxylate polymer, a polysaccharide, dextrin, a sulfate, or any mixture thereof, and', 'the depressant comprises an amine-aldehyde resin, an amine-aldehyde resin modified with a silane coupling agent, a Maillard reaction product, a mixture of one or more polysaccharides and one or more resins having azetidinium functional groups, a polysaccharide cross-linked with one or more resins having azetidinium functional groups, or any mixture thereof; and, 'contacting an aqueous mixture comprising a value material and a contaminant with a dispersant and a depressant to produce a treated mixture, wherein a weight ratio of the dispersant to the depressant is from about 1:1 to about 30:1, and whereinrecovering a purified product comprising the value material from the treated mixture, wherein the purified product has a reduced concentration of the contaminant relative to the aqueous slurry.2. The method of claim 1 , wherein the weight ratio of the dispersant to the depressant is from about 9:1 to about 15:1.3. The method of claim 1 , wherein the value material comprises phosphorus claim 1 , ...

METHOD FOR COMPREHENSIVE RECOVERY OF SILVER-CONTAINING LEAD SLAG

The main steps are as follows: purification, de-leading, recovery and filtration, dissolving lead, hot filtration, cooling filtration, washing and hot decomposition, silver is recycled as silver powder, lead was recovered in the form of red lead, yellow lead and chlorinated lead respectively. Compared to existing technologies, the invention adopts a wet process, the amount of waste gas and dust produced in the process of fire treatment is reduced; silver powder, red (yellow) lead and chloride lead were obtained, it can be sold as final product with high value-added features. The tail liquid produced by the process returns to the corresponding process respectively, and the tailless liquid is discharged. The pyrolysis flue gas returns to the lead removal process, flue gas treatment process is reduced, lead smoke pollution is avoided. This method has the characteristics of simple technics and pollution-free process. 1. A comprehensive recovery method of silver lead slag comprising:(1) Purification: add silver lead slag into ammonia-ammonium chloride solution, keep warm and stir, after filtration, the residue removal and the impurity removal solution are obtained;(2) De-leading: ammonium bicarbonate is added into the obtained purification liquid in (1), de-lead residue and de-lead solution were obtained by filtration;(3) Recovery and filtration: de-lead solution obtained in (2) is added into methanol to proceed silver reduction. methanol:silver is 1:4˜1:6 in molar ratio, after filtration, silver powder and reduced liquid were obtained, the solution after filtration is returned to (1) to process purification.(4) Dissolving lead: residue removal obtained in (1) is added into sodium chloride-hydrochloric acid solution, lead powder is added to process lead dissolve, after that, lead pulp is obtained;(5) Hot filtration: lead pulp obtained in (4) is heating filtrated to obtain lead-soluble slag, this slag is recovered by tri-chlorination;(6) Cooling filtration: lead-soluble ...

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 ...

RECOVERY OF MATERIAL FROM WET INCINERATOR BOTTOM ASH

A method of facilitating wet recovery of high density material from input wet incinerator bottom ash is disclosed. The method involves receiving the input wet incinerator bottom ash at a first density separator, separating by density from the input wet incinerator bottom ash, by the first density separator, first high density wet incinerator bottom ash and first low density wet incinerator bottom ash, causing the first low density wet incinerator bottom ash to flow to a second density separator, and separating by density from the first low density wet incinerator bottom ash, by the second density separator, second high density wet incinerator bottom ash and second low density incinerator bottom ash. Systems and apparatuses are also disclosed. 1. A method of facilitating wet recovery of high density material from input wet incinerator bottom ash , the method comprising:receiving the input wet incinerator bottom ash at a first density separator;separating by density from the input wet incinerator bottom ash, by the first density separator, first high density wet incinerator bottom ash and first low density wet incinerator bottom ash;causing the first low density wet incinerator bottom ash to flow to a second density separator; andseparating by density from the first low density wet incinerator bottom ash, by the second density separator, second high density wet incinerator bottom ash and second low density wet incinerator bottom ash.2. The method of claim 1 , further comprisingcausing the first high density wet incinerator bottom ash to flow to a third density separator; andseparating by density from the first high density wet incinerator bottom ash, by the third density separator, third high density wet incinerator bottom ash and third low density wet incinerator bottom ash.3. The method of claim 2 , further comprising causing the second high density wet incinerator bottom ash to flow to a second high density wet incinerator bottom ash density separator for causing ...

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 ...

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 ...

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 ...

METHODS AND COMPOSITIONS FOR EXTRACTION OF RARE EARTH ELEMENTS FROM COAL ASH

In one aspect, the disclosure relates to a microwave-assisted comminution method for achieving more efficient beneficiation and later hydrometallurgical recovery of rare earth elements and other metals from coal fly ash particles. The method requires only a short processing time, is energy efficient, allows for better process control, and is environmentally advantageous compared to current methods. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure. 2. The method of claim 1 , wherein the carbon source comprises carbon black claim 1 , carbon lampblack claim 1 , activated carbon claim 1 , 50% compressed carbon acetylene black claim 1 , 90% compressed carbon acetylene black claim 1 , 100% compressed carbon acetylene black claim 1 , charcoal claim 1 , coal claim 1 , or a combination thereof.3. The method of claim 1 , wherein the carbon source comprises carbon lampblack.4. The method of claim 1 , wherein the coal ash particles and the carbon source are present in a ratio of from 95:5 vol % to 70:30 vol %.5. The method of claim 1 , wherein in step (c) claim 1 , mixing is accomplished by dry roll milling.6. The method of further comprising pressing the first mixture into a pellet as a step between steps (c) and (d).7. The method of claim 6 , wherein the pellet has a diameter of from 13 to 26 mm and a thickness of from 5 to 20 mm.8. The method of claim 6 , wherein the pressing into a pellet is pressing using a steel die; and wherein 13 to 14 MPa of uniaxial pressure is applied to the steel die to create the pellet.9. The method of claim 8 , wherein a lubricant is applied to the steel die prior to adding the first mixture to the steel die.10. The method of claim 1 , wherein the heating vessel is a crucible claim 1 , and wherein the crucible comprises alumina.11. The method of claim 1 , wherein microwave processing of the first mixture results in heating of the first mixture ...

METHOD FOR PROCESSING TITANIUM EXTRACTION SLAG AND CARBON EXTRACTED AND DECHLORINATED TAILING

Provided are a method for processing titanium extraction slag and a carbon extraction and dechlorination tailing. The method comprises the following steps that a titanium extraction slag raw material is ground to obtain a treated material with a particle size being 0.3˜120 μm and d≤90 μm; a first solvent and a treated material are mixed with a liquid-solid ratio of (3.5˜4.5): 1 L/kg, and a first capturing agent and a first foaming agent are added for mixing and then subjected to a primary flotation to obtain a floating product and a sinking product; and a second solvent is added into the floating product to adjust the liquid-solid ratio to (4˜5): 1 L/kg, a second capturing agent and a second foaming agent are added for mixing and then subjected to a secondary flotation to obtain a foam product; the foam product is filtered and dried to obtain a refined carbon, and the sinking product is filtered and dried to obtain the carbon extraction and dechlorination tailing, wherein the d≤90 μm means that more than 90% of the powder in the treated material has a particle size of less than 90 μm. The method has the advantages that carbon in the titanium-extracted slag can be recycled, chlorine is removed, and the carbon extraction and dechlorination tailing can be used as a building material raw material. 1. A method for processing titanium extraction slag , wherein the method comprising a carbon extraction and dechlorination process , wherein the carbon extraction and dechlorination process comprising following steps:{'sub': '90', 'grinding the titanium extraction slag raw material to obtain a treated material with a particle size of 0.3˜120 μm and d≤90 μm;'}mixing a first solvent and the treatment material with a liquid-to-solid ratio of 3.5˜4.5:1 L/ kg, additionally adding a first capturing agent and a first foaming agent to mix, and then performing a primary flotation to obtain a floating product and a sinking product;adding a second solvent to the floating product to ...

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 , ...

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 ...

RECOVERY OF RARE EARTH ELEMENTS AND COMPOUNDS FROM COAL ASH

The coal ash can be sorted into groups of substantially unburned carbon and substantially burned carbon. The substantially unburned carbon or the substantially burned carbon can be magnetically treated to cause separation into a substantially magnetic portion and a substantially non-magnetic portion. The substantially magnetic portion or the substantially non-magnetic portion can be filtered into a substantially course portion and a substantially fine portion. The substantially coarse portion or the substantially fine portion can be treated with a mineral acid to form an aqueous mineral acid solution. The aqueous mineral acid solution can be extracted to form an organic solution that includes the rare earth salts. The organic solution can be mixed with water to form an aqueous solution that includes the rare earth salts. The rare earth salts can be separated from the aqueous solution. 1. A method of recovering rare earth elements from coal ash , the method comprising:sorting the coal ash into groups of substantially unburned carbon and substantially burned carbon;magnetically treating at least one of the substantially unburned carbon or the substantially burned carbon to cause separation into a substantially magnetic portion and a substantially non-magnetic portion;filtering at least one of the substantially magnetic portion or the substantially non-magnetic portion into a substantially course portion and a substantially fine portion;treating at least one of the substantially coarse portion or the substantially fine portion with a mineral acid to form an aqueous mineral acid solution;extracting the aqueous mineral acid solution to form an organic solution that includes the rare earth salts;mixing the organic solution with water to form an aqueous solution that includes the rare earth salts; andseparating the rare earth salts from the aqueous solution.2. The method of claim 1 , wherein sorting the coal ash further comprises:screening the coal ash to collect coal ash ...

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 ...

DROSS PROCESSING SYSTEM

A dross processing system crucible comprising a substantially vertical inner wall having an upper end, a lower end, an outer surface, and an inner surface, a bottom having an upper surface and a lower surface, the upper surface affixed to the lower end of the inner wall. A blockable port is disposed in the bottom, and a thermal insulating material covers the outer surface of the vertical inner wall and the lower surface of the bottom. An outer vessel is affixed to the upper end of the substantially vertical inner wall, and the thermal insulating material is disposed between the outer surface of the inner wall and the outer vessel. 1. A dross processing system crucible comprising:a. a substantially vertical inner wall having an upper end, a lower end, an outer surface, and an inner surface,b. a bottom having an upper surface and a lower surface, the upper surface affixed to the lower end of the inner wall,c. a blockable port disposed in the bottom,d. a thermal insulating material covering the outer surface of the vertical inner wall and the lower surface of the bottom, ande. an outer vessel affixed to the upper end of the substantially vertical inner wall, wherein the thermal insulating material is disposed between the outer surface of the inner wall and the outer vessel.2. The crucible of claim 1 , further comprising a protective coating on the inside surface of the inner wall and on the upper surface of the bottom.3. The crucible of claim 2 , whereas exposure to molten metal causes the coating to become an aerated insulating coating.4. The crucible of claim 1 , wherein the inner wall is stainless steel having a thickness of between 0.05 and 0.25 inches and the bottom is stainless steel having a thickness of between 0.1 and 0.4 inches.5. The crucible of claim 1 , wherein the inner wall is stainless steel having a thickness of between 0.1 and 0.15 inches and the bottom is stainless steel having a thickness of between 0.2 and 0.3 inches.6. The crucible of claim 1 , ...

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; ...

METHOD FOR TREATING COPPER CONCENTRATES

A method for the pyrometallurgical processing of a sulphide material containing copper, the sulphide containing relatively high quantities of silica and relatively low quantities of iron, wherein the process comprises feeding the sulphide material to a TSL furnace operated under oxidising conditions such that the sulphide material forms blister copper containing between 1.2 and 1.5 wt % sulphur and a slag containing between 7 and 13 wt % copper. 1. A method for the pyrometallurgical processing of a sulphide material containing copper , the sulphide containing relatively high quantities of silica and relatively low quantities of iron , the method comprising feeding the sulphide material to a TSL furnace operated under such conditions that the sulphide material forms blister copper containing up to 2 wt % sulphur and a slag containing up to 15 wt % copper.2. Amethod for the pyrometallurgical processing of a sulphide material containing copper , the sulphide containing relatively high quantities of silica and relatively low quantities of iron , the method comprising feeding the sulphide material to a TSL furnace operated under such conditions that the sulphide material forms blister copper and a slag having a CaO/SiOratio of between 0.30 and 0.55 by weight and an SiO/Fe ratio of between 1.8 and 2.8 by weight.3. The method according to wherein the sulphide material is a froth flotation concentrate.4. The method according to wherein the sulphide material contains more than about 20 wt % copper.5. The method according to wherein the sulphide material contains between about 10 wt % and 40 wt % silica.6. The method according to wherein the sulphide material contains less than approximately 20 wt % iron.7. The method according to wherein the TSL furnace contains a bath of molten material therein claim 1 , at least a portion of the molten material comprising the slag.8. The method according to wherein the TSL furnace includes one or more top entry lances claim 7 , and wherein ...

METHOD AND CARRIER FOR TRANSPORTING REDUCTANT SUCH AS COKE INTO A METALLURGICAL FURNACE AND PRODUCTION METHOD OF THE CARRIER

Provided is a method for transporting reductant such as coke into a metallurgical furnace containing a bottom layer containing molten metal and a top layer on top of the bottom layer containing molten metal. The method comprises a first providing step for providing reductant, a second providing step for providing metal, a forming step for forming carriers containing reductant and metal of reductant provided in the first providing step and metal provided in the second providing step, and a feeding step for feeding carriers formed in the forming step into the metallurgical furnace. Also provided is a carrier and a production method for producing carriers. 18-. (canceled)9. A method for transporting reductant such as coke into a metallurgical furnace containing a bottom layer containing molten metal and a top layer on top of the bottom layer ,whereinby a first providing step for providing reductant,by a second providing step for providing metal,by a forming step for forming carriers containing reductant and metal of reductant provided in the first providing step and metal provided in the second providing step,by a feeding step for feeding carriers formed in the forming step into the metallurgical furnace, andby forming carriers containing reductant and metal in the forming step having at least the density of the top layer.10. The method according to claim 9 , wherein forming carriers containing reductant and metal in the forming step having a density that is lower than the density of the bottom layer containing molten metal.11. The method according to claim 9 , wherein forming carriers containing reductant and metal in the forming step having a density of 110 to 190% claim 9 , preferably 125 to 150% claim 9 , of the density of the top layer.12. The method according to claim 9 , wherein providing metal in the second providing step in the form of copper scrap such as rejected cast anodes claim 9 , spent cast anodes claim 9 , and secondary copper.13. The method according ...

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 ...

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 ...

EXTRACTION SOLVENT FOR EXTRACTING METALLIC ELEMENTS, METHOD FOR PRODUCING SAME, AND METHOD FOR RECOVERING METALLIC ELEMENTS

The present invention provides an extraction solvent for extracting metallic elements that is characterized in that: the total concentration of chlorine (Cl2) and hypochlorous acid (HOCl) is from 20 to 1000 ppm; chlorine (Cl2) and hypochlorous acid (HOCl) are included at a molar ratio of 1:1 to 1:11; the oxidation-reduction potential is from 1100 to 1400 mV; and the pH is from 1.7 to 3.7. The present invention also provides a method for producing said extraction solvent, and a method for recovering metallic elements by using said extraction solvent. 1. An extraction solvent for extracting metallic elements , comprising:{'sub': 2', '2, 'a total concentration of chlorine (Cl) and hypochlorous acid (HOCl) of from 20 to 1,000 ppm, and contains the chlorine (Cl) and hypochlorous acid (HOCl) at a molar ratio of from 1:1 to 1:11;'}a redox potential of from 1,100 to 1,400 mV; anda pH of from 1.7 to 3.7.2. The extraction solvent according to claim 1 , which further contains ozone by from 10 to 30 ppm.3. The extraction solvent according to claim 1 , which further contains bromine claim 1 , iodine or a salt thereof by from 0.01 to 0.1 mol/L.4. A method for producing the extraction solvent according to claim 1 , comprising electrolyzing an electrolyte aqueous solution containing 0.01 to 0.5 mol/L of one or more electrolyte selected from sodium chloride claim 1 , potassium chloride claim 1 , calcium chloride and magnesium chloride at an electrical current value of from 0.5 to 5 A/min.L by using an apparatus for producing electrolyzed water.5. The method for producing an extraction solvent according to claim 4 , wherein the apparatus for producing electrolyzed water is an apparatus for producing electrolyzed water equipped with a diaphragm electrolytic cell.6. The method for producing an extraction solvent according to claim 4 , wherein the apparatus for producing electrolyzed water is an apparatus for producing electrolyzed water having a diaphragmless electrolytic cell.7. A ...

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 ...

Production of titanium compounds and metal by sustainable Methods

A unique production of titanium compounds and metal by sustainable methods using iron-titanium oxide starting material such as ilmenite, leucoxene, or rutile is described. Here the iron-titanium oxide compound is prepared by converting the iron portion of the compound to ferrous chloride at low temperatures by using close to stoichiometric amounts of sulfur and chlorine required for all the iron oxides and the other non-titanium oxides. The ferrous chloride thus formed is removed recovering a marketable product of ferrous chloride and the ‘sustainable’ titanium oxide starting material by additional process steps. This can be converted to ‘sustainable’ titanium metal, or titanium tetra-chloride by process shown herein for further conversions to titanium dioxide pigment by present chloride process or supplied to existing titanium sponge producers, benefitting them in having a ‘sustainable process’. 1. A sequential process for the production of titanium compound and metal by sustainable methods , the said process is carried out utilizing iron oxide containing ores of titanium such as ilmenite , leucoxene , hard rock ilmenite , rutile as well as man-made intermediate compounds such as synthetic rutile along with the use of sulfur and chlorine in a controlled fashion of step-wise addition of the reagent and control of temperatures.21. The said process per claim 1 , starts with the use of stage 1 reactor carrying out controlled chlorination of iron in the mixed oxide to ferrous chloride solids along with unreacted titanium solids claim 1 , and conversion of the said ferrous chloride to marketable ferrous chloride solution in water of suitable concentration claim 1 , and making a high grade synthetic rutile with 97-99% TiOwhich can be either marketed or taken to a next step. The controlled chlorination in stage reactor is carried out by adding stoichiometric amount of sulfur and chlorine needed for conversion of iron to ferrous chloride solids at a temperature of 70 to 250 ...

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 ...

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 ...

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 ...

METHOD OF PRODUCING VANADIUM ELECTROLYTIC SOLUTION FOR REDOX FLOW CELL

An object of the disclosure is to provide a method of efficiently producing a highly-pure vanadium electrolytic solution from a combustion residue that is discharged from facilities such as refineries and power plants and contains uncombusted carbon. The method of producing a vanadium electrolytic solution for redox flow cell (RFB) includes a vanadium eluate generation step of obtaining a vanadium eluate in which vanadium is dissolved. The vanadium is contained in a combustion residue obtained after combustion of a fossil fuel. The method further includes a precipitation step of mixing a sulfide precipitant into the vanadium eluate to precipitate a solid substance of precipitate in a reduction state and a wet oxidation step including a process of adding dilute sulfuric acid to the solid substance separated from the solution to generate a vanadium sulfate solution. 127-. (canceled)28. A method of producing a vanadium electrolytic solution for redox flow cell , the method comprising:a vanadium eluate generation step of obtaining a vanadium eluate in which vanadium is dissolved, the vanadium being contained in a combustion residue obtained after combustion of a fossil fuel;a precipitation step to precipitate a vanadium compound from the vanadium eluate; anda vanadium sulfate solution generation step including a process of adding dilute sulfuric acid to the solid substance separated from the liquid to generate a vanadium sulfate solution.29. The method of producing a vanadium electrolytic solution as recited in claim 28 , wherein the precipitation step comprises:a sulfur precipitation step of mixing a sulfide precipitant into the vanadium eluate to precipitate sulfur; anda vanadium precipitation step of adding sodium hydroxide to the vanadium eluate, from which the sulfur is separated by filtration in the sulfur precipitation step, to adjust pH and precipitating the solid substance.30. The method of producing a vanadium electrolytic solution as recited in claim 29 , ...

PREPARATION METHOD OF CALCIUM CARBONATE WITH HIGH PURITY FROM INORGANIC MATERIALS CONTAINING ALKALI METALS OR ALKALI EARTH METALS

The present invention relates to a method and a process of preparing precipitated calcium carbonate of high purity by extracting calcium ion contained in an alkali ion-containing inorganic material such as mineral, steelmaking slag and waste concrete with the use of an acidic aqueous solution, separating other metal ions from the extracted solution, preparing an alkaline earth metal hydroxide using an alkaline aqueous solution and then contacting the same with carbon dioxide. 1. A method for preparing calcium carbonate from an alkali ion-comprising inorganic material , which comprises:(1) a step of preparing hydrochloric acid and a sodium hydroxide aqueous solution or a mixture of a sodium hydroxide aqueous solution and a potassium hydroxide aqueous solution(2) a step of producing a dissolving solution by extracting metal ions comprising a calcium ion from an alkali ion-comprising inorganic material using the hydrochloric acid;(3) a step of removing an impurity from the dissolving solution by reacting the dissolving solution with the sodium hydroxide aqueous solution or the mixture of the sodium hydroxide aqueous solution and the potassium hydroxide aqueous solution(4) a step of producing a slurry comprising calcium hydroxide by reacting the impurity-removed dissolving solution with the sodium hydroxide aqueous solution or the mixture of the sodium hydroxide aqueous solution and the potassium hydroxide aqueous solution and(5) a step of transforming the calcium hydroxide into high-purity calcium carbonate by providing carbon dioxide to the slurry.2. The method for preparing calcium carbonate from an alkali ion-comprising inorganic material according to claim 1 , wherein claim 1 , in the step (1) claim 1 , the hydrochloric acid and the sodium hydroxide aqueous solution or the mixture of the sodium hydroxide aqueous solution and the potassium hydroxide aqueous solution are prepared by purifying a waste acid and a waste alkali.3. The method for preparing calcium ...

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 ...

METHOD FOR PRODUCING BASIC PRODUCTS FOR USE AS E.G. ALKALIZING AGENT (SODA LYE SUBSTITUTE), FOR GROUND STABILIZATION OR AS FILLER/PIGMENT

A method for producing basic products from ashes, minerals, organic solids and other solids, including the provision of a starting material in particle form, mixing the starting material with an additive for synthesis and crushing the particles of the starting material, with a modification of the particles by the supplied additives for synthesis taking place directly during crushing, such that the energy-efficient production of a basic product with a defined particle size and high reactivity is effected and the produced basic products can be used directly for further product production, e.g. as alkalizing agent, for ground stabilization or as filler/pigments. 1. A method for producing basic products , comprising the following steps:i. providing the starting material in particle form,ii. mixing the particles of the starting material with at least one additive for synthesis, andiii. crushing the particles of the starting material, a modification of the particles by the added additives for synthesis taking place directly during crushing.2. The method according to claim 1 , in which the produced basic product has an average particle size of 0.01 to 50 μm claim 1 , in particular 0.05 to 50 μm.3. The method according to and claim 1 , in which the basic product is directly used as product claim 1 , in particular for ground stabilization claim 1 , as alkalizing agent claim 1 , as soda lye substitute claim 1 , as adsorption agent and/or as filler/pigment.4. The method according to one of to claim 1 , in which the starting material provided in step (i) is subjected to a pre-treatment in which the particles of the starting material are crushed and/or are separated into at least two fractions with different average particle sizes.5. The method according to claim 4 , in which to provide the starting material the crushing of the particles of the starting material is carried out by pressure waves in the pre-treatment.6. The method according to and claim 4 , in which to provide the ...

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 ...

PROCESSES FOR PREPARING VARIOUS METALS AND DERIVATIVES THEREOF FROM COPPER- AND SULFUR-CONTAINING MATERIAL

The processes of the present disclosure can comprise feeding a furnace with a raw material chosen from a copper-containing material, a nickel-containing material, a cobalt-containing material and mixtures thereof. These materials can be quite complex and contain various levels of impurities and valuable metals (base metals, precious metals, platinum group metals, minor metals). The processes allow the volatilization of arsenic and indium contained therein, thereby obtaining a material at least partially depleted in at least one of arsenic and indium, wherein before volatilizing the material, composition of the material is optionally modified so as to obtain a ratio % S/(% (Cu/2)+% Ni+% Co) of about 0.5 to about 2. The processes can comprise feeding a melting device with the depleted material, and with a source of carbon in order to obtain a multi-layer product and an off gas, wherein before melting the depleted material, the depleted material composition is optionally modified so as to obtain a ratio % S/(% (Cu/2)+% Ni+% Co) of about 0.5 to about 2. While one of the main purposes of the processes of the present disclosure is to recover Cu, Ni and Co from complex materials, it also provides a means of recovering several other metals, including In, Ge, Pb, Bi, precious metals and platinum group metals. Cu, Ni, Co and other metals are conveniently recovered in different products from the processes (gaseous, dust, slag, matte, speiss and metal). 1. (canceled)49-. (canceled)10. The process of claim 3 , wherein said briquettes comprise at least one additive chosen from a source of sulfur and a source of iron.11. (canceled)12. The process of claim 2 , wherein said source of carbon is effective for use as a reducing agent and/or for providing a thermal balance of the furnace.13. (canceled)14. The process of claim 2 , wherein said source of carbon is chosen from activated carbon claim 2 , coke breeze claim 2 , carbon or pet coke claim 2 , diesel claim 2 , natural gas and ...

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 ...

A Method for Enriching Precious Metals from Printed Circuit Board Incineration Ash from Molten Pool by Circulating Chlorination

The invention relates to the field of comprehensive recovery of valuable elements such as bromine, base metal and precious metal from incineration ash, especially relates to a method for enriching precious metals from printed circuit board incineration ash by bath smelting-chlorination circulation process. The process mainly comprises pretreatment of the printed circuit board Incineration ash and circulation-chlorination enrichment process for precious metals. The crude copper, crude zinc sulfate, bromine, lead chloride and precious metal enriched slag are obtained. Compared with the traditional process, it realizes the cycle enrichment of precious metals as well as avoids the loss of valuable metals and secondary pollution caused by tail liquid discharge. 16-. (canceled)7. A method for enriching precious metals from printed circuit board incineration ash by bath smelting-chlorination circulation process , comprising the steps of: slurry aging to obtain a slurry by mixing the printed circuit board incineration ash with concentrated sulfuric acid with a mass concentration of 98%, the mass ratio between the printed circuit board incineration ash and the 98% concentrated sulfuric acid being 0.5-1.5:1, the aging time being 12-24 hours.', 'primary roasting to obtain a primary roasted sand and a primary roasted smoke, by roasting the slurry;', 'secondary roasting to obtain a secondary roasted sand and a secondary roasted smoke by roasting the primary roasted sand;', 'water leaching enrichment to obtain a water leaching slag rich in precious metals and a water leaching solution, by leaching the secondary roasted sand with an initial water leaching solution comprising water;', 'displacement precipitation of copper to obtain a crude copper and a post copper precipitation solution, by adding zinc powder to the water leaching solution to displace and precipitate copper from the water leaching solution, wherein the molar ratio of the zinc powder to copper in leaching solution ...

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 ...

METHOD FOR MANUFACTURING REDUCED IRON

Provided is a process for manufacturing reduced iron by heating agglomerates, said process being capable of enhancing the yield of reduced iron and thus improving the productivity thereof. A process for manufacturing reduced iron which includes a step for agglomerating a mixture that comprises an iron oxide source, a carbonaceous reducing agent and a melting point regulator and a step for heating the obtained agglomerates to reduce the iron oxide contained in the agglomerates, wherein the agglomerates contain at least 1 mass % of a silicate mineral having a solidus temperature of 1300° C. or lower. 1. A method for manufacturing a reduced iron , comprising the steps of:agglomerating a mixture including an iron oxide source, a carbonaceous reducing agent, and a melting point adjusting agent, andheating a resulting agglomerate to reduce an iron oxide in the agglomerate,wherein as the agglomerate, the one containing a silicate mineral with a solidus temperature of 1300° C. or less in an amount of 1 mass % or more is used.2. The manufacturing method according to claim 1 , wherein the silicate mineral contains a volatile matter.3. The manufacturing method according to claim 1 , wherein the silicate mineral is of an amphibole group.4. The manufacturing method according to claim 3 , wherein the amphibole group is at least one or more selected from the group consisting of actinolite claim 3 , cummingtonite claim 3 , and grunerite.5. The manufacturing method according to claim 1 , wherein as the iron oxide source claim 1 , the one containing a silicate mineral with a solidus temperature of 1300° C. or less is used.6. The manufacturing method according to claim 1 , wherein as the melting point adjusting agent claim 1 , a silicate mineral with a solidus temperature of 1300° C. or less is used. The present invention relates to a method for heating an agglomerate including an iron oxide source such as iron ore or iron-making dust, and a carbonaceous reducing agent such as a ...

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 ...

Production of nano sized ferrite

Method for producing nano sized ferrite particles from a metallurgical slag, the method including the steps of: a) providing a ladle with a molten slag including CaO, SiO2, FeO, and at least one of MnO, Cr2O3, V2O3. b) oxidizing the slag at a temperature in the interval of 1573K-1773K (1300-1500° C.) for 10-90 minutes, c) removing at least a portion of the slag from the ladle d) cooling the removed slag portion to a temperature below 373K (100° C.), e) extracting nano sized manganese ferrite and/or chromium ferrite and/or vanadium ferrite particles from the cooled portion.

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 ...

METHOD FOR PRODUCING REDUCED IRON

Provided is a technique for increasing the yield of reduced iron, thereby improving productivity when manufacturing reduced iron by heating an agglomerate. 1. A method for producing reduced iron , the method comprising:agglomerating a mixture comprising an iron oxide-containing substance, a carbonaceous reducing agent, and a melting point-adjusting agent, to obtain resulting agglomerates; andheating the resulting agglomerates, reducing and partially melting iron oxide in the agglomerates, and allowing an iron component to coalesce, to produce a reduced iron,wherein a particle diameter of fine particle iron formed in producing the reduced iron is adjusted, and the fine particle iron is blended with the mixture.2. The method according to claim 1 , wherein the particle diameter is adjusted to 3 mm or less.3. The method according to claim 1 , wherein the adjusting of the particle diameter occurs by classification of the fine particle iron.4. The method according to claim 1 , wherein the adjusting of the particle diameter occurs by pulverization and then classification of the fine particle iron.5. The method according to claim 1 , wherein the adjusting of the particle diameter occurs by pulverization of the fine particle iron.6. The method according to claim 1 , wherein:a total iron content (Total Fe) of the fine particle iron is 50% by mass or more; and{'sup': '3', 'a specific gravity of the fine particle iron is 4 g/cmor more.'}7. The method according to claim 1 , wherein claim 1 , when a mass of the mixture other than the fine particle iron is defined as 100% claim 1 , the fine particle iron is blended with the mixture in an amount of 3% by mass or more. The present invention relates to a method for producing reduced iron by heating an iron oxide-containing substance, such as iron ore and steel mill waste dust, and agglomerates containing a carbonaceous reducing agent, such as a carbon material.In the case of producing reduced iron by the reduction of iron oxide ...

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 producing cold-moulded iron-containing briquettes

When cold-moulded (cold-pressed) briquettes are produced from iron-containing metallurgical waste material admixed with binder, in order to achieve high mechanical strength of the briquettes and to obtain virtually complete reducibility, magnetitic metallurgical waste material such as scale (tinder) (1) is mixed with haematitic fines (5) to form a layer (10) which envelops the individual magnetitic particles (9) and consists of the haematitic fines (5), after which the binder is then admixed (Figure 1). <IMAGE>

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.

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.

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。

Plasma induced fuming

증발성 물질의 회수 방법은 증발성 금속 및/또는 증발성 금속 화합물을 포함하는 물질을 용융 슬래그 내로 융융시키는 단계(210)를 포함한다. 상기 용융 슬래그는 고온 기체의 서브머지드 제트에 의하여 교반된다(212). 상기 고온 기체는 적어도 200 MJ/kmol, 바람직하게 적어도 300 MJ/kmol의 엔탈피를 가지도록 조절된다(214). 상기 증발성 금속 및/또는 증발성 금속 화합물의 적어도 일부가 상기 용융 슬래그로부터 퓨밍된다(216). 상기 방법을 위한 장치는 노 내에 용융 슬래그 내로 침적된 플라스마 토치를 가지는 노를 기초로 한다. The method of recovering the evaporative material includes a step 210 of melting the evaporative metal and/or the material comprising the evaporative metal compound into molten slag. The molten slag is agitated by a submerged jet of hot gas (212). The hot gas is adjusted to have an enthalpy of at least 200 MJ/kmol, preferably at least 300 MJ/kmol (214). At least a portion of the evaporative metal and/or evaporative metal compound is fumed from the molten slag (216). The apparatus for the method is based on a furnace with a plasma torch deposited in the furnace into molten slag.

Method of processing metallurgical production waste

FIELD: metallurgy. SUBSTANCE: iron and zinc-containing dust, milling scale, carbonaceous reducing agent and slag forming components are mixed, agglomerated, dried and heat-treated in a rotary-hearth kiln. Zinc sublimations are captured, the exhaust gases are cooled. Oxidation and condensation of zinc oxide in the form of dust and trapping of dust containing zinc oxide are carried out. Granulated cast iron and slag are cooled and separated. The ratio of dust and scale is set to provide total iron content in the mixture of at least 50%. The slag forming components are introduced in an amount providing the basicity of CaO/SiO 2 in range of 0.6-1.6 and the sulfur content in cast iron is not more than 0.09. The carbonaceous reductant is introduced in an amount providing carbon content in the cast iron ranging from 1.0 to 4.5%. Heat treatment is carried out by two-stage heating: at 1200-1300°C, then at a temperature increased by 80-200°C. EFFECT: increasing the content of zinc oxide in concentrate extracted from dust and scale, obtaining cast iron with metallic iron content of 94 percent or more, reducing the consumption of reducing agent and fuel. 3 cl, 1 dwg, 1 tbl, 1 ex 2626371 С 1 ко РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ 0 5 соб 37409 ВО > Пе © # о С1 (51) МПК С22В 7/02 (2006.01) СРВ 11/06 (2006.0Т) С22В 19/38 (2006.01) (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2016135884, 05.09.2016 (24) Дата начала отсчета срока действия патента: 05.09.2016 Дата регистрации: 26.07.2017 Приоритет(ы): (22) Дата подачи заявки: 05.09.2016 (45) Опубликовано: 26.07.2017 Бюл. № 21 Адрес для переписки: 456910, г. Сатка, Челябинской области, ул. Солнечная, 32, ООО "Урал-рециклинг", Патентно-лицензионный отдел, Лихачевой О.А. (72) Автор(ы): Одегов Сергей Юрьевич (КО), Федосов Игорь Борисович (КП), Баранов Андрей Павлович (КО), Черных Владимир Евгеньевич (КП), Патрушов Алексей Евгеньевич (КО) (73) Патентообладатель(и): Общество с ограниченной ...

A Treatment method of Electric arc furnace Dust

본 발명은 전기로 제강분진의 환원소성 공정을 진행하는 단계; 상기 환원소성 공정을 진행하여 아연과 철을 분리회수하는 단계; 상기 분리회수된 아연성분을 조산화아연으로 포집하는 단계; 상기 조산화아연의 산화배소 조업을 진행하는 단계; 상기 산화배소 조업을 진행하여 정제된 산화아연을 얻고, 상기 산화배소 조업으로부터 발생되는 배가스로부터, Pb와 Zn을 포함하는 더스트 형태의 분말을 포집하는 단계; 상기 포집된 더스트 내의 Pb와 Zn을 분리회수하는 단계; 및 상기 분리회수된 Pb와 Zn의 탄산화 반응을 진행하는 단계를 포함하는 전기로 제강분진의 처리방법에 관한 것으로, 전기로 제강분진을 처리함에 있어서, 전기로 제강분진에 함유되어 있는 유가금속을 효율적으로 회수할 수 있고, 추가적인 2차 폐기물의 발생이 전혀 없이 친환경적인 처리 효과를 얻을 수 있다. The present invention relates to a method for manufacturing a steel sheet, Performing the reducing and firing step to separate and recover zinc and iron; Collecting the separated and recovered zinc component with zinc oxide; Advancing the oxidation and roasting of the zinc oxide; Collecting the dust-type powder containing Pb and Zn from the exhaust gas generated from the oxidizing roasting operation; Separating and recovering Pb and Zn in the collected dust; The present invention relates to a method of treating electric furnace steel dust, which comprises a step of carbonizing an electric furnace steel dust, and a step of carbonizing the separated and recovered Pb and Zn. In the method of treating electric furnace steel dust, , And an environmentally-friendly treatment effect can be obtained without any generation of additional secondary waste.

Электротермическа ванна печь дл металлургической обработки цветных металлов

一种利用高炉粉尘生产含锌材料的方法

本发明提供了一种利用高炉粉尘生产含锌材料的方法,该方法主要通过湿法提炼的方式，将高炉粉尘中的含锌化合物进行有效的分离和提取，从而有效地避免该含锌化合物在其他提炼工序中发生损耗，以进一步提高对高炉粉尘中含锌化合物的富集化程度，此外该方法还有效地简化含锌材料的提炼工序，从而降低利用高炉粉尘中回收含锌材料的成本。

Method for recovery of zinc and iron from zinc- and iron-containing materials (versions)

FIELD: hydrometallurgy; methods for recovery of zinc and other metals from sulfide materials also containing iron, and production of commercial iron. SUBSTANCE: method includes leaching of sulfide materials under oxidizing conditions by two-stage method of counterflow leaching under pressure with obtaining of zinc-containing solution from which zinc is recovered by conventional methods such as electrochemical recovery with subsequent reducing leaching to produce lead- and silver-containing product containing practically all lead and main part of silver contained in zinc-containing sulfide material and solution with high content of iron in bivalent state, from which practically clean commercial and economically acceptable iron is produced in the form of hematite which contains a larger part of soluble iron present in zinc-containing sulfide materials. EFFECT: higher efficiency. 9 cl, 5 dwg 4 tbl ДЗО с ПЧ ГЭ РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) (51) МПК ВИ” 2117 057‘ 13) Сл С 22В 3/08, 19/00, 13/00 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 95122127102, 03.05.1994 (30) Приоритет: 04.05.1993 СВ 93091445 (46) Дата публикации: 10.08.1998 (56) Ссылки: ЗЧ, патент, 4505744, кл. С 22 В 19/00, 1985. ЕР, 0100237, кл. С 22В 19/22, 1984. (71) Заявитель: Шерритг Интэрнэшнл Консалтантс Инк. (СА) (72) Изобретатель: Челклей Майкл Эдвард (СА), Мастерс Ян Мартин (СА), Дойл Бэрри Невилл (СА) (73) Патентообладатель: Шерритг Интэрнэшнл Консалтантс Инк. (СА) (54) СПОСОБ ВЫДЕЛЕНИЯ ЦИНКА И ЖЕЛЕЗА ИЗ ЦИНК- И ЖЕЛЕЗОСОДЕРЖАЩЕГО МАТЕРИАЛА (ВАРИАНТЫ) (57) Реферат: Способ (его вариант) может быть использован в гидрометаллургии для выделения цинка и других металлов из сульфидного материала, который также содержит железо, и к получению товарного железа. Согласно способу сульфидный материал выщелачивают в окислительных условиях по двухстадийному способу противоточного — выщелачивания под давлением с получением цинксодержащего раствора, из которого ...

Flue gas cooling and cleaning system

An improved flue gas cooler (10), or bank of coolers (10), handles flue gas G from aluminium reduction cells in an aluminium smelter plant. The or each flue gas cooler (10) has a gas inlet chamber (14), a gas outlet chamber (16), and a matrix of gas cooling tubes (18) extending between the inlet chamber and the outlet chamber. Each cooling tube (18) has a bell-shaped inlet end (19) comprising an aerodynamically curved gas-accelerating profile effective to facilitate streamlined flow of flue gas G into the tube. The improved flue gas cooler makes it possible to connect the flue gas cooler to receive hot raw flue gas G direct from the aluminium reduction cells without getting clogged by dust and sublimates present in the flue gas. Once cooled, the flue gas can be safely passed on to a flue gas cleaning plant of the dry scrubbing type. The improved flue gas coolers are advantageously part of a system for using heat energy from the flue gas, in which a closed circuit coolant circulation system circulates coolant through the flue gas cooler and a heat exchange arrangement (24). Heat energy extracted from the coolant by the heat exchange arrangement (24) may be used to increase the efficiency of further plant coupled to the heat exchange arrangement.

Patent SU423285A3

含锌转炉粉尘的再循环方法

本发明涉及含锌转炉粉尘的再循环方法，包括从利用湿式集尘装置回收的转炉粉尘中分离粗粒成分，得到锌含有率0.5～10质量％，铁成分含有率50～90质量％的含锌细粒粉尘的第1工序；利用水旋流器(15)，将其分离成平均粒径在8μm以上、25μm以下的锌含有率在1质量％以下的低锌的中细粒粉尘，和平均粒径在1μm以上、5μm以下的锌含有率大于1质量％，且比中细粒粉尘含有更多氧化铁的高锌的微细粒粉尘的第2工序；中细粒粉尘在不实施脱锌处理下，通过添加粘合剂实施冲压处理，形成作为转炉原料或电炉原料使用的成块物的第3工序；和对微细粒粉尘在干燥后实施脱锌处理，直接作为高炉原料，或形成成块物，作为转炉原料的第4工序。

一种钢铁厂含锌烟尘灰循环利用的方法

本发明涉及一种钢铁厂含锌烟尘灰生产高纯氧化锌并回收铁炭返回冶炼的循环利用方法。采用氨法浸取烟尘灰里面的锌，使用次氧化锌或锌渣提高浸出液锌浓度，经过净化除杂，蒸氨结晶，干燥，煅烧制得高纯氧化锌；浸取后的烟尘灰尾渣，或采用直接烧结法，或采用小球烧结法，或采用球团法，或采用转底炉、回转窑、竖炉、循环流化床等直接还原，回收铁炭充分利用，收集的次氧化锌烟尘灰用于前端浸取提高浸出液锌浓度。本发明采用常规方法，制得氧化锌含量大于95％，锌提取率以及碱金属、氟、氯有害物质去除率均在90％以上；浸取后的烟尘灰尾渣回收工艺设备适应性广，可根据已有设备选择合适的处理工艺；效益高且环保，做到含锌烟尘灰的高效循环利用。

제철더스트의 처리방법 및 장치

제철더스트에 포함되어 있는 철과 아연과 같은 비철금속을 분리, 회수하기 위하여 탄재에 더스트를 혼합하고 외열식회전로에서 환원처리하도록 하며, 더스트와 탄재는 1 : 0.05∼0.3 의 비율로 혼합하고, 이 혼합물과 환원가스는 수소 또는 일산화탄소를 함유하는 환원가스를 외열식회전로에 투입한다. 로내에서는 환원가스에 의해 제철더스트중의 철과 아연의 비철금속이 환원되고, 아연이 고형물로부터 휘발분리된다. 이 때 동시에 생성되는 수증기와 이산화탄소는 탄재와 반응하여 수소와 일산화탄소로 재생되고, 로내는 고환원분위기로 유지된다.

一种用锑烟灰制备精锑的方法

本发明属于金属冶炼后的产物精炼领域，具体是涉及到一种用锑烟灰制备精锑的方法，包括如下步骤：1、将锑烟灰和水混合，加入氢氟酸和氟化铵，搅拌，过滤，得滤液1；2、往滤液1中加入浓硫酸，搅拌，过滤，得滤液2；3、对滤液2处理，制备精锑，本发明的方法得到的产物，锑的回收率高，纯度高。

一种协同处理半焦和含锌粉尘的方法

一种协同处理半焦和含锌粉尘的方法，包括以下工艺步骤：(1)、混料；将含锌粉尘与半焦按一定比例进行配料，配料中半焦所占比例为1％～10％，石灰所占比例为1％～2％，剩余部分全部为含锌粉尘，通过皮带输送至球磨机中，在球磨机中进行混料，使物料混合均匀；(2)、上料、加料；(3)、回转窑升温和还原；(4)、烟气中锌的收集；(5)、窑渣的循环利用；(6)、得到的最终产品，铁精粉经干燥后直接进行烧结配料，泥浆送高密压滤机压滤。该工艺的特点取消了造球工序，直接将粉料加入窑内还原，简化了生产流程，回收Zn、Pb等金属元素较为容易。整个生产过程实现环保生产，无二次污染，环保完全达标。

一种锌电积电解废液净化生产优质锌的工艺方法

本发明公开了一种锌电积电解废液净化生产优质锌的工艺方法，通过对电积生产产出的硫酸锌溶液进行曝气、沉降分离、过滤处理，保证过滤液温度36‑40℃，曝气处理的上层溶液和沉降所得的底流、过滤渣返回浸出；过滤液与新液混合后加入到电解槽进行锌电积生产。经过处理，在曝气时通入空气、沉降和过滤时自然降温，可以减少或者不需要在启用常规电解生产过程中冷却塔时进行降温，降低电解液中的有机物、悬浮物杂质、阳极泥含量，明鲜提高锌片质量和电解效率。

분체탄소취입에의한스테인레스강슬래그중의유가금속회수방법

본 발명은 스테인레스 제강 슬래그중에 포함된 유가금속을 분체탄소를 이용하여 회수하는 방법에 관한 것으로서, 보다 상세하게는 스테인레스 제강 전기로 조업중 유가금속 산화물을 함유한 슬래그로부터 유가금속을 환원시키기 위해 용강톤당 적산전력이 280∼300kWh 인 시점에서, 입도가 5mm이하인 분체탄소를 슬래그중에 취입하는 것을 특징으로 하는 분체탄소 취입에 의한 스테인레스강 슬래그중의 유가금속 회수방법에 관한 것이다. 또한, 상기 분체탄소 취입은 질소 또는 아르곤 가스중 1종의 불활성가스를 이용하여 이루어지는 것을 그 특징으로 한다.

전기로더스트(철광분진)를 이용하여 복합미네랄을제조하는 방법

본 발명은 황산망간을 제조하고 남은 산화철액과 슬러지를 전기로더스트를 이용하여 중화시켜 중금속을 제거하고 복합미네랄을 제조하는 방법에 관한 것으로, 보다 구체적인 것은 묽은 황산액에 이산화망간과 철을 같이 넣어 4시간정도 반응시켜 이산화망간을 용해시키고 이산화망간이 용해된 액에 전기로더스트를 중화재로 넣어 중화시키고 용액을 여과하여 농축시키므로서 황산망간을 얻고 황산망간을 얻고 남은 산화철액과 슬러지에 황산을 가해 재용해시키고 철을 넣어 환원시킨 다음 전기로더스트를 넣어 PH4로 중화시킨다음 아연말을 넣어 중금속을 분리하고 중금속이 제거된 여액을 농축건조하여 복합미네랄을 제조하는 것인바 이렇게 함으로서 전기로더스트를 복합미네랄제조에 이용할수 있게한 것이다.

Method of manufacturing cold-pressed briquets from iron-containing metallurgy wastes

FIELD: ferrous metallurgy. SUBSTANCE: invention tackles the problem of using process waste when preparing metallurgic raw material. In manufacture of hold-pressed briquets from iron- containing waste mixed with binder, magnetite metallurgic waste, for example, dross is first mixed with hematite-containing fine-dispersion materials to form layer enveloping discrete magnetite particles and consisting of fine hematite fractions, whereupon binder is admixed. As binder, a mixture containing 0.5-2.0 wt % calcium hydroxide and 2-4 wt % molasses may be used, and, as fine-dispersion hematite-containing material, finely divided iron ore, and/or iron-ore pellets as well as filter and production room dust. EFFECT: increased reduction degree. 10 cl, 2 dwg сС6б9%$60с ПЧ ГЭ РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) ВИ” 2 093 592 ' 13) СЛ 51 МПК” © 22 В 1/24 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 94021639/02, 11.06.1994 (30) Приоритет: 21.06.1993 АТ А 1212/93 (46) Дата публикации: 20.10.1997 (56) Ссылки: 1. Патент ФРГ М 3519415, кл. С 22 В 1/242, 1986. 2. Патент США М 5100464, кл. С 22В 11/243, 1991. 3. Патент ФРГ М 4123626, кл. С 22 С 5/52, 1991. 4. Патент ФРГ М 3827516, кл. С 22 В 1/243, 1988. (71) Заявитель: Фоест-Альпине Индустрианлагенбаус ГмбХ (АТ) (72) Изобретатель: Гюнтер Шрей[АТ], Геро Тесмер[АТ], Карл Катценштайнер[АТ], Клаус Коппер[АТ] (73) Патентообладатель: Фоест-Альпине Индустрианлагенбаус ГмбХ (АТ) (54) СПОСОБ ПРОИЗВОДСТВА ХОЛОДНОПРЕССОВАННЫХ БРИКЕТОВ ИЗ ЖЕЛЕЗОСОДЕРЖАЩИХ ОТХОДОВ МЕТАЛЛУРГИЧЕСКОГО ПРОИЗВОДСТВА (57) Реферат: Использование: относится к области подготовки металлургического сырья с использованием образующихся В металлургическом производстве отходов. Сущность: при изготовлении холоднопрессованных брикетов из железосодержащих отходов металлургического производства, смешанных со связующим для достижения высокой прочности брикетов и с целью почти полной восстанавливаемости магнетитовые отходы металлургического ...

아연페라이트가 함유된 제강분진으로부터 염산과 금속아연의 회수방법

본 발명은 전기로 제강로 안에서 발생하는 분진(electric arc furnace (EAF)dust)을 염산용액으로 처리하여 고순도의 염산과 금속아연을 회수하는 방법에 관한 것이다. 본 발명은 철의 침출을 최소화하면서 아연을 선택적으로 침출하는 것으로서 철은 FeOOH와 Fe 2 O 3 형태로 석출하고, 고온의 37g/l-74g/l 염산(HCl)과 104g/l -270g/l 염화아연(ZnCl 2 ) 침출용액이 사용된다. 고온침출이 되면 침출된 철을 제거하기 위하여 새 분진을 투여한다. 이 염화아연용액은 활성탄과 금속아연을 사용하여 정제하고 그 다음 양이온 교환막이 장착된 전착셀에서 고순도 금속아연과 염산을 얻는다. 아연 농도가 50-130g/l인 용액에서 전착을 40℃ 이하에서 행함으로써 아연을 90%이상의 전류효율로서 얻을 수가 있다. 양극 전류밀도가 300-1000 A/m 2 , 멤브레인 전류밀도가 750-2000 A/m 2 범위에서, 전착중에 염산은 2%이하의 손실이 되고 에너지는 5.0kWh/ kg-Zn 이하이다. 전착 후 얻어지는 배출액은 1-2N 의 염산농도로서 중성침출에서 나온 고형분을 고온에서 침출하기에 적당하다.

Method of recovering metal from waste material using used molding sand and manufacturing artificial molding sand and artificial molding sand manufactured by the same

The present invention relates to a method for using waste molding sand in recovery of valuable metal included in a waste catalyst or wet-process sludge and manufacturing artificial molding sand from used waste molding sand. An objective of the present invention is to provide a method which can markedly reduce the manufacturing costs of artificial molding sand. According to the present invention, the method comprises: (a) a step of inserting a raw material including a reducing agent, waste molding sand, and waste including a catalyst or wet-process sludge into a reducing furnace; (b) a melting step of heating the inserted raw material to form slag through included components of the waste and the waste molding sand and reduce a portion of metal included in the waste; (c) a step of separating the slag and the reduced metal; and (d) a step of using the slag from which the metal is separated to manufacture spherical particles.

A kind of method of Ti-containing slag Selectively leaching titanium

本发明公开了一种含钛炉渣选择性浸出钛的方法，属于钛资源利用技术领域，包括以下步骤：S1.将含钛炉渣破碎并细磨；得到预定细度的含钛炉渣；S2.将细磨后的含钛炉渣进行第一段浸出反应，将浸出后的料浆进行固液分离，得到浸出液和含钛浸出渣；S3.将含钛浸出渣进行第二段浸出反应，将浸出后的料浆进行固液分离，获得浸出钛液和残渣。本发明可以实现含钛炉渣中硅元素的预先脱除和钛元素的选择性高效浸出，浸出钛液中杂质种类和含量少，有利于后续钛液中杂质元素的去除。该工艺流程设计合理，操作简单，无环境污染。

Method of production of biocide, zinc oxide and magnesium and calcium chloride crystal hydrates from production waste

FIELD: chemistry. SUBSTANCE: invention relates to a method of production of biocide and other products based on industrial waste, which can be used in various coatings protective against biological effects. Slurry from etching of brass with hydrochloric acid and dolomite carry-over dust are processed producing zinc oxide, magnesium and calcium chloride crystal hydrates and a biocide - copper oxide. The slurry is mixed with zinc oxide in a reactor with distilled water producing a suspension, which is then filtered producing residual copper oxide and a first filtrate. The residue is washed, then dried and ground in an environment of stack from burning natural gas with a lack of oxygen producing a biocide - monovalent copper oxide. The first filtrate is mixed with dolomite carry-over dust in the reactor producing a suspension, which is then filtered producing residual zinc oxide with an admixture of chlorides and a second filtrate. The residue is washed, then dried and ground producing zinc oxide. The second filtrate is cooled producing magnesium chloride crystal hydrate, which is separated by centrifuge. After separation of the magnesium chloride crystal hydrate from the filtrate it is dried and cooled producing calcium chloride crystal hydrate with a particle size of 200 to 250 mcm. EFFECT: method allows producing high quality biocide, zinc oxide and magnesium and calcium chloride crystal hydrates. 1 cl, 1 dwg, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 746 731 C1 (51) МПК C22B 7/00 (2006.01) C22B 3/10 (2006.01) C22B 19/34 (2006.01) C01G 3/02 (2006.01) C01F 5/30 (2006.01) C01F 11/24 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C22B 7/006 (2020.08); C22B 7/02 (2020.08); C22B 3/10 (2020.08); C22B 19/34 (2020.08); C01G 3/02 (2020.08); C01F 5/30 (2020.08); C01F 11/24 (2020.08) (21)(22) Заявка: 2019139491, 03.12.2019 03.12.2019 Дата регистрации: 19.04.2021 (45) Опубликовано: 19.04.2021 Бюл. № 11 2 7 4 6 7 ...

A kind of technique of ash-laden gas recycling Sulphur ressource using after zinc calcine or zinc roasting

本发明公开了一种利用锌焙砂或锌焙烧后的含尘烟气回收硫资源的工艺，该工艺步骤如下：a、采用锌焙砂或锌焙烧后的含尘烟气制备出含固量为17%～25%的含氧化锌的浆液；b、将浆液用泵输送至高效脱硫组合塔的循环液泵出口管路并与循环液混合均匀后从高速喷头喷射，从高速喷头喷射出的大流量含氧化锌的吸收液与逆向而来的含SO 2 烟气进行接触反应生成亚硫酸锌浆液；c、亚硫酸锌浆液流入高效脱硫组合塔的氧化循环槽中与切向鼓入的空气充分接触后进行氧化反应生成可溶解的硫酸锌溶液；d、硫酸锌溶液通过专用抽出泵送往浸出槽进一步除去杂质以生产出电解所需的硫酸锌溶液。本发明的工艺流程优化、工艺操作控制简单、工程建设投资少。

Method of collecting gallium from igzo target

The present invention relates to a method of retrieving gallium from an IGZO target, which includes the steps: a) preparing a leach solution for IGZO; b) introducing a pH control agent into the leach solution to separate a sediment containing gallium ions from the leach solution; c) putting the sediment into a basic solution to prepare an electrolyte; d) applying electricity to the electrolyte to extract metal containing gallium from the electrolyte; and e) removing zinc by vacuum-refining the metal. According to the method of retrieving gallium from the IGZO target of the present invention, only gallium can be effectively extracted from the IGZO included in a solar cell or an OLED waste, so that the circulation of gallium, which is a rare metal, can be significantly increased. In addition, the purity of retrieved gallium is at least 99.9%, so that high-purity gallium product can be produced. The high-purity gallium product is eco-friendly in that the wasted IGZO target is used as a source material, and the rare resources can be recycled. [Reference numerals] (AA) Prepare a leach solution.; (BB) Introduce zinc.; (CC) Introduce a pH control agent.; (DD) Introduce a basic solution; (EE) Collect electrolyte.; (FF) Vacuum refining.; (GG) Gallium.; (HH) Retrieve indium.; (II) Collect gallium hydroxide.; (JJ) Collect zinc.

Process method for treating sodium ferbamate cobalt slag

本发明公开了一种处理福美钠钴渣的工艺方法，它包括以下步骤：（1）、酸洗脱锌，（2）、焙烧，（3）、水浸，（4）、萃取净化，（5）、草酸铵沉淀，（6）、草酸钴煅烧，所述焙烧包括向酸洗脱锌得到的酸洗渣中加入10~30wt%过硫酸钠，经过一段焙烧后再升温进行二段焙烧。本发明的有益效果是酸洗过程中常压低酸洗就能大部分回收锌，不需要使用高温加压浸出等强化手段，减少了设备投资和生产成本。硫酸钠作为焙烧添加剂，分解产生氧气为热分解提供了强化氧化气氛，生成的硫酸钠替代常用的浓硫酸，减少酸雾产生，还可破坏矿粒表层形成的致密氧化膜，使内层的氧化钴继续与O2、SO2、SO3接触，从而达到完全硫酸化，提高钴的回收率。

Method of extracting zinc oxide

FIELD: metallurgy. SUBSTANCE: invention relates to methods of separating zinc from a feedstock containing a mixture of metals and metal compounds. Method includes leaching a zinc-containing feedstock with a concentrated inorganic solution to form a suspension containing an insoluble substances and a mother solution with dissolved substances, separating insoluble substances from mother solution and precipitating zinc oxide from mother solution. Leaching is performed with a concentrated inorganic basic solution containing more than 25 wt% base containing a cation which does not form a complex with zinc, and zinc oxide is precipitated from mother solution by adding an anti-solvent to mother solution. After separation of insoluble substances from mother solution, it is cleaned to remove non-zinc substances dissolved in basic solution. EFFECT: lower solubility of zinc oxide in basic solution and possibility to regenerate both basic solution and anti-solvent for recycling in process of hydrometallurgical processing for saving costs. 32 cl, 2 tbl, 2 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 591 903 C2 (51) МПК C22B 19/00 (2006.01) C22B 3/12 (2006.01) C22B 19/34 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2014108468/02, 19.10.2011 (24) Дата начала отсчета срока действия патента: 19.10.2011 (72) Автор(ы): ЛОРИН, Мишель (CA), ПАСПЕК, Стивен С. (US) (73) Патентообладатель(и): КЭНЭДАС КЕМИКЭЛ, ЭлЭлСи (US) Приоритет(ы): (30) Конвенционный приоритет: R U 09.09.2011 US 13/229,188 (43) Дата публикации заявки: 20.10.2015 Бюл. № 29 (45) Опубликовано: 20.07.2016 Бюл. № 20 2 5 9 1 9 0 3 (56) Список документов, цитированных в отчете о поиске: RU 2119542 C1, 27.09.1998. US 6517789 B1, 11.02.2003. US 5204084 A, 20.04.1993. RU 2075524 C1, 27.09.1999. (85) Дата начала рассмотрения заявки PCT на национальной фазе: 09.04.2014 (86) Заявка PCT: 2 5 9 1 9 0 3 R U (87) Публикация заявки PCT: C 2 C 2 US 2011/056852 (19.10. ...

从锌冶炼的沉铟后液中去除钙镁的方法和装置

本发明公开了一种从锌冶炼的沉铟后液中去除钙镁的方法和装置，所述从锌冶炼的沉铟后液中去除钙镁的方法包括以下步骤：向所述沉铟后液中加入无水硫酸钙晶种和一水硫酸镁晶种；和在120℃‑200℃的条件下，利用赤铁矿除铁法去除所述沉铟后液中的铁，同时使所述沉铟后液中的钙和镁结晶析出，以便得到除铁钙镁后液，其中所述沉铟后液中的钙以无水硫酸钙的形式结晶析出，所述沉铟后液中的镁以一水硫酸镁的形式结晶析出。通过利用根据本发明实施例的从锌冶炼的沉铟后液中去除钙镁的方法，可以有效地去除该沉铟后液中的钙和镁。

Method for improving zinc oxygen pressure leaching rate by using calcine waste heat and oxygen pressure leaching kettle exhaust

本发明提供一种利用焙砂余热及氧压浸出釜排气提高锌氧压浸出率的方法，包括：将含氧的气液混合物I送至冷却机中，与锌焙砂进行间接换热，得到冷却焙砂和气液混合物II；将气液混合物II与电解废酸进行间接换热，得到预热废酸和气液混合物III，预热废酸返回氧压浸出釜；将气液混合物III通入密封的调浆槽中，与硫化锌精矿矿浆混合，释放压力，得到预热矿浆；将预热矿浆通入氧压浸出釜与预热废酸混合，与输入的氧气反应后得到浸出矿浆和含氧的气液混合物I，含氧的气液混合物I循环使用。该方法流程短，对矿石及工艺条件适应性好，可有效利用焙砂余热及氧压浸出釜排气余热，有助于提高锌氧压浸出技术指标，且浸出过程气液热均循环使用。