СПОСОБ ОСАЖДЕНИЯ НИКЕЛЯ

1. Способ восстановления никеля и кобальта из выщелачивающих растворов в присутствии железа и/или хрома, причем способ содержит этапы, на которых: ! i) добавляют восстановитель в выщелачивающий раствор, содержащий никель, кобальт и железо, так чтобы любое железо, присутствующее в виде сульфата трехвалентного железа, восстанавливается в сульфат двухвалентного железа и/или любой шестивалентный хром восстанавливается в трехвалентный хром; ! ii) нейтрализуют, по меньшей мере, часть свободной кислоты добавлением нейтрализующего агента; ! iii) дополнительно добавляют восстанавливающий агент, чтобы убедиться, что все присутствующее железо сохраняется в двухвалентной форме и/или любой хром сохраняется в трехвалентной форме; ! iv) нагревают раствор перед осаждением смешанного сульфида; ! v) добавляют затравку смешанного сульфида и сульфид водорода для выполнения осаждения никеля и кобальта в форме смешанного сульфида; и ! vi) поддерживают эту смесь в присутствии сульфида водорода на протяжении необходимого времени выдерживания для выполнения полного осаждения смешанного сульфидного продукта. ! 2. Способ по п.1, отличающийся тем, что восстановитель на этапе (i) и этапе (iii) содержит один или более сульфид водорода, гидросульфид натрия или диоксид серы. ! 3. Способ по п.1, отличающийся тем, что концентрация свободной кислоты находится в диапазоне приблизительно 0,5 - 3,5 г/л после нейтрализации. ! 4. Способ по п.1, отличающийся тем, что нейтрализующий агент этапа (ii) содержит любой один или более известняк, известь и калькрет. ! 5. Способ по п.1, отличающийся тем, что восстановление на этапе (i) проводят, по меньшей мере, при приблизительно 100°С � РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2008 126 770 (13) A (51) МПК C22B 3/20 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (71) Заявитель(и): МЮРРИН МЮРРИН ОПЕРЕЙШНЗ ЛТД (AU) (21), (22) Заявка: 2008126770/02, 10.01.2007 (30) Конвенционный приоритет: 10.01.2006 AU ...

Method for production of metallic cobalt from the nickel solvent extraction raffinate

PROCESS FOR RECOVERING NON-FERROUS METALS FROM A SOLID MATRIX

Method for production of metallic cobalt from the nickel solvetn extraction raffinate

Method for production of metallic cobalt from the nickel solvent extraction raffinate

Process for recovering nonferrous metals from a solid matrix

Method for production of metallic cobalt from the nickel solvent extraction raffinate

Process for recovering nonferrous metals from a solid matrix

PROCEDURE AND DEVICE FOR THE CONTROLLING OF THE SEPARATION OF A METAL

Dezincification plant, method for operating dezincification plant, and hydrometallurgical method for nickel oxide ore

The purpose of the present invention is to provide a hydrometallurgical method for nickel oxide ore, in which the plant can be smoothly started after completion of a periodic inspection because zinc sulfide separation imposes no load on the filter cloth and it is possible to reduce the amount of zinc remaining in a mother liquor (dezinced liquid) for nickel recovery to 1 mg/L or less. In the invention, after completion of a periodic inspection, the plant is started up in the following manner. In the beginning of the start-up, the neutralized liquid is not sulfided, and a switching valve (39) in feed piping (34) is switched so that the neutralized liquid is circulated to a dezincification tank (31) through circulatory piping (38). When the flow rate and/or temperature of the neutralized liquid being circulating has reached a given value or higher, the neutralized liquid is sulfided in the dezincification tank to yield a mother liquor for nickel recovery that contains zinc sulfide. The switching ...

Process for recovering non-ferrous metals from a solid matrix

The present invention relates to a process for recovering non-ferrous metals from a solid matrix comprising the following phases: (a) leaching the solid matrix with an aqueous-based solution containing chloride ions and ammonium ions and having a pH within the range of 6.5-8.5, in the presence of oxygen, at a temperature ranging from 100 °C to 160 °C and a pressure within the range of 150 kPa - 800 kPa, so as to obtain an extraction solution comprising the leached metals and a solid leaching residue; (b) separating said solid leaching residue from said extraction solution; (c) subjecting said extraction solution to at least one cementation so as to recover the metals in the elemental state.

Process for the recovery of nickel and/or cobalt from a leach solution

THE CEMENTATION OF COPPER

RECOVERY OF NICKEL FORM LATERITE ORES

PROCESS FOR PREPARING FINELY DIVIDED METAL POWDERS

PROCESS FOR PREPARING FINELY DIVIDED METAL POWDERS The invention relates to a process for preparing finely divided metal powders, which process is characterized in that metal salts are reacted with magnesium, to which a catalytic amount of anthracene and/or magnesium anthracene or of one of their derivatives has been added as an activator, in a solvent, and optionally in the presence of an inorganic support material.

COPPER CEMENTATION

CONTINUOUS PROCESS FOR THE PURIFICATION OF ZINC PLANT ELECTROLYTE

NICKEL RECOVERY PROCESS

Provided is a nickel recovery method that makes it possible to reduce the amount of nickel remaining in byproducts by recovering nickel from the byproducts of an electro-nickel manufacturing process which uses chlorine leaching, and that also enables a simpler cementation step to be simultaneously achieved. In a nickel recovery step S60, nickel recovery step S70, and nickel recovery step S80, an aqueous solution containing 80 to 390 g/L of chlorine and 30 to 70 g/L of copper is used to recover nickel from an S° slurry, residual flakes, and chlorine leaching residue, which are byproducts of an electro-nickel manufacturing process which uses chlorine leaching.

HYDRO METALLURGICAL METHOD FOR PRODUCTION OF PURE METALLIC MAGNESIUM AND VARIOUS BY-PRODUCTS

METHOD OF PROCESSING NICKEL - LATERITIC ORE

METHOD OF EXTRACTING NON-FERROUS METALS FROM SOLID BASE

Настоящее изобретение относится к способу извлечения цветных металлов из твердой основы, включающему следующие фазы: (а) выщелачивания твердой основы раствором на водной основе, содержащим ионы хлора и ионы аммония и имеющим рН в диапазоне 6,5-8,5, в присутствии кислорода при температуре от 100 до 160°С и давлении от 150 до 800 кПа для того, чтобы получить экстракционный раствор, содержащий выщелоченные металлы, и твердый остаток выщелачивания, (б) отделения указанного твердого остатка выщелачивания от указанного экстракционного раствора, (в) подвергания указанного экстракционного раствора по меньшей мере одной цементации для того, чтобы извлечь металлы в элементарном состоянии. The present invention relates to a method for extracting non-ferrous metals from a solid base, comprising the following phases: (a) leaching a solid base with an aqueous-based solution containing chlorine ions and ammonium ions and having a pH in the range of 6.5-8.5 in the presence of oxygen with temperature from 100 to 160 ° C and pressure from 150 to 800 kPa in order to obtain an extraction solution containing leached metals and a solid leaching residue, (b) separating said solid leach residue from said extraction solution, (c) adding rganiya specified extraction solution of at least one cementation in order to extract metals in an elemental state.

PROCESS FOR RECOVERING NON-FERROUS METALS FROM A SOLID MATRIX

HYDROMETALLURGICAL PROCESS TO PRODUCE PURE MAGNESIUM METAL AND VARIOUS BY-PRODUCTS

PROCEDE DE RECUPERATION DU NICKEL A PARTIR DE MINERAIS DE LATERITES

PROCEDE CONSISTANT, DANS LE CADRE D'UN PROCEDE DE RECUPERATION DU NICKEL ET DU COBALT A PARTIR D'UN MINERAI DE LATERITE ET COMPORTANT LA SOLUBILISATION DU NICKEL ET DU COBALT PAR UNE LIXIVIATION A L'ACIDE SULFURIQUE DANS UNE LIQUEUR RICHE, LA NEUTRALISATION DE CETTE LIQUEUR RICHE ET LA RECUPERATION DU NICKEL ET DU COBALT A PARTIR DE CETTE LIQUEUR NEUTRALISEE, LE PERFECTIONNEMENT CONSISTANT A PRECIPITER L'ALUMINIUM ET LE FER A PARTIR DE LADITE LIQUEUR EN METTANT EN CONTACT CETTE LIQUEUR RICHE AVEC UNE FRACTION A TENEUR ELEVEE EN MAGNESIUM DUDIT MINERAI DANS UNE LIXIVIATION A BASSE PRESSION A UNE TEMPERATURE COMPRISE ENTRE LA TEMPERATURE AMBIANTE ET A PEU PRES 200C ET A UNE PRESSION SUPERIEURE A LA PRESSION ATMOSPHERIQUE ET INFERIEURE A 2068,5 10 PASCALS ENVIRON.

A method for precipitating metals of solutions

Proceeded of extraction of the cobalt of the ores which contain it and particularly manganiferous cobalt ores

METHOD OF RECOVERING IRON CHLORIDE FROM BYPRODUCT OF NICKEL HYDROMETALLURGICAL PROCESS

The present invention provides a method of recovering an iron chloride hydrate crystal. The method of recovering the iron chloride hydrate crystal comprises: a step of preparing a nickel collection remainder concentrate by evaporating and concentrating a nickel collection remainder generated during a nickel hydrometallurgical process; and a step of forming an iron chloride hydrate crystal by decompressing, concentrating, and crystallizing the nickel collection remainder concentrate in a pressure of 40-300 Mbar and a temperature of 30-90°C. According to the present invention, the iron chloride hydrate crystal, specifically, an iron chloride dihydrate crystal and an iron chloride tetrahydrate crystal are collected from the nickel collection remainder generated during the nickel hydrometallurgical process at a high grade. Moreover, when required, concentration of impurities and a crystallization condition (decompression concentration condition) among the concentrate of the nickel remainder ...

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.

Method for producing cobaltic hexamine compounds and cobalt metal powder

Cobalt is recovered by treating aqueous solutions containing ammonia and cobalt ions with a sufficient amount of an acid in the presence of a catalyst to convert the cobalt ions to a cobalt hexammine ion which is precipitated and separated from the resulting solution. According to another aspect of the invention, a cobalt compound is precipitated from an aqueous solution of cobaltic hexammine halide by treating the solution with a metallic hydroxide and the precipitate is subsequently reduced to form fine cobalt powder.

Improvements in recovery of nickel with or without cobalt from hydrometallurgical solutions

Nickel and cobalt sulphides are precipitated from nickeliferous sulphate solutions by the action of metallic iron and elemental sulphur coated with an alkali metal sulphide. The reaction mixture may be agitated to keep the sulphur and sulphur products in suspension while the iron particles remain at or near to the bottom of the reaction tank. Preferably ferric ions present in the solution are reduced to ferrous ions, prior to the precipitation step, by treatment of the solution with pyrrhotite concentrate at a temperature of 65 DEG to 75 DEG C. The coating of the sulphur particles may be achieved by mixing in an agitated tank sulphur flour, an equivalent quantity of water, a wetting agent and sodium sulphide in an amount of 5% of the sulphur. Solutions containing nickel, cobalt, copper, iron and sodium may be treated to precipitate the nickel and cobalt. Specificatio 769,267 is referred to.

Method for the precipitation of nickel

Method for the precipitation of nickel

Liquid-storage device and pressure-control method thereof

By means of installation improvements specifically in a liquid-storage tank from among sulfidation installations at which a sulfidation reaction is performed in the hydrometallurgy of nickel oxide ore, the present disclosures reduce the amount of hydrogen sulfide gas used in a sulfidation step and the amount of alkali used in exhaust gas treatment, reducing operating costs. Disclosed is a liquid-storage device, which is used in a sulfidation installation that generates sulfides by causing the sulfidation of a sulfate solution, and which is provided with: a plurality of liquid-storage tanks (11

Nickel recovery method

Provided is a nickel recovery method that makes it possible to reduce the amount of nickel remaining in byproducts by recovering nickel from the byproducts of an electro-nickel manufacturing process which uses chlorine leaching, and that also enables a simpler cementation step to be simultaneously achieved. In a nickel recovery step S60, nickel recovery step S70, and nickel recovery step S80, an aqueous solution containing 80 to 390 g/L of chlorine and 30 to 70 g/L of copper is used to recover nickel from an S° slurry, residual flakes, and chlorine leaching residue, which are byproducts of an electro-nickel manufacturing process which uses chlorine leaching.

Method for producing high-purity nickel sulfate

Provided is a method for producing nickel sulfate yielding high-purity nickel sulfate using a method for removing an impurity element to selectively remove Mg from a solution containing Ni. A process for producing nickel sulfate from an acidic solution containing Ni is characterized in that a solution containing Ni is treated sequentially in steps (1) to (3): (1) a carbonation step for adding a carbonating agent to a solution containing Ni, forming the Ni contained in the Ni-containing solution into a precipitate of nickel carbonate or a mixture comprising nickel carbonate and nickel hydroxide, and producing a carbonated slurry comprising this precipitate and carbonated solution; (2) a solid-liquid separation step for separating the carbonated slurry produced in the carbonation step (1) into the precipitate and carbonated solution; and (3) a neutralization step for adding a neutralizing agent to the carbonated solution separated through the solid-liquid separation step (2), and recovering ...

RECOVERY OF METALLIC NICKEL OR COBALT FROM THEIR RESPECTIVE AQUEOUS SOLUTIONS

COPPER CEMENTATION

A nickel matte which has been subjected to a partial leach with chlorine and/or oxygen in the presence of a cuprous ion bearing aqueous solution is subsequently used as an agent for cementing copper out of solution.

NICKEL RECOVERY PROCESS

A nickel recovery process capable of decreasing nickel remaining in a byproduct by recovering nickel from the byproduct of electrolytic nickel manufacturing process by chlorine-leaching, and also, capable of simplifying a cementation step simultaneously, is provided. In a nickel recovery step S60, a nickel recovery step S70 and a nickel recovery step S80, nickel is recovered in each step from S0 slurry, residue flaker and chlorine-leached residue, which are byproducts of electrolytic nickel manufacturing process by chlorine-leaching, by using an aqueous solution containing 80 g/L to 390 g/L of chlorine and 30 g/L to 70 g/L of copper.

METHOD FOR RECYCLING VALUABLE METALS FROM SPENT BATTERIES

A process has been developed to recover and recycle the metals present in spent batteries, including alkaline spent batteries alone or mixed with other types of spent batteries. This method shows a good potential in terms of metals recoveries efficiencies and economic feasibility. Firstly, the spent batteries are crushed (optionally after having been frozen in the case of spent batteries of mixed types). Then, the undesirable parts (plastics, steel cases, papers, etc.) are removed by screening. The collected powder, containing the metals, is mixed with a solution of sulfuric acid in the presence of a reducing agent. The solid/liquid separation is carried out by filtration and the leachate is purified in order to selectively recover the metals. The purification steps consist of: a) recovering Zn by solvent extraction followed by an electrowinning process; b) simultaneously recovering Mn and Cd by solvent extraction process; c) selectively recovering Cd from the mixture solution of Cd and Mn by electrowinning process; d) precipitating Mn from a pure solution of MnSO4 in a carbonate form; e) removing the impurities present in the effluent by solvent extraction in order to obtain a pure NiSO4 solution; f) precipitating Ni from a NiSO4 solution in a carbonate form.

PROCESS FOR RECOVERING NON-FERROUS METALS FROM A SOLID MATRIX

The present invention relates to a process for recovering non-ferrous metals from a solid matrix comprising the following phases: (a) leaching the solid matrix with an aqueous-based solution containing chloride ions and ammonium ions and having a pH within the range of 6.5-8.5, in the presence of oxygen, at a temperature ranging from 100 °C to 160 °C and a pressure within the range of 150 kPa - 800 kPa, so as to obtain an extraction solution comprising the leached metals and a solid leaching residue; (b) separating said solid leaching residue from said extraction solution; (c) subjecting said extraction solution to at least one cementation so as to recover the metals in the elemental state.

СПОСОБ ПЕРЕРАБОТКИ НИКЕЛЬ-ЛАТЕРИТНЫХ РУД

Изобретение относится к способу переработки латеритных руд, при котором металлы, содержащиеся в латеритах, переводят в водорастворимую форму для извлечения ценных металлов, таких как никель и кобальт. Различные типы никелевых латеритов перерабатывают одновременно без разделения их по содержанию железа и/или магния. Когда латериты предварительно обрабатывают концентрированной неорганической кислотой так, что металлы, содержащиеся в латеритах вступают в реакцию с образованием водорастворимых солей, силикаты, содержащиеся в латеритах частично разлагаются, и при последующем выщелачивании становится легче проводить разделение на твердую и жидкую фазы, чем это было возможно ранее. В соответствии со способом, образовавшийся на стадии реакции руды с кислотой водяной пар используют для сушки руды, а непрореагировавшую неорганическую кислоту возвращают в начало процесса.

СПОСОБ И УСТАНОВКА ДЛЯ РЕГУЛИРОВАНИЯ РАЗДЕЛЕНИЯ МЕТАЛЛОВ

The invention relates to a method and apparatus for controlling a continuous metal removal in conjunction with a zinc preparation process, in which the metal removal is performed in one or more reactors (11a-c), in conjunction with the reactor, the redox potential (16a-c) and the acidity and/or basicity are measured, and based on the measurement results, the process variables (17a-c) of the metal removal are adjusted towards the desired direction. According to the invention, the redox potential measurements (16a-c) are performed from the sludge produced in the reactor in conjunction with the outlet pipe of the reactor outside the reactor, and the measuring instrument (16a-c) is purified at predetermined intervals.

Process of separation of the nickel contained in the cobaltiferous solutions

IMPROVEMENTS WITH THE CEMENTING OF COPPER

Nickel and cobalt recovery - from soln by treatment under pressure with iron powder

Process for removing transition metal ions from an aqueous solution with a reticular ion exchange resin containing a crystalline transition metal aluminate

VERFAHREN ZUR HERSTELLUNG VON FEINVERTEILTEN METALLPULVERN.

Production of high grade nickel product

A process for the production of a high grade nickel product including the steps of: a) providing at least one heap of a nickeliferous lateritic ore and leaching that heap with a suitable lixiviant, preferably sulfuric acid solution, to produce a nickel rich pregnant leach solution (PLS); b) subjecting the PLS to an impurity removal step to precipitate ferric iron, and preferably partially precipitate aluminium and chromium as hydroxides; and c) recovering a high grade nickel product from the PLS preferably by either nickel ion exchange, solvent extraction, electrowinning, conventional multi-stage neutralization, pyrohydrolysis or sulfidation.

METHOD FOR PRODUCING HIGH-PURITY NICKEL SULFATE

Provided is a method for producing nickel sulfate yielding high-purity nickel sulfate using a method for removing an impurity element to selectively remove Mg from a solution containing Ni. A process for producing nickel sulfate from an acidic solution containing Ni is characterized in that a solution containing Ni is treated sequentially in steps (1) to (3): (1) a carbonation step for adding a carbonating agent to a solution containing Ni, forming the Ni contained in the Ni-containing solution into a precipitate of nickel carbonate or a mixture comprising nickel carbonate and nickel hydroxide, and producing a carbonated slurry comprising this precipitate and carbonated solution; (2) a solid-liquid separation step for separating the carbonated slurry produced in the carbonation step (1) into the precipitate and carbonated solution; and (3) a neutralization step for adding a neutralizing agent to the carbonated solution separated through the solid-liquid separation step (2), and recovering the Ni contained in the carbonated solution as a precipitate of Ni.

HYDROMETALLURGICAL PROCESS TO PRODUCE PURE MAGNESIUM METAL AND VARIOUS BY-PRODUCTS

The present description relates to a process for producing magnesium metal from magnesium-bearing ores using serpentine. The process described herein consists generally in a mineral preparation and classification followed by leaching with dilute hydrochloric acid. The slurry is filtered and the non-leached portion, containing amorphous silica is recovered. The residual solution is neutralized and purified by chemical precipitation with non activated and activated serpentine. The nickel is also recovered by precipitation at higher pH. A final neutralisation and purification step of magnesium chloride solution by precipitation allows eliminating any traces of residual impurities. The purified magnesium chloride solution is evaporated until saturation and the MgCl2.6H2O is recovered by crystallization in an acid media. The salt is dehydrated and subsequent electrolysis of anhydrous magnesium chloride produces pure magnesium metal and hydrochloric acid.

RECOVERY OF METALLIC NICKEL OR COBALT FROM THEIR RESPECTIVE AQUEOUS SOLUTIONS

PROCESS FOR RECOVERING RARE EARTH METAL FROM OXIDE ORE BY CONCENTRATION AND SEPARATION

A process for recovering scandium economically with high efficiency by concentration and separation from an oxide ore containing nickel and a small amount of scandium as well as a large amount of iron and/or aluminum comprises the steps of acid leaching the oxide ore under a high-temperature, high-pressure oxidative atmosphere while restraining leaching of the iron and/or aluminum, thereby selectively leaching substantially all nickel and scandium from the ore, recovering the nickel from the resulting leaching solution as a precipitated sulfide while not precipitating the scandium as a sulfide but leaving the total amount thereof in the solution, and then adjusting the pH of the solution with a precipitant to recover the scandium from the solution as a high-concentration scandium hydroxide or carbonate by concentration and separation.

Process of recovery of nickel or metal cobalt starting from salt solutions of these two metals

Improvements relating to the processes of containing treatment of materials of nickel

니켈 습식제련 공정의 부산물 회수방법

... 본 발명은 니켈(Ni) 및 철(Fe)을 함유하는 니켈 광석으로부터 염소이온을 함유하는 산 용액을 사용하여 니켈을 회수하는 니켈 습식 제련 공정에서 상기 니켈을 회수한 후에 배출되는 염화철을 포함하는 여액으로부터 부산물을 회수하는 니켈 습식제련 공정의 부산물 회수 방법에 있어서, 상기 염화철을 포함하는 여액을 양극셀과 음극셀이 음이온 교환막에 의해 구획된 제1전기분해 장치를 이용하여 전기분해하여 금속 철을 환원석출하고, 제1분해액을 얻는 단계, 및 상기 제1분해액을 양극셀과 음극셀이 음이온 교환막에 의해 구획된 제2전기분해 장치를 이용하여 전기분해하여 금속 망간(Mn)을 환원석출하는 단계를 더 포함하는, 니켈 습식제련 공정의 부산물 회수방법을 제공하며, 이에 따르면, 니켈 제련 공정 중에 발생하는 염화철 함유 여액으로부터 금속 철, 염산, 수산화마그네슘을 회수할 수 있으며, 특히, 염산의 회수율이 매우 높으며 공정이 단순한 효과가 있다.

IMPROVED METHOD FOR PRODUCING COBALT METAL POWDER

Fine particle size cobalt metal powder is prepared by treating an aqueous solution of a soluble cobaltic ammine halide with a sufficient amount of a soluble metallic hydroxide to form a cobalt containing precipitate. The precipitate is separated from the solution and reduced in a reducing atmosphere to produce metallic cobalt.

DEZINCIFICATION PLANT, METHOD FOR OPERATING DEZINCIFICATION PLANT, AND HYDROMETALLURGICAL METHOD FOR NICKEL OXIDE ORE

PRODUCTION OF FINELY DIVIDED METAL POWDER

Gewinnung von Kobalt aus kobalthaltigen Abfalloesungen

Method for production of metallic cobalt from the nickel solvent extraction raffinate

... "Method for production of metallic cobalt from the raffinate from solvent extraction of nickel". Said method comprises the following stages: (A) obtaining the raffinate from solvent extraction of nickel, for production of cobalt; (B) adding a sulfide precipitation agent to said raffinate, for cobalt sulfide and zinc sulfide precipitation; (C) removing all ammonia from the sulfidized pulp (solids and liquid); (D) subjecting the filtered solid - cobalt sulfide (and impurities) - to atmospHeric leaching; (E) reducing to a minimum the zinc concentration in the cobalt round, by means of solvent extraction with D2EPHA extractant diluted in Escaid 110 solvent or equivalent solvent, in any solvent extraction system comprising the required number of extraction, scrubbing, and stripping stages, with resident time of not less than 1 minute at each of the stages used; (F) performing nickel removal by ion exchange, for nickel purification; (G) adding sodium carbonate to the solution, for cobalt carbonate ...

PROCEDURE FOR THE PRODUCTION OF FINELY DIVIDED METALLIC POWDERS.

Method for producing high-purity nickel sulfate

The purpose of the present invention is to provide a method for producing a high-purity nickel sulfate with less impurities, especially with less magnesium or less chlorides by regulating the concentration of the extractant and the pH concentration during the processing in a step for obtaining a nickel sulfate solution with high nickel concentration by means of solvent extraction using an acidic organic extractant. A method for producing a high-purity nickel sulfate, which is characterized by processing an acidic solution containing nickel through at least the following steps: a sulfurization step wherein a sulfurizing agent is added into the acidic solution containing nickel, thereby obtaining a sediment of a nickel sulfide and a liquid after sulfurization; a redissolving step wherein a slurry of the nickel sulfide obtained in the sulfurization step is prepared and an oxidant is added into the slurry, thereby obtaining a concentrated solution of nickel; a liquid cleaning step wherein the ...

METALLIC NICKEL AND COBALT FROM SOLUTION

CONTINUOUS PROCESS FOR THE PURIFICATION OF ZINC PLANT ELECTROLYTE

Continuous process for the purification of zinc plant electrolyte employing copper arsenate for the removal of cobalt and associated impurities in a four-step treatment comprising: (1) cementation of copper with fine zinc dust, (2) precipitation of the major portion of cobalt by the addition of coarse zinc dust, dilute sulfuric acid and copper arsenate, (3) further addition of coarse zinc dust and dilute acid to precipitate more cobalt and reduce the cobalt level in said electrolyte to about 1.0 ppm, and (4) further addition of coarse zinc dust and dilute acid to reduce the cobalt level in said electrolyte to less than about 0.1 ppm.

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.

METHOD AND APPARATUS FOR CONTROLLING METAL SEPARATION

The invention relates to a method and apparatus for controlling a continuous metal removal in conjunction with a zinc preparation process, in which the metal removal is performed in one or more reactors (11a-c), in conjunction with the reactor, the redox potential (16a-c) and the acidity and/or basicity are measured, and based on the measurement results, the process variables (17a- c) of the metal removal are adjusted towards the desired direction. According to the invention, the redox potential measurements (16a-c) are performed from the sludge produced in the reactor in conjunction with the outlet pipe of the reactor outside the reactor, and the measuring instrument (16a-c) is purified at predetermined intervals.

METHOD FOR THE PRECIPITATION OF NICKEL

A method (10) for the recovery of nickel and cobalt from leach solutions in the presence of iron and/or chrome, the method comprising the steps of: i) adding a reductant (13) to a leach solution containing nickel, cobalt and iron, such that any iron present as ferric sulphate is reduced to ferrous sulphate and/or any hexavalent chrome is reduced to trivalent chrome; ii) neutralising (14) at least a portion of the free acid through addition of a neutralising agent; iii) further addition of the reducing agent (15) to ensure all iron present remains in the ferrous form and/or any chrome remains in the trivalent form; iv) heating the solution prior to mixed sulphide precipitation; v) adding a mixed sulphide seed (21) and hydrogen sulphide (22) to effect precipitation (20) of the nickel and cobalt in the form of a mixed sulphide product (24); and vi) maintaining this mixture in the presence of hydrogen sulphide (22) for the required residence time to effect complete precipitation of the mixed sulphide product (24).

PROCESS OF RECOVERY OF NICKEL FROM LATERITE ORES

PROCEDE CONSISTANT, DANS LE CADRE D'UN PROCEDE DE RECUPERATION DU NICKEL ET DU COBALT A PARTIR D'UN MINERAI DE LATERITE ET COMPORTANT LA SOLUBILISATION DU NICKEL ET DU COBALT PAR UNE LIXIVIATION A L'ACIDE SULFURIQUE DANS UNE LIQUEUR RICHE, LA NEUTRALISATION DE CETTE LIQUEUR RICHE ET LA RECUPERATION DU NICKEL ET DU COBALT A PARTIR DE CETTE LIQUEUR NEUTRALISEE, LE PERFECTIONNEMENT CONSISTANT A PRECIPITER L'ALUMINIUM ET LE FER A PARTIR DE LADITE LIQUEUR EN METTANT EN CONTACT CETTE LIQUEUR RICHE AVEC UNE FRACTION A TENEUR ELEVEE EN MAGNESIUM DUDIT MINERAI DANS UNE LIXIVIATION A BASSE PRESSION A UNE TEMPERATURE COMPRISE ENTRE LA TEMPERATURE AMBIANTE ET A PEU PRES 200C ET A UNE PRESSION SUPERIEURE A LA PRESSION ATMOSPHERIQUE ET INFERIEURE A 2068,5 10 PASCALS ENVIRON. PROCESS CONSISTING, IN THE FRAMEWORK OF A PROCESS FOR RECOVERING NICKEL AND COBALT FROM A LATERITE ORE AND INCLUDING THE SOLUBILIZATION OF NICKEL AND COBALT BY LIXING WITH SULFURIC ACID IN A LIQUEUR RICH FROM NEUTRALIZATION THIS RICH LIQUEUR AND THE RECOVERY OF THE NICKEL AND COBALT FROM THIS NEUTRALIZED LIQUEUR, THE IMPROVEMENT CONSISTING OF PRECIPITATE THE ALUMINUM AND THE IRON FROM THE SAID LIQUEUR BY CONTACTING THIS RICH LIQUEUR IN A MAGNICAL FRACTION WITH A FRACTION ORE IN LOW PRESSURE LEACHING AT A TEMPERATURE BETWEEN ROOM TEMPERATURE AND NEAR 200C AND AT A PRESSURE ABOVE ATMOSPHERIC PRESSURE AND LESS THAN 2068.5 10 PASCALS APPROXIMATELY.

Process of separation of cobalt and nickel

高純度硫酸ニッケルの製造方法

Recovering nickel

Nickel is obtained from nickel sulphide (produced from nickel oxide ore) by causing a cementation reaction with copper ions, separating a solution from a residue and leaching the residue with chlorine. The copper may present as CuCl 2 and may come from nickel matte containing copper which is added to the starting materials. The cementation reaction may be performed with an oxidation-reduction potential as measured by silver-silver chloride electrode of below -20mV.

Nickel refining method

Process for the separation of nickel from solutions containing cobalt and nickel salts

Nickel is separated from an aqueous solution containing a mixture of cobalt and nickel salts by first precipitating the nickel by adding a metal more electronegative than nickel, for example iron, and also one or more metalloidic compounds formed between sulphur, selenium or tellurium on the one hand, and antimony or arsenic on the other. The separated nickel is then redissolved and the metalloidic compounds regenerated for further use. Copper may also be added in the first stage of the process, either as a soluble salt, the amount of copper added being 0.3-2% by weight of the nickel, or as the sulphide, the copper being 10-25% by weight of the nickel. The first stage may be carried out at 50-100 DEG C. and at a pH of approximately 2.5. Suitable metalloidic compounds include arsenic and antimony sulphides, which may be naturally occurring, such as realgars, orpiments, and stibnites and may be employed in an amount 1-2 times by weight of the nickel present in the solution ...

PROCESS FOR PURIFYING NICKEL SULPHATE SOLUTION

Improvements in or relating to processes of treating nickel bearing materials

A solution containing nickel, and also copper and iron is treated with a metallic powder containing nickel to cement the copper, and to reduce the hydrogen ion concentration to such an extent as to permit of precipitation of ferric hydroxide on aeration, whereby a purified nickel solution is obtained, the acid set free restoring the hydrogen ion concentration approximately to its normal value appropriate for electrodeposition of nickel. Preferably, a low-temperature, gas-reduced nickeliferous powder is used, but reduction may be effected by charcoal. In an application of the process, pulverized nickel-bearing materials such as Bessemer mattes, or nickel bottoms produced by the Orford process, are desulphurized by roasting, preferably in a down-draught sintering apparatus, and may then be leached with sulphuric acid to remove copper. The residue is divided into two portions, constituting 95-97 and 3-5 per cent respectively. The minor part is ground and reduced preferably at 300-500 DEG C., for example by water gas. The major part is reduced with coke, coal or charcoal at 1500-1550 DEG C. to form nickel anodes, which are placed in the anode compartment of an electrolytic cell separated from the cathode compartment by a pervious diaphragm. The electrolyte flows from the latter compartment to the former at a velocity of 0,0006-0-0008 ft./min. It is removed preferably continuously from the anode compartment, heated say to 55 DEG C. and treated with the nickeliferous powder produced from the minor portion above-referred to so as to reduce the hydrogen ion concentration to a pH value of 5,6 or higher. After separation of the cemented copper, ferric hydroxide is precipitated from the solution at 60-90 DEG C. by air, and separated. The solution, if necessary, after adjustment of the pH value to 4,5-5,6 by the addition of sulphuric acid, is returned to the cathode compartment. The composition of the electrolyte, which contains nickel as the sulphate, is specified. Boric acid ...

METHOD FOR RECYCLING VALUABLE METALS FROM SPENT BATTERIES

A process has been developed in order to recover and recycle the metals present in spent batteries, including alkaline spent batteries alone or mixed with other types of spent batteries. This method shows a good potential in terms of metals recoveries efficiencies and economic feasibility. Firstly, the spent batteries are crushed (optionally after having been frozen in the case of spent batteries of mixed types). Then, the undesirable parts (plastics, steel cases, papers, etc...) are removed by screening. The collected powder, containing the metals, is mixed with a solution of sulfuric acid in the presence of a reducing agent. The solid/liquid separation is carried out by filtration and the leachate is purified in order to selectively recover the metals. The purification steps consist of: a) recovering Zn by solvent extraction followed by an electrowinning process; b) simultaneously recovering Mn and Cd by solvent extraction process; c) selectively recovering Cd from the mixture solution ...

METHOD FOR PRODUCING COBALTIC HEXAMMINE COMPOUNDS AND COBALT METAL POWDER

METHOD FOR PRODUCING HIGH-PURITY NICKEL SULFATE

Provided is a method for producing nickel sulfate yielding high-purity nickel sulfate using a method for removing an impurity element to selectively remove Mg from a solution containing Ni. A process for producing nickel sulfate from an acidic solution containing Ni is characterized in that a solution containing Ni is treated sequentially in steps (1) to (3): (1) a carbonation step for adding a carbonating agent to a solution containing Ni, forming the Ni contained in the Ni-containing solution into a precipitate of nickel carbonate or a mixture comprising nickel carbonate and nickel hydroxide, and producing a carbonated slurry comprising this precipitate and carbonated solution; (2) a solid-liquid separation step for separating the carbonated slurry produced in the carbonation step (1) into the precipitate and carbonated solution; and (3) a neutralization step for adding a neutralizing agent to the carbonated solution separated through the solid-liquid separation step (2), and recovering the Ni contained in the carbonated solution as a precipitate of Ni.

PROCESS FOR RECOVERING NON-FERROUS METALS FROM A SOLID MATRIX

The present invention relates to a process for recovering non-ferrous metals from a solid matrix comprising the following phases: (a) leaching the solid matrix with an aqueous-based solution containing chloride ions and ammonium ions and having a pH within the range of 6.5-8.5, in the presence of oxygen, at a temperature ranging from 100 °C to 160 °C and a pressure within the range of 150 kPa - 800 kPa, so as to obtain an extraction solution comprising the leached metals and a solid leaching residue; (b) separating said solid leaching residue from said extraction solution; (c) subjecting said extraction solution to at least one cementation so as to recover the metals in the elemental state.

PROCESS FOR RECOVERY OF NICKEL AND COBALT FROM LATERITE ORE

A process for recovering nickel and cobalt values from nickel- and cobalt- containing laterite ores as an enriched mixed nickel and cobalt sulphide intermediate and for producing nickel and cobalt metal from the nickel and cobalt sulphide intermediate. The laterite ore is leached as a slurry in a pressure acid leach containing an excess of aqueous sulphuric acid at high pressure and temperature, excess free acid in the leach slurry is partially neutralized to a range of 5 to 10 g/L residual free H2SO4 and washed to yield a nickel- and cobalt-containing product liquor, the product liquor is subjected to a reductant to reduce any Cr(VI) in solution to Cr(III), the reduced product liquor is neutralized to precipitate ferric iron and silicon at a pH of about 3.5 to 4.0, and the neutralized and reduced product liquor is contacted with hydrogen sulphide gas to precipitate nickel and cobalt sulphides. The precipitated nickel and cobalt sulphides can be leached in a water slurry in a pressure oxidation ...

Method for producing high-purity nickel sulfate

The purpose of the present invention is to provide a method for producing a high-purity nickel sulfate with less impurities, especially with less magnesium or less chlorides by regulating the concentration of the extractant and the pH concentration during the processing in a step for obtaining a nickel sulfate solution with high nickel concentration by means of solvent extraction using an acidic organic extractant. A method for producing a high-purity nickel sulfate, which is characterized by processing an acidic solution containing nickel through at least the following steps: a sulfurization step wherein a sulfurizing agent is added into the acidic solution containing nickel, thereby obtaining a sediment of a nickel sulfide and a liquid after sulfurization; a redissolving step wherein a slurry of the nickel sulfide obtained in the sulfurization step is prepared and an oxidant is added into the slurry, thereby obtaining a concentrated solution of nickel; a liquid cleaning step wherein the ...

Recovery of nickel by cementation

Nickel is recovered on an industrial scale by cementation from soln of its salts. A metal powder of suitable particle size distribution and specific surface, and being more electronegative than Ni, is added to the soln and maintained in suspension by vigourous agitation until the pptn process is complete. The Ni powder obtained is extremely fine with a high specific surface and chem. purity, it is esp suitable for the mfe. of catalysts, battery electrodes or membranes for isotropic sepn.

Method for separating cobalt and nickel

METHOD AND APPARATUS FOR CONTROLLING METAL SEPARATION

The invention relates to a method and apparatus for controlling a continuous metal removal in conjunction with a zinc preparation process, in which the metal removal is performed in one or more reactors (11a-c), in conjunction with the reactor, the redox potential (16a-c) and the acidity and/or basicity are measured, and based on the measurement results, the process variables (17a-c) of the metal removal are adjusted towards the desired direction. According to the invention, the redox potential measurements (16a-c) are performed from the sludge produced in the reactor in conjunction with the outlet pipe of the reactor outside the reactor, and the measuring instrument (16a-c) is purified at predetermined intervals. © KIPO & WIPO 2007 ...

Method for producing fine cobalt metal powder

A method is disclosed for producing fine cobalt metal powder which comprises adding to a solution of cobaltous chloride, sodium hydroxide in an amount equal to at least the stoichiometric amount required to form a precipitate of the major portion of the cobalt as cobaltous hydroxide and a mother liquor containing the balance of the starting cobalt, separating the precipitate from the mother liquor, water washing the precipitate to remove essentially all of the sodium therefrom, and reducing the precipitate to fine cobalt metal powder having an FSSS of from about 0.5 to about 2.0. Drying of the precipitate before reduction results in the fine cobalt metal powder having essentially no tailings.

Process for the recovery of cobalt

... Cobalt is recovered by contacting a waste solution containing divalent iron and divalent cobalt obtained from the iron cementation of cuprous chloride suspension containing cobalt as an impurity, obtained by copper cementation of an aqueous solution obtained by leaching chlorinated roasted burnt pyrites, with a quantity of an impure cobaltic hydroxide sludge more than sufficient to react with the whole of the divalent iron whereby the cobalt is reduced and passes into solution which is separated from the residual sludge. The cobaltic hydroxide sludge may be obtained as shown in Fig. 1 where the starting solution 1a is obtained by treating with cement copper, copper, zinc and cobalt containing solutions obtained by leaching chlorinated roasted burnt pyrites, thereby precipitating cuprous chloride which is separated and leaving a solution 1a which is treated as shown in the cementation stage of Fig. 1 with scrap iron thereby cementing out the copper ...

Production of high grade nickel product

A process for the production of a high grade nickel product including the steps of: a) providing at least one heap of a nickeliferous lateritic ore and leaching that heap with a suitable lixiviant, preferably sulfuric acid solution, to produce a nickel rich pregnant leach solution (PLS); b) subjecting the PLS to an impurity removal step to precipitate ferric iron, and preferably partially precipitate aluminium and chromium as hydroxides; and c) recovering a high grade nickel product from the PLS preferably by either nickel ion exchange, solvent extraction, electrowinning, conventional multi-stage neutralization, pyrohydrolysis or sulfidation.

LEACHING WITH A SOLUTION CONTAINING NITROGENEOUS COMPOUNDS

METHOD FOR PRODUCING COBALT METAL POWDER

IMPROVED METHOD FOR PRODUCING COBALT METAL POWDER Fine particle size cobalt metal powder is prepared by treating an aqueous solution of a soluble cobaltic ammine halide with a sufficient amount of a soluble metallic hydroxide to form a cobalt containing precipitate. The precipitate is separated from the solution and reduced in a reducing atmosphere to produce metallic cobalt.

METHOD FOR PRODUCING COBALTIC HEXAMMINE COMPOUNDS AND COBALT METAL POWDER

Cobalt is recovered by treating aqueous solutions containing ammonia and cobalt ions with a sufficient amount of an acid in the presence of a catalyst to convert the cobalt ions to a cobalt hexammine ion which is precipitated and separated from the resulting solution. According to another aspect of the invention, a cobalt compound is precipitated from an aqueous solution of cobaltic hexammine halide by treating the solution with a metallic hydroxide and the precipitate is subsequently reduced to form fine cobalt powder. 21,987 ...

AQUEOUS COBALT CHLORIDE SOLUTION REFINEMENT METHOD

... [Problem] To provide an aqueous cobalt chloride solution purification method capable of efficiently removing impurities from a cobalt salt solution. [Solution] A method for bringing metallic nickel into contact with an aqueous cobalt chloride-containing solution to remove impurities by a cementation reaction, wherein the metallic nickel is washed with an acidic solution of pH 2.5 or less prior to bringing the metallic nickel into contact with the aqueous cobalt chloride-containing solution. Since the metallic nickel is washed with an acidic solution of pH 2.5 or less, the passive film on the surface of the metallic nickel is removed. Since the passive film has been removed, when the metallic nickel is brought into contact with the aqueous cobalt chloride-containing solution, impurities that are more electropositive than metallic nickel can be precipitated by a cementation reaction. Moreover, since the metallic nickel need only be washed with acid and brought into contact with the aqueous ...

PROCESS FOR RECOVERY OF NICKEL AND COBALT FROM LATERITE ORE

A process for recovering nickel and cobalt values from nickel- and cobalt- containing laterite ores as an enriched mixed nickel and cobalt sulphide intermediate and for producing nickel and cobalt metal from the nickel and cobalt sulphide intermediate. The laterite ore is leached as a slurry in a pressure acid leach containing an excess of aqueous sulphuric acid at high pressure and temperature, excess free acid in the leach slurry is partially neutralized to a range of 5 to 10 g/L residual free H2SO4 and washed to yield a nickel- and cobalt-containing product liquor, the product liquor is subjected to a reductant to reduce any Cr(VI) in solution to Cr(III), the reduced product liquor is neutralized to precipitate ferric iron and silicon at a pH of about 3.5 to 4.0, and the neutralized and reduced product liquor is contacted with hydrogen sulphide gas to precipitate nickel and cobalt sulphides. The precipitated nickel and cobalt sulphides can be leached in a water slurry in a pressure oxidation ...

METHOD FOR PRODUCING HIGH-PURITY NICKEL SULFATE

Provided is a production method for obtaining high purity nickel sulfate having low levels of impurities, particularly low levels of magnesium and chloride, by adjusting the concentration of an extractant and the pH concentration at the time of treatment in a process of obtaining a nickel sulfate solution having a high nickel concentration by solvent extraction using an acidic organic extractant. The method includes treating an acidic solution containing nickel through at least the following steps of: a sulfurization step of adding a sulfurizing agent to the acidic solution containing nickel, and obtaining a precipitate of nickel sulfide and a solution after sulfurization; a redissolution step of preparing a slurry of the nickel sulfide obtained in the sulfurization step, adding an oxidizing agent to the slurry, and thereby obtaining a concentrated solution of nickel; a solution purification step of subjecting the concentrated solution of nickel obtained in the redissolution step to neutralization ...

LEACHING WITH A SOLUTION CONTAINING NITROGENEOUS COMPOUNDS

Method for treating nickel laterite ore

The invention relates to a method for processing laterite ores so that the metals contained in the laterites are turned into water-soluble form for the recovery of valuable metals, such as nickel and cobalt. Different types of nickel laterites are processed at the same time without being separated according to their iron and/or magnesium content. When laterites are pretreated with concentrated mineral acid so that the metals contained in the laterites react to form water-soluble salts, the silicates contained in the laterites are partially decomposed and postleaching liquid-solid separation becomes easier than it was previously. According to the method, the water vapour generated in the ore and acid reaction stage is utilised in ore drying and the unreacted mineral acid is recycled to the front end of the process.

Hydrometallurgical process to produce pure magnesium metal and various by-products

PROCESSES FOR PREPARING ALUMINA AND MAGNESIUM CHLORIDE BY HC1 LEACHING OF VARIOUS MATERIALS

A process for preparing alumina, said process comprising leaching an aluminum-containing material with HC1 so as to obtain a leachate comprising aluminum ions, magnesium ions and a solid, and separating said solid from said leachate; substantially selectively precipitating MgC12 from said leachate and removing said MgC12 from said leachate; reacting said leachate with HC1 so as to obtain a liquid and a precipitate comprising said aluminum ions in the form of A1C13, and separating said precipitate from said liquid; heating said precipitate under conditions effective for converting A1C13 into A1203; and heating said MgC12 under conditions effective for converting it into MgO; and optionally recovering gaseous HC1 so-produced from heating.

Method of recovering metal values from nickel-containing ores

An improved method for processing of nickel-bearing ores, particularly saprolite and limonite, to recover the valuable minerals contained therein, comprising leaching the ore with nitric acid to form a slurry; separating the iron values by precipitation, removing the iron values; forming a liquid/solid residue in which nickel, cobalt and magnesium are in solution, and manganese and aluminum, when present, are solid residues in oxide form; conducting a liquid-solid separation and removing the solids; and recovering the nickel, cobalt, and manganese from the liquid-metal concentrate. The leachate is recovered and nitric acid from the leachate is recycled.

BATTERY RECYCLING BY HYDROGEN GAS INJECTION IN LEACH

The present disclosure relates to a process for the recovery of transition metals from batteries comprising treating a transition metal material with a leaching agent to yield a leach which contains dissolved salts of nickel and/or cobalt, injecting hydrogen gas in the leach at a temperature above 100° C. and a partial pressure above 5 bar to obtain a nickel and/or cobalt precipitate in elemental form, and separating the obtained nickel and/or cobalt precipitate. 116-. (canceled)17. A process for the recovery of transition metals from batteries comprising:treating a transition metal material with a leaching agent to yield a leach, wherein the leach comprises dissolved salts of nickel and/or cobalt,injecting hydrogen gas in the leach at a temperature above about 100° C. and a partial pressure above about 5 bar to obtain a nickel and/or cobalt precipitate in elemental form, andseparating the obtained nickel and/or cobalt precipitate.18. The process according to claim 17 , wherein the hydrogen gas is injected in the leach at a temperature ranging from 150° C. to 280° C.19. The process according to claim 17 , wherein the hydrogen gas is injected in the leach at a partial pressure ranging from 5 bar to 100 bar.20. The process according to claim 17 , wherein the hydrogen gas is injected in the leach at a pH-value above 4.21. The process according to claim 17 , wherein the leaching agent comprises an inorganic acid claim 17 , an organic acid claim 17 , a base claim 17 , or a chelating agent.22. The process according to claim 17 , wherein the transition metal material comprises about 1 wt % to about 30 wt % nickel.23. The process according to claim 17 , wherein claim 17 , at the treating step claim 17 , the leach comprises dissolved salts of nickel claim 17 , and claim 17 , at the injecting step claim 17 , elemental nickel is precipitated claim 17 , optionally in the presence of a nickel-reduction catalyst.24. The process according to claim 17 , whereinat the treating step, ...

DEZINCIFICATION PLANT, METHOD FOR OPERATING DEZINCIFICATION PLANT, AND HYDROMETALLURGICAL METHOD FOR NICKEL OXIDE ORE

The present invention provides a hydrometallurgical method for nickel oxide ore, wherein the plant can be smoothly started up without imposing a load onto a filter cloth for a separation treatment of zinc sulfide, and the amount of residual zinc in a mother liquor for nickel recovery can be reduced to 1 mg/L. In the plant start-up after the completion of a periodic inspection, a post-neutralization solution is controlled to return to a neutralization reaction tank via circulation piping by adjustment of a switching valve in flow piping without sulfurizing post-neutralization solution. When the flow rate and/or the temperature of the post-neutralization solution circulated reaches a predetermined value, a sulfurization treatment is applied to the post-neutralization solution in the dezincification reaction tank to form zinc-sulfide-containing mother liquor for nickel recovery and adjust the switching valve. Zinc-sulfide-containing mother liquor for nickel recovery is transferred to a filter apparatus via transfer piping. 1. A dezincification plant , being used in a hydrometallurgical method for nickel oxide ore , the dezincification step being such that a sulfurization treatment is applied to a post-neutralization solution obtained through a neutralization step of neutralizing a leachate of said nickel oxide ore thereby to form zinc sulfide , and said zinc sulfide is separated to obtain a mother liquor containing nickel and cobalt for nickel recovery , the dezincification plant comprising:a dezincification reaction tank configured to form zinc sulfide by applying a sulfurization treatment to the above-mentioned post-neutralization solution and form a mother liquor containing said zinc sulfide for nickel recovery;a filter apparatus configured to separate the above-mentioned zinc sulfide and the above-mentioned mother liquor for nickel recovery; anda storage tank configured to temporarily store the above-mentioned zinc-sulfide-containing mother liquor for nickel ...

METHOD FOR SELECTIVE PRECIPITATION OF IRON, ARSENIC AND ANTIMONY

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

Method for producing high-purity nickel sulfate

Provided is a method of producing high-purity nickel sulfate by an impurity-element removal method for selectively removing Mg from a Ni-containing solution. The method comprises a production process of producing nickel sulfate from a Ni-containing acid solution, the acid solution being treated in order of steps (1) to (3): (1) carbonation step, adding a carbonating agent into the Ni-containing solution to make Ni contained in the Ni-containing solution into a precipitate of nickel carbonate or a mixture of nickel carbonate and nickel hydroxide, thereby forming a slurry after carbonation including the precipitate and a solution after carbonation; (2) solid-liquid separation step, separating the slurry after carbonation formed in the carbonation step into the precipitate and the solution after carbonation; and (3) neutralization step, adding a neutralizing agent into the solution after carbonation separated through the solid-liquid separation step to recover Ni contained in the solution after carbonation as a Ni-precipitate.

AQUEOUS COBALT CHLORIDE SOLUTION PURIFICATION METHOD

The present invention provides an aqueous cobalt chloride solution purification method, in which impurities can be efficiently removed from a cobalt salt solution. 1. An aqueous cobalt chloride solution purification method for bringing metallic nickel into contact with an aqueous solution containing cobalt chloride to remove an impurity by a substitution reaction ,wherein a pH of the aqueous solution containing cobalt chloride is adjusted to not less than 1.5 and not more than 2.5.2. The aqueous cobalt chloride solution purification method according to claim 1 , wherein a temperature of the aqueous solution containing cobalt chloride is maintained at higher than 50° C. and not higher than 80° C.3. The aqueous cobalt chloride solution purification method according to claim 1 , wherein the impurity is copper.4. The aqueous cobalt chloride solution purification method according to claim 1 , wherein the aqueous solution containing cobalt chloride from which the impurity has been removed is used as a raw material of a positive electrode material containing in the composition of the positive electrode material nickel and cobalt in a nonaqueous electrolyte secondary battery.5. The aqueous cobalt chloride solution purification method according to claim 4 , wherein the aqueous solution containing cobalt chloride is a process liquid in a nickel smelting process claim 4 , andthe aqueous solution containing cobalt chloride from which the impurity has been removed is used in a liquid state as a raw material of the positive electrode material.6. The aqueous cobalt chloride solution purification method according to claim 2 , wherein a temperature of the aqueous solution containing cobalt chloride is maintained at not lower than 60° C. and not higher than 80° C. The present invention relates to an aqueous cobalt chloride solution purification method.Cobalt is a rare metal and is a valuable metal used as a material of an alloy. Cobalt is also used as an electrode material for ...

HYDROMETALLURGICAL PROCESS TO PRODUCE PURE MAGNESIUM METAL AND VARIOUS BY-PRODUCTS

The present description relates to a process for producing magnesium metal from magnesium-bearing ores using serpentine. The process described herein consists generally in a mineral preparation and classification followed by leaching with dilute hydrochloric acid. The slurry is filtered and the non-leached portion, containing amorphous silica is recovered. The residual solution is neutralized and purified by chemical precipitation with non activated and activated serpentine. The nickel is also recovered by precipitation at higher pH. A final neutralisation and purification step of magnesium chloride solution by precipitation allows eliminating any traces of residual impurities. The purified magnesium chloride solution is evaporated until saturation and the MgCl.6HO is recovered by crystallization in an acid media. The salt is dehydrated and subsequent electrolysis of anhydrous magnesium chloride produces pure magnesium metal and hydrochloric acid. 1. A process for producing magnesium metal from magnesium-bearing ores , comprising the steps of:(a) leaching the magnesium-bearing ores with HCl obtaining a slurry comprising magnesium chloride;(b) filtrating the slurry to obtain a magnesium chloride solution and a silica by-product;(c) purifying the magnesium chloride solution by increasing the pH adding a neutralizing agent and an oxidyzing agent;(d) separating iron residues from the magnesium solution chloride solution;(e) recuperating nickel contained in the magnesium chloride solution by increasing a second time the pH by adding a base and recovering a nickel rich fraction by filtration;(f) adding an oxidizing agent and increasing the pH a third time of the magnesium chloride solution by adding a base and precipitating residual metallic impurities;(g) adding a neutral salt to said magnesium chloride solution precipitating sulfate ions from said magnesium chloride solution and separating metal impurities and sulfates from said magnesium chloride solution producing a ...

METHOD FOR RECYCLING VALUABLE METALS FROM SPENT BATTERIES

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

Processes for recovering non-ferrous metals from solid matrices

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

Method for producing high-purity nickel surface

Provided is a production method for obtaining high purity nickel sulfate having low levels of impurities, particularly low levels of magnesium and chloride, by adjusting the concentration of an extractant and the pH concentration at the time of treatment in a process of obtaining a nickel sulfate solution having a high nickel concentration by solvent extraction using an acidic organic extractant.

Nickel recovery process

A nickel recovery process capable of decreasing nickel remaining in a byproduct by recovering nickel from the byproduct of electrolytic nickel manufacturing process by chlorine-leaching, and also, capable of simplifying a cementation step simultaneously, is provided. In a nickel recovery step S 60 , a nickel recovery step S 70 and a nickel recovery step S 80 , nickel is recovered in each step from S 0 slurry, residue flaker and chlorine-leached residue, which are byproducts of electrolytic nickel manufacturing process by chlorine-leaching, by using an aqueous solution containing 80 g/L to 390 g/L of chlorine and 30 g/L to 70 g/L of copper.

PROCESSES FOR TREATING MAGNESIUM-CONTAINING MATERIALS

The disclosed processes can be effective for treating various materials comprising several different metals. These materials can be leached with HCl for obtaining a leachate and a solid. Then, they can be separated from one another and a first metal can be isolated from the leachate. Then, a second metal can further be isolated from the leachate. The first and second metals can each be substantially selectively isolated from the leachate. This can be done by controlling the temperature of the leachate, adjusting pH, further reacting the leachate with HCl, etc. The metals that can be recovered in the form of metal chlorides can eventually be converted into the corresponding metal oxides, thereby allowing for recovering HCl. The various metals can be chosen from aluminum, iron, zinc, copper, gold, silver, molybdenum, cobalt, magnesium, lithium, manganese, nickel, palladium, platinum, thorium, phosphorus, uranium, titanium, rare earth element and rare metals. 1. A process for treating a magnesium-containing material , said process comprising:leaching the magnesium-containing material with HCl so as to obtain a leachate comprising magnesium ions and ions from at least one metal and a solid, and separating said solid from said leachate; andprecipitating said at least one metal by reacting said leachate with a precipitating agent so as to obtain a liquid comprising said magnesium ions and a precipitate comprising said precipitated at least one metal, and separating said precipitate from said liquid.2. The process of claim 1 , wherein said process comprises substantially selectively precipitating said magnesium ions by reacting said liquid with said precipitating agent.3. The process of claim 1 , wherein said precipitating agent is a base.4. The process of claim 2 , wherein said precipitating agent is Mg(OH).5. The process of claim 1 , wherein said magnesium-containing material is serpentine.6. The process of claim 1 , wherein said magnesium-containing material is asbestos ...

Recycling method of copper-nickel-containing cutting fluid

一种含铜镍切削液的循环利用方法，涉及一种切削液的循环利用方法。本发明是要解决现有的切削液的处理工艺复杂、处理成本高的技术问题。本发明通过化学药剂硫化物和有机硫化物高分子鏊合剂使切削液中的铜离子、镍离子形成沉淀，使切削液的浑浊程度下降，实现切削液中铜离子、镍离子和金属碎屑的去除，通过膜过滤实现沉淀与切削液的分离；药剂产生的金属沉淀物含水率低，金属含量高，回收利用其中的金属物质；膜过滤后切削液能变澄清透明，切削液回收率高，平均回收率为96％，对切削液性质影响小，具有重复使用性，减少了切削液的排放量和使用量，降低了成本。本发明应用于回收切削液。

Method of recovering cobalt from byproduct generated in smelting of zinc

본 발명은 아연 제련 공정 중 코발트를 회수하는 방법에 관한 것으로, 아연정광을 배소공정, 용액공정 및 정액공정 처리하여 코발트, 아연 및 탈륨을 포함하는 케이크를 얻는 단계; 상기 케이크를 침출하고 고액분리하여 고상의 코발트 케이크를 얻는 단계, 상기 코발트 케이크는 코발트, 철, 망간 및 탈륨을 포함한다; 상기 코발트 케이크에 코발트를 침출하는 침출용매를 가하여 공정침출액을 얻는 단계와; 상기 공정침출액에 전해이산화망간 파티클을 혼합한 혼합액을 얻고 상기 혼합액을 고액분리하여 제1공정여액과 탈륨이 흡착된 고상의 상기 전해이산화망간 파티클을 얻는 단계와; 상기 제1공정여액에 제1산화제를 가하여 철과 망간을 제거하여 제2공정여액을 얻는 단계와; 상기 제2공정여액에 제2산화제를 가하여 고상의 코발트를 얻는 단계를 포함한다. The present invention relates to a method for recovering cobalt during the zinc smelting process, the method comprising: obtaining a cake containing cobalt, zinc and thallium by subjecting zinc concentrate to a roasting process, a solution process, and a semen process; Leaching and solidifying the cake to obtain a solid cobalt cake, the cobalt cake comprising cobalt, iron, manganese and thallium; Adding a leaching solvent for leaching cobalt to the cobalt cake to obtain a process leaching solution; Obtaining a mixed solution of electrolytic manganese dioxide particles mixed with the process leaching solution and solid-liquid separation of the mixed solution to obtain the solid electrolytic manganese dioxide particles adsorbed with a first process filtrate and thallium; Adding a first oxidant to the first process filtrate to remove iron and manganese to obtain a second process filtrate; Adding a second oxidant to the second process filtrate to obtain a solid cobalt.

Method for preparing battery-grade cobalt sulfate by using organic cobalt slag of zinc smelting plant

本发明公开了一种利用锌冶炼厂有机钴渣制备电池级硫酸钴的方法，属于有色金属湿法冶金技术领域。该方法包括：有机钴渣经稀硫酸洗涤得洗涤液与洗涤渣，洗涤液用以回收镉粉及碳酸锌，洗涤渣通过低温焙烧得初制氧化钴原料，焙烧过程中产生的酸性气体进行吸收处理；初制氧化钴原料用硫酸加还原剂浸出得含硫酸钴的溶液，经P204萃取深度除杂后用P507萃取钴，富集得到高纯度硫酸钴溶液，经蒸发浓缩结晶得到电池级硫酸钴晶体产品。本发明能够将有机钴渣净化除杂，产出纯净的电池级硫酸钴晶体，使有机钴渣中有价金属得以充分回收利用，达到变废为宝的目的，为有色金属湿法冶金领域提供了一种新的钴原料来源，且工艺流程绿色环保，具有极高的经济及社会价值。

Method for producing pure magnesium metal and various by-products

A kind of preparation method of iron oxide product

本发明涉及有色冶炼湿法、火法冶金技术领域，公开了一种氧化铁的制备方法，是将黄钠铁矾渣用工业硫酸进行浸出处理，浸出液再经P 507 萃取除杂，萃余液满足生产硫酸镍产品的质量要求，反萃液杂质含量能够满足生产氧化铁产品的质量要求，反萃液经氧化中和水解法和针铁矿法沉铁，铁沉淀物再经高温煅烧产出合格的氧化铁产品，本发明以黄钠铁矾渣为原料制备氧化铁，使黄钠铁矾渣循环利用，找到了一种生产氧化铁的原料，使黄钠铁矾渣得以循环利用，并拓宽了生产氧化铁产品的原料种类。

Method for preparing high grade ferronickel and high purity nickel from low grade nickel ore

The present invention relates to a method to manufacture high grade ferronickel and high purity nickel from low grade nickel ore by acid leaching. According to the present invention, the method comprises: a reduction step of reducing a material containing nickel and iron with a reduction gas including hydrogen to manufacture a reduction material for leaching; a slurry step of inserting a slurry making solution into the reduction material for leaching to manufacture slurry; a leaching step of inserting acid of twice to four times of mole numbers with respect to a mole number of (Fe+Ni) among the material containing nickel and iron into the slurry so as to leach iron and nickel as an ion, thereby acquiring a leaching solution; and a precipitation step of separating the leaching solution to use a part of the leaching solution as the slurry making solution and use the remainder as a leaching solution for precipitation, and feeding a seed material for precipitation containing iron to the leaching solution for precipitation to replace an iron component of the seed material for precipitation into the nickel of the leaching solution to precipitate the nickel on the seed material for precipitation.

Method and apparatus for controlling metal separation

本发明涉及一种在制锌过程中控制连续金属去除的方法和装置，其中金属去除是在一个或多个反应器(11a-c)中进行的，与反应器相连地，测量氧化还原电势(16a-c)及酸度和/或碱度，并根据测量结果，朝所需方向调节金属去除的工艺变量(17a-c)。按照本发明，在反应器外部与反应器出口管相连，根据反应器中产生的淤浆进行氧化还原电势的测量(16a-c)，并以预定间隔净化测量仪器(16a-c)。

For the method reclaiming non-ferrous metal from solid matrix

本发明涉及用于从固体基质中回收有色金属的方法，包括如下阶段：(a)在氧存在下，在温度100℃‑160℃和压力150kPa‑800kPa下，用含氯离子和铵离子、pH为6.5‑8.5的含水基溶液沥滤固体基质，以获得包含沥滤金属的提取溶液和固体沥滤残余物；(b)将所述固体沥滤残余物与所述提取溶液分离；(c)使所述提取溶液经历至少一次置换沉淀以回收元素态的金属。

Method for precipitating nickel and cobalt in laterite-nickel ore hydrometallurgy

本发明提供了一种红土镍矿湿法冶炼中沉淀镍钴的方法。该方法包括：步骤一，将红土镍矿进行酸浸，得到含镍钴酸浸液，且含镍钴酸浸液中含有镁离子；步骤二，将含镍钴酸浸液进行沉淀反应，且在沉淀反应过程中持续添加新鲜的含镍钴酸浸液和沉淀剂，得到镍钴沉淀液；步骤三，将镍钴沉淀液进行浓密分离，得到沉镍钴底流；并将沉镍钴底流分为第一部分和第二部分；步骤四，将第一部分沉镍钴底流与石灰乳混合形成混合矿浆，并将混合矿浆返回至步骤二中作为至少部分沉淀剂；将第二部分沉镍钴底流进行钙镍分离，得到氢氧化镍钴。上述方法中，氢氧化镍钴的沉淀性能更佳，有利于提高浓密分离速度、提高浓密底流固含量，同时降低氢氧化镍钴产品的含水率。

PROCESS FOR THE PRODUCTION OF METALLIC MAGNESIUM FROM ORES CONTAINING MAGNESIUM

a presente invenção diz respeito a um processo para a produção de magnésio metálico a partir de minérios que contêm magnésio utilizando serpentina. de um modo geral, o processo aqui descrito consiste numa preparação e classificação do minério seguida por lixiviação com ácido clorídrico diluído. a lama é filtrada e a porção não lixiviada, que contém sílica amorfa, é recuperada. a solução residual é neutralizada e purificada por precipitação química com serpentina não ativada e ativada. o níquel também é recuperado por precipitação a um ph mais elevado. um passo final de neutralização e purificação da solução de cloreto de magnésio por precipitação permite a eliminação de quaisquer vestígios de impurezas residuais. a solução de cloreto de magnésio purificada é evaporada até à saturação e o mgcl2.6h2o é recuperado por cristalização em meio ácido. o sal é desidratado e a subsequente eletrólise do cloreto de magnésio anidro produz magnésio metálico puro e ácido clorídrico. the present invention relates to a process for the production of metallic magnesium from ores containing magnesium using serpentine. in general, the process described here consists of a preparation and classification of the ore followed by leaching with dilute hydrochloric acid. the sludge is filtered and the non-leached portion, which contains amorphous silica, is recovered. the residual solution is neutralized and purified by chemical precipitation with a non-activated and activated coil. nickel is also recovered by precipitation at a higher ph. a final step of neutralization and purification of the magnesium chloride solution by precipitation allows the removal of any traces of residual impurities. the purified magnesium chloride solution is evaporated to saturation and the mgcl2.6h2o is recovered by crystallization in an acid medium. the salt is dehydrated and the subsequent electrolysis of the anhydrous magnesium chloride produces pure metallic magnesium and hydrochloric acid.

Metal separation control method and apparatus

본 발명은 금속 제거가 하나 이상의 반응기(11a 내지 11c)에서 수행되고, 상기 반응기에 있어서 산화 환원 전위와 산도 및/또는 염기도가 측정 기구(16a 내지 16c)에서 측정되며, 상기 측정 결과에 기초하여 상기 금속 제거의 공정 변수들이 원하는 방향으로 조절되는, 아연 제조 공정과 관련한 연속적인 금속 제거를 제어하는 방법 및 장치에 관한 것이다. 본 발명에 따르면, 상기 산화 환원 전위는 상기 반응기 외부에서 상기 반응기의 배출 파이프와 연결되어 상기 반응기에서 생성된 슬러지로부터 측정 기구(16a 내지 16c)에서 측정되고, 상기 측정 기구(16a 내지 16c)는 예정된 간격마다 세정된다. In the present invention, metal removal is carried out in one or more reactors (11a to 11c), in which the redox potential and acidity and / or basicity are measured in measuring instruments (16a to 16c) and based on the measurement results, A method and apparatus for controlling continuous metal removal in connection with a zinc manufacturing process, in which process parameters of metal removal are adjusted in a desired direction. According to the invention, the redox potential is measured in the measuring instruments 16a to 16c from the sludge produced in the reactor connected to the discharge pipe of the reactor outside the reactor, and the measuring instruments 16a to 16c are It is cleaned every interval. 아연 제조, 금속 제거, 반응기, 산화환원전위, 산도, 염기도, 공정변수 Zinc production, metal removal, reactor, redox potential, acidity, basicity, process variables

A kind of method of the low nickel matte chlorination refining of high ferro

本发明公开了一种高铁低镍锍氯化精炼的方法，该方法包括以下步骤：氯气浸出‑一段热压除铜‑二段常压沉铜‑萃取除铁‑中和深度除铁‑萃取钴‑除硫酸根，其采用氯气浸出高铁低镍锍，再分离铜、铁、钴及其它杂质，最后得到纯净的氯化镍溶液，在氯化体系下实现了镍铜铁钴的高效低成本富集分离，铁以产品形式开路；贵金属富集在浸出渣中，可进一步回收贵金属；铜富集后转火法铜冶炼系统；钴富集后转钴系统；镍为纯净的氯化镍溶液，可用于生产电积镍或氯化镍产品。本发明整个工艺过程易操作，运行成本低，减少了有价金属的损失，镍、钴及贵金属等直收率高，有价金属直收率大于95%，钴直收率较传统火法流程提高20%左右，废水废渣量极少，节能环保。

A method of cobalt product is prepared by cobalt ammonia complex

本发明公开了一种由钴氨络合物制备钴产品的方法，先将待处理的钴氨络合物溶液加热，然后加入还原剂，加入完毕后保温反应。搅拌下向预处理后的钴氨络合物溶液中滴加氢氧化钠溶液或草酸盐溶液，滴加完毕后开始反应。反应结束后的物料抽滤，抽滤得到的沉淀洗涤干燥后得到氢氧化钴或草酸钴，完成钴的回收。本发明工艺安全简单，先对钴氨络合物还原，将三价钴还原为二价钴，然后向二价的钴氨络合物中加入氢氧化钠或草酸钠或草酸铵，得到钴沉淀物。还原剂的加入可以破坏三价钴氨络合物的稳定性，还原后的钴氨络合物更容易和氢氧化钠或草酸根反应，从而提高钴的回收效率和回收率，制得的钴产品纯度高。

Recovering cobalt from a raffinate from the solvent extraction of nickel includes adding a sulfide to precipitate cobalt and zinc sulfides

Recovering cobalt from a raffinate from the solvent extraction of nickel comprises adding a sulfide to precipitate cobalt and zinc sulfides, removing ammonia from the sulfurized paste, digesting the cobalt sulfide with acid, removing zinc by extraction with a di(2-ethylhexyl) phosphate solution, removing nickel by ion exchange, adding sodium carbonate to precipitate cobalt carbonate, digesting the cobalt carbonate with acid, electrodepositing cobalt from the digest and allowing the cobalt to sediment on stainless steel plates to form cobalt electrodes.

Patent FR2208989B1

Oxygen pressure leaching zinc smelting purification impurity removal process

本发明公开了一种新型氧压浸出锌冶炼净化除杂工艺，先将电解废液加入至除铁后液中调溶液pH，再加入二段净化渣，控制反应条件产出一段净化渣和一段净化液。在一段净化液中加入电解废液和锌粉产出二段净化液和二段净化渣，将二段净化渣返回至除铁后液中作为净化剂，二段净化液进入三段净化槽进行除去残镉。该工艺将二段净化渣返回一段净化作为一段净化作业的净化剂，可以减少锌粉单耗和净化产生的渣量，降低生产成本，并方便下游工序综合处理，新工艺具有锌粉加入量低、净化除杂彻底等优点。

Method for recovering covalt from solution comprising covalt, nickel and iron

본 발명은 광석으로부터 니켈을 회수하는 공정 중에 잔존하는 여액으로부터 코발트를 고순도로 회수하는 방법에 관한 것으로서, 저품위 니켈광석으로부터 니켈을 회수하는 과정에서 발생하는 석출여액을 양이온교환 수지에 적용하여 코발트 및 니켈을 포함하는 용액을 수득하는 양이온교환 단계, 상기 코발트 및 니켈을 포함하는 용액으로부터 철을 제거하여 탈철 용액을 얻는 탈철단계, 상기 탈철 용액에 양이온 추출제를 첨가하여 코발트가 포함된 추출용액을 수득하고, 상기 추출용액으로부터 탈거액에 의해 코발트를 탈거하여 수상의 코발트 용액을 얻는 용매추출 및 탈거 단계 및 상기 코발트가 포함된 용액을 농축 및 결정화하는 농축 결정화 단계를 포함하는, 저품위 니켈광석으로부터 니켈을 회수하는 과정에서 발생하는 석출여액으로부터 코발트를 회수하는 방법을 제공한다. The present invention relates to a method for recovering cobalt from the filtrate remaining in the process of recovering nickel from the ore with high purity, wherein the precipitated filtrate generated in the process of recovering nickel from low-grade nickel ore is applied to the cation exchange resin to cobalt and nickel A cation exchange step of obtaining a solution comprising a, a decarburization step of removing iron from the solution containing the cobalt and nickel to obtain a iron removal solution, by adding a cation extractant to the iron removal solution to obtain an extract solution containing cobalt and Recovering nickel from low-grade nickel ores, including solvent extraction and stripping to obtain a cobalt solution in the aqueous phase by removing cobalt from the extraction solution, and a concentrated crystallization step of concentrating and crystallizing the solution containing the cobalt. From the precipitated filtrate that occurs during the process It provides a method for recovering a bit.

Process of refining nickel bearing materials

Method and apparatus for controlling metal separation

A kind of method for recycling nickel from nickeliferous calcium and magnesium slag with ion exchanged soln

本发明公开了一种用离子交换溶液从含镍的钙镁渣中回收镍的方法，该方法主要包括离子交换溶液制备，离子交换反应，过滤、洗涤，提高滤液中镍的浓度，滤液检测，镍的置换回收等步骤。本发明的优点在于，该方法提供的原料便宜，过程工艺简单，反应温和，操作简便，易于实现规模化生产，而且回收过程无环境污染，符合国家的环保政策，氯化镍回收液多次重复利用后可以作为生产镍铁产品的原料，或经Na 2 S回收处理生成NiS直接进入火法系统，离子交换后的钙镁渣在洗涤后基本不含镍，达到了弃渣的要求，降低了生产成本，提高资源的综合利用水平，本方法与现有的硫酸镍生产工艺完美的结合，对现有生产不造成影响，流程简单，生产成本低，环保效果好。

Method and apparatus for controlling metal separation

The invention relates to a method and apparatus for controlling a continuous metal removal in conjunction with a zinc preparation process, in which the metal removal is performed in one or more reactors (11a-c), in conjunction with the reactor, the redox potential (16a-c) and the acidity and/or basicity are measured, and based on the measurement results, the process variables (17a-c) of the metal removal are adjusted towards the desired direction. According to the invention, the redox potential measurements (16a-c) are performed from the sludge produced in the reactor in conjunction with the outlet pipe of the reactor outside the reactor, and the measuring instrument (16a-c) is purified at predetermined intervals.

Manufacturing method of high purity nickel sulfate

酸性有機抽出剤を用いた溶媒抽出により高ニッケル濃度の硫酸ニッケル溶液を得る工程において、抽出剤の濃度と処理時のｐＨ濃度を調整する事で、不純物、特にマグネシウムや塩化物品位が低く、高純度な硫酸ニッケルを得る製造方法の提供を目的とする。ニッケルを含有する酸性溶液を、ニッケルを含有する酸性溶液に硫化剤を添加し、ニッケル硫化物の沈澱と硫化後液とを得る硫化工程、硫化工程で得たニッケル硫化物のスラリーを作製し、前記スラリーに酸化剤を添加して、ニッケル濃縮液を得る再溶解工程、再溶解工程で得たニッケル濃縮液に、中和剤の添加による中和を施して生成する中和澱物と脱鉄後ニッケル濃縮液を得る浄液工程、浄液工程で得た脱鉄後ニッケル濃縮液を溶媒抽出し、逆抽液と硫酸ニッケル溶液とを得る溶媒抽出工程の各工程を少なくとも経て処理することを特徴とする高純度硫酸ニッケルの製造方法。 In the process of obtaining a nickel sulfate solution with a high nickel concentration by solvent extraction using an acidic organic extractant, by adjusting the concentration of the extractant and the pH concentration during the treatment, impurities, especially magnesium and chlorinated articles are low, and high An object is to provide a production method for obtaining pure nickel sulfate. Add a sulfurizing agent to an acidic solution containing nickel, add a sulfiding agent to the acidic solution containing nickel, and prepare a nickel sulfide slurry obtained in the sulfidation step, which obtains nickel sulfide precipitate and sulfidized solution, Neutralized starch and deiron produced by adding an oxidizing agent to the slurry to obtain a nickel concentrate, and neutralizing the nickel concentrate obtained in the redissolution step by adding a neutralizer. The post-deironation nickel concentrate obtained in the liquid purification step after obtaining the nickel concentrate is subjected to solvent extraction and processed through at least each step of the solvent extraction step to obtain a reverse extraction solution and a nickel sulfate solution. A method for producing high-purity nickel sulfate.

Method and apparatus for controlling metal removal

Improved process and plant for producing nickel

A method for recovering nickel, a nickel compound or a mixed nickel and cobalt compound comprising: (a) providing a nickel-containing leach solution in which nickel is dissolved in a solvent; (b) subjecting the leach solution to nano-filtration or reverse osmosis to recover solvent therefrom and to form a nickel-containing solution having greater nickel concentration than the leach solution; (c) removing specific metal ions, such as copper and/or trivalent iron, that adversely impact subsequent nickel and cobalt recovery; and (d) treating the nickel-containing solution from step (c) above to recover nickel or a nickel compound.

Method and apparatus for controlling metal separation

The invention relates to a method and apparatus for controlling a continuous metal removal in conjunction with a zinc preparation process, in which the metal removal is performed in one or more reactors (11a-c), in conjunction with the reactor, the redox potential (16a-c) and the acidity and/or basicity are measured, and based on the measurement results, the process variables (17a-c) of the metal removal are adjusted towards the desired direction. According to the invention, the redox potential measurements (16a-c) are performed from the sludge produced in the reactor in conjunction with the outlet pipe of the reactor outside the reactor, and the measuring instrument (16a-c) is purified at predetermined intervals.

Process for preparing finely divided metal powders

The invention relates to a process for preparing finely divided metal powders, which process is characterized in that metal salts are reacted with magnesium, to which a catalytic amount of anthracene and/or magnesium anthracene or of one of their derivatives has been added as an activator, in a solvent, and optionally in the presence of an inorganic support material.

Recycling method of electrode active material of metal oxide, electrode active material of metal oxide for lithium secondary battery, electrode for lithium secondary battery, and lithium secondary battery fabricated thereby

본 발명은 리튬 이차전지 금속산화물 전극활물질의 재활용 방법에 관한 것이다. 본 발명은 리튬 이차전지의 제조 공정 중 발생하는 금속산화물 전극활물질을 함유하는 전극 스크랩을 마련하는 제1 단계; 상기 전극 스크랩을 공기 분위기 또는 공기 및 질소 혼합 가스 분위기에서 열처리하여 상기 전극 스크랩 내에 존재하는 결착재를 탄화시키는 제2 단계; 및 상기 전극 스크랩으로부터 금속산화물 전극활물질을 회수하는 제3 단계;를 포함하는 것을 특징으로 한다. 본 발명에 의하면 간단한 물리적인 열처리 및 분리 방법에 의해 환경오염을 최소화하고, 단순한 공정과 저렴한 비용으로 전극 및 전지 제조 공정 중 발생하는 전극 스크랩 혹은 전지 내에 포함되어 있는 금속산화물 전극활물질을 재활용할 수 있다. The present invention relates to a method for recycling a lithium secondary battery metal oxide electrode active material. The present invention provides a first step of preparing an electrode scrap containing a metal oxide electrode active material generated during the manufacturing process of a lithium secondary battery; Heat treating the electrode scrap in an air atmosphere or an air and nitrogen mixed gas atmosphere to carbonize a binder present in the electrode scrap; And recovering a metal oxide electrode active material from the electrode scrap. According to the present invention, it is possible to minimize environmental pollution by a simple physical heat treatment and separation method, and to recycle the metal scrap electrode active material contained in the electrode or the scrap generated during the electrode and battery manufacturing process at a simple process and low cost. .

Aqueous cobalt chloride solution refinement method

Disclosed is an aqueous cobalt chloride solution refinement method for bringing metallic nickel into contact with an aqueous solution containing cobalt chloride to remove an impurity by a cementation reaction, in which the metallic nickel is washed with an acidic liquid having a pH of not more than 2.5 before the metallic nickel is brought into contact with the aqueous solution containing cobalt chloride. Since the metallic nickel is washed with the acidic liquid having a pH of not more than 2.5, a passive film on a surface of the metallic nickel is removed. The passive film is removed from the metallic nickel, and therefore, when the metallic nickel comes in contact with the aqueous solution containing cobalt chloride, an impurity more noble than the metallic nickel can be precipitated by the cementation reaction.

Method for recovering zinc and cobalt in zinc hydrometallurgy purification slag

本发明公开了一种湿法炼锌净化渣中锌钴的回收方法。该工艺首先将湿法炼锌净化一段产生的铜镉渣中的铜镉除去之后得到的贫镉钴液置于贫镉沉钴槽，然后将二段净化渣钴镍渣进行浆化，浆化后的浆化液与贫镉沉钴槽中的贫镉钴液混合，在活性剂的存在下，通过一定的反应时间及反应温度，通过钴镍渣中含有的锌粉实现对贫镉沉钴液中的钴进行沉降；该方法将钴镍渣的锌粉进行再利用、同时实现了对贫镉沉钴液中钴进行充分的沉降，大大减少了锌粉的消耗量，降低了生产成本。该工艺简单、合理，易操作，很好的实现了废渣的循环利用，具有很好的应用前景。

Aqueous cobalt chloride solution refinement method

An aqueous cobalt chloride solution refinement method, in which metallic nickel is washed with an acidic liquid having a pH of not more than 2.5 before the metallic nickel is brought into contact with the aqueous solution containing cobalt chloride. Since the metallic nickel is washed with the acidic liquid having a pH of not more than 2.5, a passive film on a surface of the metallic nickel is removed and therefore, when the metallic nickel comes in contact with the aqueous solution containing cobalt chloride, an impurity more noble than the metallic nickel can be precipitated by a cementation reaction. In addition, since the metallic nickel is only washed with acid to be brought into contact with the aqueous solution containing cobalt chloride, impurities can be easily removed from the aqueous solution containing cobalt chloride.

Hydrometallurgical process to produce pure magnesium metal and various by-products

Method for removing impurities from waste battery leachate

本发明涉及一种废旧电池浸出液除杂的方法：加入铁粉，搅拌后过滤，得到除铜后液；加入氧化剂，得到除亚铁后液；取少量除亚铁后液稀释作为底液，加入除亚铁后液和pH调节剂，除亚铁后液加完后，继续加入pH调节剂，搅拌后过滤，得到除铁铝后液和铁铝渣；将氟化物加入所得除铁铝后液，搅拌后过滤，得到除钙镁后液；加入所得铁铝渣，搅拌后过滤，得到除氟硅后液和除氟硅后铁铝渣；将锰粉加入所得除氟硅后液，搅拌后过滤，得到净化液。本发明方法使用铁粉置换除铜，成本低；针铁矿法除铁铝，渣过滤性能良好；铁铝渣除氟硅，废渣得到有效利用，同时减少了铁铝渣酸洗工序；锰粉深度除铜，环保且操作简单。

Method for recovering cobalt from hexammine cobaltic (111) solutions

A method is disclosed for recovering cobalt, which comprises adding ammonia to a cobalt chloride solution to a pH of from about 8.8 to about 9.6 with oxidation, to form hexammine cobalt (III) chloride, adding to the resulting solution of hexammine cobalt (III) chloride, sodium chloride in an amount sufficient to result in the precipitation of at least about 98% by weight of the cobalt as cobalt hexammine (III) chloride at a temperature of no greater than about 40° C., separating the precipitate of cobalt hexammine (III) chloride from the resulting mother liquor which contains the balance of the cobalt, adding to the mother liquor, aluminum powder in an amount sufficient to result in the precipitation of the balance of the cobalt as cobalt metal, and separating the cobalt metal from the resulting spent liquor.

PROCESS FOR RECOVERY OF METALLIC VALUES FROM LATERITE ORE CONTAINING MAGNESIUM, NICKEL AND COBALT, PROCESS TO INCREASE THE RECOVERY OF NICKEL AND COBALT OF LATERITE CONTAINING NICKEL, COBALT AND MAGNESIUM, AND THE PROCESS OF RECOVERY AND ELECTRIC PROCESS LATERITA MINING

Ferro-Nickel recovery method by recycling the leached and washed solution

본 발명은 니켈 및 철을 함유하는 니켈광석으로부터 니켈을 회수함에 있어서, 니켈광석을 산침출하여 니켈이온 함유 용액을 제조하는 과정에서 발생하는 잔사 슬러지의 수세액을 재활용하여 페로니켈 형태로 회수하는 방법에 관한 것으로서, 니켈 철 함유 원료 분말을 수소를 포함하는 환원 가스로 환원하여 침출용 환원 원료를 얻고, 상기 침출용 환원 원료를 불활성 분위기에서 물을 사용하여 슬러리화하여 침출용 환원 원료 슬러리를 제조하는 단계; 상기 침출용 환원 원료 슬러리에 황산 또는 염산의 산을 투입하여 니켈 및 철을 이온으로 용해 침출한 후, 니켈 철 이온 함유 용액을 잔사 슬러지로부터 분리하는 단계; 상기 니켈 철 이온 함유 용액에 니켈 및 철 함유 원료를 수소를 함유하는 가스로 환원하여 얻어진 석출용 환원 원료를 침출용 환원 원료와 석출용 환원 원료의 전체 중량에 대하여 10 내지 40중량%의 함량으로 포함하는 석출용 환원원료 슬러리를 상기 니켈 철 이온 함유 용액에 투입하여 상기 석출용 환원 원료의 철이 니켈 철 이온 함유 용액 내의 니켈로 치환되어 페로니켈이 석출되는 단계를 포함하며, 상기 잔사 슬러지를 물로 수세하여 잔사 슬러지 중의 니켈 이온을 포함하는 수세액을 얻고, 상기 수세액을 상기 침출용 환원원료를 슬러리화하는 물로 사용하는 페로니켈 회수 방법을 제공한다. The present invention relates to a method for recovering nickel from a nickel ore containing nickel and iron by recycling the recovered wastewater from the residue sludge generated during the acid leaching of nickel ore to nickel ion containing solution , Which comprises reducing nickel iron-containing raw material powder with a reducing gas containing hydrogen to obtain a raw material for leaching, and slurrying the raw material for leaching by using water in an inert atmosphere to prepare a raw material slurry for leaching step; Adding an acid of sulfuric acid or hydrochloric acid to the slurry for reducing leaching for leaching, dissolving and leaching nickel and iron with ions, and then separating the nickel iron ion-containing solution from the residue sludge; The precipitation reduction raw material obtained by reducing the nickel and iron containing raw material with the hydrogen-containing gas into the nickel iron ion-containing solution is contained in an amount of 10 to 40% by weight based on the total weight of the raw materials for leaching and the precipitation reducing raw material Wherein the precipitate reducing raw material slurry is introduced into the nickel iron ion-containing solution so that the iron of the precipitation reducing raw material is replaced with nickel in the nickel iron ion- ...

PROCEDURE TO RECOVER NON-FERROUS METALS FROM A SOLID MATRIX

SE REFIERE A UN PROCEDIMIENTO PARA RECUPERAR METALES NO FERROSOS DE UNA MATRIZ SOLIDA QUE COMPRENDE: A) LIXIVIAR LA MATRIZ SOLIDA CON UNA SOLUCION DE BASE ACUOSA QUE CONTIENE IONES DE CLORURO E IONES DE AMONIO Y QUE TIENE UN PH ENTRE 6.5 Y 8.5, EN PRESENCIA DE OXIGENO, A UNA TEMPERATURA ENTRE 100�C Y 160�C Y UNA PRESION ENTRE 150 kPa Y 800 kPa, A FIN DE OBTENER UNA SOLUCION DE EXTRACCION QUE COMPRENDE METALES LIXIVIADOS Y UN RESIDUO DE LIXIVIACION SOLIDO; B) SEPARAR DICHO RESIDUO DE LIXIVIACION SOLIDO DE DICHA SOLUCION DE EXTRACCION; C) SOMETER DICHA SOLUCION DE EXTRACCION A UNA CEMENTACION A FIN DE RECUPERAR LOS METALES EN ESTADO ELEMENTAL REFERS TO A PROCEDURE TO RECOVER NON-FERROUS METALS FROM A SOLID MATRIX THAT INCLUDES: A) LEACHING THE SOLID MATRIX WITH A WATER-BASED SOLUTION THAT CONTAINS CHLORIDE IONS AND AMMONIUM IONS AND THAT HAS A PH BETWEEN 6.5 AND 8.5, IN PRESENCE OF OXYGEN, AT A TEMPERATURE BETWEEN 100�C AND 160�C AND A PRESSURE BETWEEN 150 kPa AND 800 kPa, IN ORDER TO OBTAIN AN EXTRACTION SOLUTION THAT INCLUDES LEAKED METALS AND A SOLID LEACHING RESIDUE; B) SEPARATE SAID SOLID LEACHING RESIDUE FROM SAID EXTRACTION SOLUTION; C) SUBMIT SAID EXTRACTION SOLUTION TO A CEMENTATION IN ORDER TO RECOVER THE METALS IN THE ELEMENTARY STATE

Method of separating cobalt from nickel

Method for purifying crude cobalt hydroxide by cobalt precipitation through displacement method

本发明提供了一种置换法沉钴提纯粗制氢氧化钴方法，属于有色金属湿法冶炼的技术领域。该方法在沉钴料液除铁锰等杂质离子之后，分两段进行沉钴，一段沉钴渣作为产品，二段沉钴渣作为一段沉钴的添加剂；在一段沉钴前，沉钴液杂质离子主要剩下锰和锌离子，基于传统一段沉钴法为提高钴的直收率，加入过量的氧化镁使终点pH达到8.0～8.5，目的在于使锰、锌等离子大量沉淀到一段沉钴渣中，但易造成杂质的含量及氧化镁的消耗升高的弊端,本发明具有降低粗制氢氧化钴中杂质含量以提升粗制氢氧化钴中钴含量和减少活性氧化镁的消耗以减低生产成本的优点。

Method for removing copper from lithium ion cell scrap, and method for recovering metal

This method for removing copper from lithium ion battery scrap is a method for removing copper from lithium ion cell scrap that contains copper, wherein the method comprises: a leaching step for adding the lithium ion battery scrap to an acidic solution, and leaching the lithium ion battery scrap under conditions in which a solid of aluminum is present in the acidic solution; and a copper separation step following the leaching step, for separating copper included as a solid in the acidic solution from the acidic solution.

The method of disposal of hazardous waste coexists in a kind of more metals

本发明公开了一种多金属共存危险废物的处置方法，包括以下步骤，首先，把多金属混合危险废弃物与水按照1:3‑5的重量比例混合搅拌制成浆料，往浆料内加入98％浓硫酸，搅拌至充分反应，终点PH值控制在0.5‑1之间，固液分离，得到浸出液A和固体，然后，从浸出液A和固体中按照顺序将多金属中的Zn、Cu、Ni、Fe、Cr、Ca分步提取,提取顺序为：Ca─Cu─Fe和Cr─Ni─Zn─Fe─Cr，实现了多金属混合中各金属元素分步提取的方法，实现了废弃物资源化回收利用，节能减排，实现了无害化、无渣化处理的工艺，减少了湿法冶金尾渣对环境的危害和对土地资源的占用，降低了重金属废料堆对环境的污染。

The method that nickel cobalt is precipitated in laterite nickel ore hydrometallurgical

本发明提供了一种红土镍矿湿法冶炼中沉淀镍钴的方法。该方法包括：步骤一，将红土镍矿进行酸浸，得到含镍钴酸浸液，且含镍钴酸浸液中含有镁离子；步骤二，将含镍钴酸浸液进行沉淀反应，且在沉淀反应过程中持续添加新鲜的含镍钴酸浸液和沉淀剂，得到镍钴沉淀液；步骤三，将镍钴沉淀液进行浓密分离，得到沉镍钴底流；并将沉镍钴底流分为第一部分和第二部分；步骤四，将第一部分沉镍钴底流与石灰乳混合形成混合矿浆，并将混合矿浆返回至步骤二中作为至少部分沉淀剂；将第二部分沉镍钴底流进行钙镍分离，得到氢氧化镍钴。上述方法中，氢氧化镍钴的沉淀性能更佳，有利于提高浓密分离速度、提高浓密底流固含量，同时降低氢氧化镍钴产品的含水率。

METHOD AND APPARATUS FOR CONTROLLING THE SEPARATION OF METALS

DONDE LA SEPARACION DEL METAL ES EFECTUADA EN UNO O MAS REACTORES,Y EN CONJUNCION CON EL REACTOR SE MIDE EL POTENCIAL REDOX Y LA ACIDEZ Y/O BASICIDAD, Y LAS VARIABLES DE SEPARACION DEL METAL SON REGULADAS EN LA DIRECCION DESEADA BASANDOSE EN LOS RESULTADOS DE LA MEDICION, SIENDO LAS MEDICIONES DEL POTENCIAL REDOX EFECTUADAS DESDE EL SEDIMENTO PRODUCIDO EN EL REACTOR FUERA DEL RECIPIENTE DEL REACTOR Y EL INSTRUMENTO MEDIDOR ES LAVADO A INTERVALOS DE 1 A 2 HORAS, Y LA ACIDEZ Y/O BASICIDAD DE LA SOLUCION DEL REACTOR ES DETERMINADA POR MEDIO DEL VALOR TB. CON LOS RESULTADOS DE LA MEDICION SE REGULA LA INTRODUCCION DE POLVO DE ZINC, EL POTENCIAL REDOX DEL SEDIMENTO, LA ACIDEZ/BASICIDAD DE LA SOLUCION, EL CONTENIDO DE LA MATERIA SOLIDA Y/O LA TEMPERATURA DEL REACTOR. EL APARATO COMPRENDE POR LO MENOS UN INSTRUMENTO DE MEDICION PARA MEDIR EL POTENCIAL REDOX Y LA ACIDEZ Y/O BASICIDAD EN CONJUNCION CON EL REACTOR; POR LO MENOS LAS VARIABLES DE SEPARACION EN LA DIRECCION DESEADA CON LA MEDICION; POR LO MENOS UN DISPOSITIVO DE CONTROL PARA MEDIR LOS RESULTADOS DESDE DICHO INSTRUMENTO PARA ADELANTAR LOS RESULTADOS DE LA MEDICION; MEDIOS PARA PURIFICAR EL INSTRUMENTO MEDIDOR; UN DISPOSITIVO DE DETERMINACION DEL VALOR BT; Y UN DISPOSITIVO DE ALIMENTACION PARA INTRODUCIR POLVO DE ZINC AL REACTOR DE SEPARACION. EL INSTRUMENTO ESTA DISPUESTO FUERA DEL RECIPIENTE Y ESTA COLOCADO EN CONJUNCION CON LA TUBERIA CONECTADA AL REACTOR, FLUYENDO POR LA TUBERIA EL SEDIMENTO PRODUCIDO EN EL REACTOR WHERE THE METAL SEPARATION IS EFFECTED IN ONE OR MORE REACTORS, AND IN CONJUNCTION WITH THE REACTOR THE REDOX POTENTIAL AND THE ACIDITY AND / OR BASICITY ARE MEASURED, AND THE METAL SEPARATION VARIABLES ARE REGULATED IN THE DESIRED DIRECTION BASED ON THE RESULTS OF THE MEASUREMENT, BEING THE MEASUREMENTS OF THE REDOX POTENTIAL MADE FROM THE SEDIMENT PRODUCED IN THE REACTOR OUTSIDE THE REACTOR CONTAINER AND THE MEASURING INSTRUMENT IS WASHED AT INTERVALS OF 1 TO 2 HOURS, AND THE ACIDITY AND / OR ...

Liquid storage apparatus and method of controlling the pressure in the same

The present invention is directed towards a liquid storage apparatus for use in the sulfurization facility for sulfurizing a sulfate solution to produce a sulfide, the apparatus comprising a plurality of liquid storage vessels for storing a slurry or a filtrate after solid/liquid separation, a collective conduit for collectively passing an inactive gas to be fed into the liquid storage vessels or an exhaust gas discharged from the liquid storage vessels, and a pressure control conduit for receiving the flow of the inactive gas and the exhaust gas in order to control the pressure at the inner side of the liquid storage vessels. The pressure control conduit is connected by a junction to the collective conduit and equipped with a pair of pressure control valves mounted at both, front and rear, sides of the junction communicating to the collective conduit.

The recovery of nickel and/or cobalt from solutions containing salts thereof

A kind of method of the nitric acid or sulfuric acid electroplating wastewater of Treatment of Copper nickel

本发明公开了一种处理含铜镍的硝酸或硫酸电镀废水的方法，在含铜镍的硝酸或硫酸电镀废水中加入置换剂，置换剂与铜镍反应生成粗铜镍泥，固液分离后得到粗铜镍泥和含硝酸根或硫酸根的母液一；将粗铜镍泥通过纯水洗涤过滤后，得到铜镍泥；在母液一中加入脱硝剂，进行脱硝处理，脱硝剂与硝酸根或硫酸根反应，得到硝酸、硫酸、硝酸盐、硫酸盐中的一种或几种，并得到含脱硝剂的电镀废水：脱硝剂母液二，将脱硝剂母液二和纯水回用。本发明是一种新型绿色环保工艺，此方法操作简单，生产成本低，经济效益高，且无危废渣，真正实现电镀废水资源化和零排放。

Method for production of metallic cobalt from the nickel solvent extraction raffinate

"Method for production of metallic cobalt from the raffinate from solvent extraction of nickel". Said method comprises the following stages: (A) obtaining the raffinate from solvent extraction of nickel, for production of cobalt; (B) adding a sulfide precipitation agent to said raffinate, for cobalt sulfide and zinc sulfide precipitation; (C) removing all ammonia from the sulfidized pulp (solids and liquid); (D) subjecting the filtered solid - cobalt sulfide (and impurities) - to atmospHeric leaching; (E) reducing to a minimum the zinc concentration in the cobalt round, by means of solvent extraction with D2EPHA extractant diluted in Escaid 110 solvent or equivalent solvent, in any solvent extraction system comprising the required number of extraction, scrubbing, and stripping stages, with resident time of not less than 1 minute at each of the stages used; (F) performing nickel removal by ion exchange, for nickel purification; (G) adding sodium carbonate to the solution, for cobalt carbonate precipitation; (H) leaching the produced cobalt carbonate in a system that utilizes an acid, preferably sulfuric acid, and more preferably, the anolyte from cobalt electrolysis; (I) performing cobalt electrowinning so as to recover the cobalt from the solution in its metallic form; and (J) allowing the metallic cobalt to settle on insoluble stainless steel plates during the time required for production of the cobalt cathodes.

Method for producing high-purity nickel sulfate

Provided is a method of producing high-purity nickel sulfate by an impurity-element removal method for selectively removing Mg from a Ni-containing solution. The method comprises a production process of producing nickel sulfate from a Ni-containing acid solution, the acid solution being treated in order of steps (1) to (3): (1) carbonation step, adding a carbonating agent into the Ni-containing solution to make Ni contained in the Ni-containing solution into a precipitate of nickel carbonate or a mixture of nickel carbonate and nickel hydroxide, thereby forming a slurry after carbonation including the precipitate and a solution after carbonation; (2) solid-liquid separation step, separating the slurry after carbonation formed in the carbonation step into the precipitate and the solution after carbonation; and (3) neutralization step, adding a neutralizing agent into the solution after carbonation separated through the solid-liquid separation step to recover Ni contained in the solution after carbonation as a Ni-precipitate.

Recovery of nickel and other h2s precipitable metals normally associated with nickel

Process for recovering rare earth metal from oxide ore by concentration and separation

A process for recovering scandium economically with high efficiency by concentration and separation from an oxide ore containing nickel and a small amount of scandium as well as a large amount of iron and/or aluminum comprises the steps of acid leaching the oxide ore under a high-temperature, high-pressure oxidative atmosphere while restraining leaching of the iron and/or aluminum, thereby selectively leaching substantially all nickel and scandium from the ore, recovering the nickel from the resulting leaching solution as a precipitated sulfide while not precipitating the scandium as a sulfide but leaving the total amount thereof in the solution, and then adjusting the pH of the solution with a precipitant to recover the scandium from the solution as a high-concentration scandium hydroxide or carbonate by concentration and separation.

Nickel refining method

The present invention provides a nickel refining method which uses nickel sulfide produced from nickel oxide ore using a hydrometallurgical process, as the raw material, and in which chlorine leaching is performed using a chloride solution, wherein a cementation reaction is caused between the nickel sulfide and copper ions, using copper ions, preferably included in the leaching solution itself, and a portion of the nickel in the nickel sulfide is leached into the solution, and the remaining nickel and copper are left as a residue, and copper and nickel are chlorine leached from this residue, and wherein the cementation reaction is performed with an oxidation-reduction potential as measured by a silver-silver chloride electrode of below −20 mV, preferably below −100 mV.

Wet treatment process of laterite-nickel ore

本发明提供了一种红土镍矿的湿法处理工艺。该湿法处理工艺包括：步骤S1，对红土镍矿进行酸浸处理得到含铁酸浸渣和酸浸液；步骤S2，采用钢渣粉调节酸浸液的pH值在1.5～1.8进行预中和得到膏渣和预中和液；步骤S3，采用钢渣粉调节预中和液的pH值为3.5～4.8进行除铁铝得到含铁铝渣和除铁铝液；步骤S4，采用硫酸调节除铁铝液的pH值为3.5～5.5后采用金属粉置换除铁铝液中的镍钴得到除镍钴后贫液和含镍钴沉淀物，金属粉为粒径在1nm～100μm的金属粉。采用置换的方式去除除铁铝液中的镍钴，使得镍钴以金属单质的形式从除铁铝液中分离出来，由于其组成特点，所得到的含镍钴沉淀物中的含水量很少，因此便于运输。

Method and apparatus for controlling metal separation

The invention relates to a method and apparatus for controlling a continuous metal removal in conjunction with a zinc preparation process, in which the metal removal is performed in one or more reactors ( 11 a - c ), in conjunction with the reactor, the redox potential ( 16 a - c ) and the acidity and/or basicity are measured, and based on the measurement results, the process variables ( 17 a - c ) of the metal removal are adjusted towards the desired direction. According to the invention, the redox potential measurements ( 16 a - c ) are performed from the sludge produced in the reactor in conjunction with the outlet pipe of the reactor outside the reactor, and the measuring instrument ( 16 a - c ) is purified at predetermined intervals.

Method for separating cobalt and nickel

具備：加熱鋰離子二次電池進行熱處理之熱處理步驟(S1)、粉碎及分級熱處理後的鋰離子二次電池，得到至少含鈷、鎳、銅及鋰的電極材料之粉碎選別步驟(S2)，在含硫酸及過氧化氫的處理液浸漬電極材料得到浸出液之浸出步驟(S3)，對浸出液加入硫化氫化合物攪拌之後，進行固液分離，得到含鈷及鎳的溶出液，與含硫化銅的殘渣之銅分離步驟(S4)，對溶出液加入鹼金屬氫氧化物進行pH調整之後，加入硫化氫化合物而攪拌，進行固液分離，得到含硫化鈷及硫化鎳的沉澱物，與含鋰的殘留液之鈷/鎳分離步驟(S5)。

Method for directly removing copper, cadmium, cobalt and nickel from zinc hydrometallurgy solution in one step

本发明公开了一种一步直接从湿法炼锌溶液中脱除铜、镉、钴、镍的方法。该方法是在高温高压下，以锌粉为净化剂，利用化学置换的方法将湿法炼锌溶液中的铜、镉、钴、镍等杂质还原为相应的金属态，使之从溶液中沉淀脱除，过滤后即可得到铜、镉、钴、镍浓度均低于0.1mg/L的净化后液，所得净化后液可满足锌电解技术指标。利用这一方法，不仅可实现铜、镉、钴、镍的一步深度净化，还可完成铜、镉、钴、镍的富集，因而本方法具有流程短、效率高、锌粉耗量低、净化成本低的优点，同时所得净化渣中铜、镉、钴、镍富集效果好，有利于后续综合利用。

Process for recovering non-ferrous metals from a solid matrix

本发明涉及用于从固体基质中回收有色金属的方法，包括如下阶段：(a)在氧存在下，在温度100℃-160℃和压力150kPa-800kPa下，用含氯离子和铵离子、pH为6.5-8.5的含水基溶液沥滤固体基质，以获得包含沥滤金属的提取溶液和固体沥滤残余物；(b)将所述固体沥滤残余物与所述提取溶液分离；(c)使所述提取溶液经历至少一次置换沉淀以回收元素态的金属。

Deposition formation preventing method for liquid food treating device, involves separating stream of liquid food from mainstream, adding calcium salt to stream of liquid food, and re-introducing stream of liquid food into mainstream

The method involves separating a stream of liquid food from a mainstream of liquid food supplied to a liquid food treating device. Calcium salt is added to the stream of liquid food, and a precipitation of the calcium salt is formed. The liquid food stream is re-introduced into the mainstream of the liquid food such that the calcium precipitate floats on the mainstream of liquid food. An independent claim is also included for a device for treating a liquid food, comprising a main supply.

Battery recycling by hydrogen gas injection in leach

The present invention relates to a process for the recovery of transition metals from batteries comprising (a) treating a transition metal material with a leaching agent to yield a leach which contains dissolved salts of nickel and/or cobalt, (b) injecting hydrogen gas in the leach at a temperature above 100 °C and a partial pressure above 5 bar to precipitate nickel and/or cobalt in elemental form, and (c) separation of the precipitate obtained in step (b).

Method for treating nickel laterite ore

The invention relates to a method for processing laterite ores so that the metals contained in the laterites are turned into water-soluble form for the recovery of valuable metals, such as nickel and cobalt. Different types of nickel laterites are processed at the same time without being separated according to their iron and/or magnesium content. When laterites are pretreated with concentrated mineral acid so that the metals contained in the laterites react to form water-soluble salts, the silicates contained in the laterites are partially decomposed and postleaching liquid-solid separation becomes easier than it was previously. According to the method, the water vapour generated in the ore and acid reaction stage is utilised in ore drying and the unreacted mineral acid is recycled to the front end of the process.

Method for producing high-purity nickel surface

Provided is a production method for obtaining high purity nickel sulfate having low levels of impurities, particularly low levels of magnesium and chloride, by adjusting the concentration of an extractant and the pH concentration at the time of treatment in a process of obtaining a nickel sulfate solution having a high nickel concentration by solvent extraction using an acidic organic extractant.

Purification method of cobalt chloride aqueous solution

Method for treating nickel laterite ore

The invention relates to a method for processing laterite ores so that the metals contained in the laterites are turned into water-soluble form for the recovery of valuable metals, such as nickel and cobalt. Different types of nickel laterites are processed at the same time without being separated according to their iron and/or magnesium content. When laterites are pretreated with concentrated mineral acid so that the metals contained in the laterites react to form water-soluble salts, the silicates contained in the laterites are partially decomposed and postleaching liquid-solid separation becomes easier than it was previously. According to the method, the water vapour generated in the ore and acid reaction stage is utilised in ore drying and the unreacted mineral acid is recycled to the front end of the process.

一种从废旧三元锂电池中分步沉淀回收镍、钴和锰的方法

本发明公开了一种从废旧三元锂电池中分步沉淀回收镍、钴和锰的方法，包括如下步骤：1)预处理：将废旧三元锂电池正负极粉末煅烧备用；2)配置镍钴锰浸出液：将氢键供体、氢键受体及稀释剂配置成镍钴锰浸出溶液备用；3)锂分离处理：将煅烧后的粉末加水进行浸出，浸出完成后进行第一次过滤得到的滤液为碳酸锂溶液；4)镍钴锰分离处理：将第一次过滤得到的滤渣与镍钴锰浸出溶液混合进行反应，反应完成后进行第二次过滤得到镍化合物；将第二次过滤得到的滤液加钴沉淀剂沉淀反应后进行第三次过滤得到钴化合物和锰化合物。本发明实现锂镍钴锰的高效分步分离，回收率高，且避免强酸强碱等对设备的腐蚀，加工成本低。

浸出液中の水素ガス注入による電池のリサイクル

一种从钕铁硼废料盐酸优溶法所得铁尾渣中选择性浸出稀土和钴的方法

本发明提供了一种从钕铁硼废料盐酸优溶法所得铁尾渣中选择性浸出稀土和钴的方法，先通过机械活化，将铁尾渣中被难溶赤铁矿相(Fe 2 O 3 )包裹的稀土和钴的氧化物充分解离，再使用低浓度的酸液进行选择性浸出，使得稀土和钴的氧化物基本上完全浸出，最后收集浸出液进行除铁，即可得到含有稀土和钴的净化液，进而分离得到稀土资源和钴资源。本发明所述方法协同机械活化和直接酸浸，有效提高了铁尾渣中稀土和钴的浸出率，使得钴的浸出率在80％以上，稀土的浸出率在70％以上，优选条件下可以使得钴的浸出率达89.5％以上，稀土的浸出率达86.5％以上，易于大规模工业化生产，具有显著的经济和环境效益。

一种新型铁粉还原反应回收蚀刻液方法及装置

本发明涉及资源回收技术领域，且公开了一种新型铁粉还原反应回收蚀刻液方法及装置，该方法，包括以下步骤；步骤一：向反应槽内部注入蚀刻废液，到达设置上限时，开动搅拌件对蚀刻废液进行搅拌；步骤二：对搅拌时的蚀刻废液内部投加酸碱药剂和铁粉，直至反应1.5小时后停止投加铁粉；步骤三：开动循环水泵，抽取反应液流出反应槽。该种新型铁粉还原反应回收蚀刻液装置，利用铁粉还原反应，低温反应置换废液中的铜，回收海绵铜。高温反应置换废液中的镍，磁回收废液中的剩余铁粉和镍粉，高效凝聚法去除废液中的铬等重金属，因此运行成本低，同时能够对蚀刻液内部所含带的重金属进行回收，从而避免对环境造成严重污染的情况。

一种废旧锂电池综合回收的方法

本发明涉及一种废旧锂电池综合回收的方法，废旧锂电池综合回收的方法包括以下步骤：a.破碎；b.料浆电解；c.过筛；d.过滤；e.除油；f.除铜；g.除铁；h.除杂；i.置换；j.萃取；k.调酸；l.沉淀；m.MVR+结晶；n.细磨；o.反萃取；p浸出；q.置换渣浸出液除铁。本发明的有益效果是：该废旧锂电池综合回收的方法，一方面结合了传统的处理方法，可得到更为纯净的铜粉、铝粉和碳粉，本专利可生产用于锂电池正极前驱体生产的硫酸锰和硫酸镍钴锰结晶，工艺流程较传统方法更短，成本更低，本专利提高了电池至最终产品的直收率，简化的电池拆解和酸溶过程，减少了过程损失；工艺流程简化和缩短，产生渣量少，过程损失减少。

Nickel-iron wet treatment method and application thereof

Disclosed are a nickel-iron wet treatment method and an application thereof. The treatment method comprises: in a high-pressure oxygen environment, mixing a crushed nickel-iron material, sulphuric acid and a corrosion aid, performing an acid leaching reaction, then performing solid-liquid separation on slurry subjected to acid leaching, adding an oxidant into the obtained filtrate, performing heating, removing the corrosion aid, adding a precipitating agent into the filtrate, controlling the pH value of the filtrate, and performing solid-liquid separation to obtain a ferric hydroxide precipitate and a nickel-containing filtrate; and performing extraction and back extraction on the nickel-containing filtrate to prepare battery-grade nickel sulphate. According to the present invention, the nickel-iron is subjected to oxidation acid dissolution in cooperation with the corrosion aid under the high-pressure oxygen and acidic conditions; the nickel-iron is extremely prone to oxidation in the high-pressure oxygen environment; and a strong oxidant is added into the filtrate subsequently, so that ferrous ions in the filtrate are completely converted into ferric ions, and the corrosion aid can be oxidized to generate pollution-free carbon dioxide and water, thereby avoiding the impact of the corrosion aid on the subsequent extraction process.