CN109234545B - Method for leaching cobalt matte or cobalt matte and cobalt ore mixture - Google Patents
Method for leaching cobalt matte or cobalt matte and cobalt ore mixture Download PDFInfo
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- CN109234545B CN109234545B CN201811080342.3A CN201811080342A CN109234545B CN 109234545 B CN109234545 B CN 109234545B CN 201811080342 A CN201811080342 A CN 201811080342A CN 109234545 B CN109234545 B CN 109234545B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0407—Leaching processes
- C22B23/0415—Leaching processes with acids or salt solutions except ammonium salts solutions
- C22B23/0423—Halogenated acids or salts thereof
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0407—Leaching processes
- C22B23/0415—Leaching processes with acids or salt solutions except ammonium salts solutions
- C22B23/043—Sulfurated acids or salts thereof
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0453—Treatment or purification of solutions, e.g. obtained by leaching
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Abstract
The invention provides a method for leaching cobalt matte or a mixture of cobalt matte and cobalt ore, which comprises the steps of adding an acid solution into the mixture of cobalt matte or cobalt matte and cobalt ore for slaking and leaching, and then sequentially carrying out water adding dissolution, solid-liquid separation, neutralization reaction, solid-liquid separation, lime adding for adjusting pH to remove iron, lime adding for adjusting pH to remove aluminum and silicon, and solid-liquid separation to obtain leachate. The invention has the advantages of short production flow, high efficiency, low cost, reduced raw material consumption and more than 99 percent of cobalt leaching rate.
Description
Technical Field
The invention belongs to the technical field of hydrometallurgy, and particularly relates to a method for leaching cobalt matte or a mixture of cobalt matte and cobalt ore.
Background
With the rapid development of lithium ion batteries, the application of simple substance cobalt and cobalt compounds is increasingly wide, especially the demand in the field of lithium batteries is rapidly increased, but the cobalt resource in China is poor and is mostly associated minerals, more than 90% of the cobalt resource depends on the import of Africa, the cost is higher, and the imported minerals mainly comprise water cobalt minerals, cobalt nickel sulfide minerals, arsenic cobalt minerals, cobalt iron alloys, crude cobalt hydroxide, cobalt carbonate and the like. At present, in China, a cobalt enrichment solution is mainly obtained through main processes of cobaltite-reduction acid leaching, cobalt alloy-oxidation acid leaching, cobalt nickel sulfide ore high-pressure oxygen leaching, crude cobalt salt-acid dissolution and the like, and then cobalt salt or metal cobalt is obtained through the working procedures of purification and impurity removal, extraction, evaporative crystallization, electrolysis and the like.
Concentrated acid slaking heap leaching is a strengthening leaching technology commonly used in hydrometallurgy, mainly comprises the procedures of sulfuric acid mixing, slaking, washing and the like, and is commonly used for treating some refractory ores with higher residual acidity requirements in recent years. The process has the following characteristics: under the conditions of high acid and high temperature, the internal structure of the mineral is thoroughly destroyed, valuable metals are thoroughly leached, meanwhile, silicate is transformed into multi-dimensional, porous, amorphous and high-activity silica, and smelting tailings have high development value.
The treatment of cobalt ore generally adopts sulfuric acid leaching, Co3+Is not easily leached by acid and is usually reduced to Co2+Leaching by using common reducing agents such as ferrous sulfate, sulfur dioxide, sodium sulfite, sodium pyrosulfite and the like. The leaching consumes a plurality of chemical reagents, the cost is higher, and simultaneously, sodium introduced by the reducing agent is discharged in the form of sodium-containing wastewater, thereby causing environmental pollution.
Cobalt in the cobalt matte is +2, the cobalt matte has high iron content, and the cobalt and the iron can be leached by a concentrated acid curing heap leaching process. The +3 cobalt compounds in cobalt minerals are strong oxidizers and difficult to leach directly with acid, but can react with many reductants. Part of + 3-valent cobalt exists in the cobalt ore, and the leaching effect of sulfuric acid curing on the cobalt is not obvious, so that the cobalt ore is often leached by a reduction leaching method to improve the leaching rate. CN107858506A discloses a leaching process of a cobaltite and cobalt salt intermediate product, which uses Fe2+The cobalt salt intermediate product is used as a reducing agent to adjust the pH value to leach the cobalt, wherein the oxidation mode is to introduce high-pressure air, and the cobalt salt intermediate product is cobalt hydroxide/cobalt carbonate. The invention with publication number CN108315553A discloses a method for leaching cobalt sulfide ore at normal pressure by adopting a sodium chlorate-sulfuric acid system, which uses sulfuric acid to dissolve minerals, uses sodium chlorate as an oxidant to oxidize sulfur into sulfate ions which enter a solution, and Fe2+Oxidation to Fe3+，Fe3+And the cobalt sulfide is subjected to oxidation-reduction reaction with cobalt sulfide ore, so that leaching of cobalt is facilitated. The method has low requirement on equipment, short production period and low energy consumption, the leaching rate of cobalt reaches more than 99 percent, but the intermediate product of the oxidant is ClO2It is not good for removing impurities.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a cobalt matte leaching method or a cobalt matte and cobalt ore mixture leaching method which has the advantages of short production flow, high efficiency, low cost, reduced raw material consumption and more than 99 percent of cobalt leaching rate.
The invention adopts the following technical scheme:
a method of cobalt matte leaching or mixture leaching of cobalt matte and cobalt ore, characterized in that the method comprises the steps of:
(1) adding an acid solution into cobalt matte or a mixture of the cobalt matte and cobalt ore, mixing, curing and leaching, and then sequentially adding water to dissolve and carrying out solid-liquid separation to obtain a first leaching solution and a first leaching residue;
(2) adding a cobalt intermediate into the first leaching solution, carrying out neutralization reaction, and then carrying out solid-liquid separation to obtain a second leaching solution and second leaching residues, wherein the second leaching residues return to the curing leaching process in the step (1);
(3) adding lime into the second leaching solution to adjust the pH value, removing iron, and then carrying out solid-liquid separation to obtain a third leaching solution and iron slag;
(4) and adding lime into the third leaching solution to adjust the pH value, removing aluminum and silicon, and then carrying out solid-liquid separation to obtain a fourth leaching solution.
The method as described above, wherein the acid solution is a sulfuric acid solution or hydrochloric acid.
The method is characterized in that the cobalt matte in the step (1) comprises the following components in percentage by mass: 5.3 to 10 percent of Co, 20 to 40 percent of Fe, 0.5 to 5 percent of Cu, 0.5 to 1.4 percent of Al, 0.2 to 1.5 percent of Mg, and SiO220% -45% of the total weight of the composition, and 14% -24% of the total weight of the composition; the cobalt ore comprises the following components in percentage by mass: 3.2 to 22 percent of Co, 0.2 to 7.6 percent of Fe, 0.5 to 10.53 percent of Cu, 0.14 to 1.9 percent of Mn, 0.6 to 1.5 percent of Mg, and SiO240% -60% and the others 6% -18%.
The method is characterized in that in the mixture of the cobalt matte and the cobalt ore in the step (1), the mass percent of the cobalt matte is 41-100%, and the mass percent of the cobalt ore is 59-0%.
The method is characterized in that in the step (1), the conditions for adding the cobalt matte or the mixture of the cobalt matte and the cobalt ore into the acid solution for mixing and carrying out slaking leaching are as follows: the concentration of hydrogen ions in the acid solution is 6-20 mol/L, the mass ratio of mixed solid to liquid is 1 (0.3-3), the mixing time is 2-30 min, the temperature of curing and leaching is 80-250 ℃, and the time of curing and leaching is 0.5-72 h.
According toThe method is characterized in that SiO in the first leaching slag2The mass percentage of the composite filter aid is 70-99 percent, and the composite filter aid can be used as building materials or sewage filter aids.
The method as described above, wherein the cobalt intermediate is cobalt hydroxide or cobalt carbonate.
The method according to the above, characterized in that the iron removal method in step (3) is a goethite iron removal method, and the pH of the iron removal is 2.5 to 3.5; the iron content of the iron slag is 15-55%, and the iron slag can be processed into fine iron powder or iron oxide red pigment.
The invention has the beneficial effects that: compared with the prior art, the invention adopts the acid solution curing leaching process to leach the cobalt matte or the mixture of the cobalt matte and the cobalt ore, and utilizes the characteristics of high acid and high temperature of the process to accelerate the leaching speed and improve the leaching rate; cobalt matte and cobalt ore are mixed and leached, and Fe in cobalt matte leaching liquid is utilized2+Reduction of Co in cobalt ores3+The two raw materials supplement each other, the processes complement each other, an oxidation-reduction system can be constructed by the leaching slag, the advantages of the raw materials are fully exerted, the use of a cobalt ore leaching reducing agent and the use of a cobalt matte leaching solution iron-precipitating oxidizing agent are avoided, and the leaching slag has the characteristics of multiple dimensions, porosity, large specific surface area, high activity and the like, and has great development value; and finally, realizing the slag-free development and utilization of cobalt matte, cobalt ore and iron slag by adopting a goethite iron removal process.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Detailed Description
The invention relates to a method for leaching cobalt matte or a mixture of cobalt matte and cobalt ore, which comprises the following steps: (1) adding an acid solution into cobalt matte or a mixture of the cobalt matte and cobalt ore, mixing, curing and leaching, adding water for dissolving, and performing solid-liquid separation to obtain a first leaching solution and a first leaching slag, wherein the cobalt matte is a smelting intermediate product and comprises the following components in percentage by mass: 5.3 to 10 percent of Co, 20 to 40 percent of Fe, 0.5 to 5 percent of Cu, 0.5 to 1.4 percent of Al, 0.2 to 1.5 percent of Mg, and SiO220% -45% of the total weight of the composition, and 14% -24% of the total weight of the composition; the cobalt ore comprises the following components in percentage by mass: co 3.2-22 wt%, Fe 0.2-7.6 wt% and Cu 0.5 wt%-10.53％，Mn 0.14％-1.9％，Mg 0.6％-1.5％，SiO240% -60% of the total weight of the composition, and 6% -18% of the total weight of the composition; because the raw material is cobalt matte or a mixture of cobalt matte and cobalt ore, when different raw materials are adopted, the components and the mass percentage contents of the obtained first leaching solution and first leaching slag, the obtained second leaching solution and second leaching slag, the obtained third leaching solution and iron slag and the obtained fourth leaching solution are respectively different substances and numerical values. In the mixture of cobalt matte and cobalt ore, the mass percent of the cobalt matte is 41-100%, and the mass percent of the cobalt ore is 59-0%; the conditions for adding acid solution into the mixture of cobalt matte or cobalt matte and cobalt ore for mixing and slaking and leaching are as follows: the concentration of hydrogen ions in the acid solution is 6-20 mol/L, the mixed solid-liquid mass ratio is 1 (0.3-3), the mixing time is 2-30 min, the temperature of curing leaching is 80-250 ℃, the time of curing leaching is 0.5-72 h, the acid-ore mixing mode is stirring mixing or rotary kiln stirring mixing, the curing leaching mode is heap leaching or pool leaching, so that metal elements in the cobalt sulfonium or the mixture of the cobalt sulfonium and the cobalt ore are leached in an ion form; mixing the mixture of cobalt matte and cobalt ore with acid solution to obtain Fe of cobalt matte leaching solution2+And reduction leaching of Co in cobalt ore3+Oxidation-reduction reaction takes place, Fe2+Is oxidized into Fe3+Is easy to settle and remove; SiO in the first leaching slag2The mass percentage of the composite filter aid is 70-99 percent, and the composite filter aid can be used as building materials or sewage filter aids. (2) And (3) adding a cobalt intermediate product into the first leaching solution, carrying out neutralization reaction, and then carrying out solid-liquid separation to obtain a second leaching solution and second leaching residues, wherein the second leaching residues return to the aging leaching process in the step (1), and the cobalt intermediate product is cobalt hydroxide or cobalt carbonate, so that the leaching rate of cobalt is improved. (3) Adding lime into the second leaching solution to adjust the pH value to 2.5-3.5, removing iron, and then carrying out solid-liquid separation to obtain a third leaching solution and iron slag, wherein the iron removal method is a goethite iron removal method, the iron content of the iron slag is 15% -55%, and the iron slag can be processed into fine iron powder or iron oxide red pigment. (4) And adding lime into the third leaching solution to adjust the pH value to 5-6, removing aluminum and silicon, then carrying out solid-liquid separation to obtain a fourth leaching solution, and producing cobalt salt or producing cobalt metal by electrodeposition through a cobalt salt system or an electrodeposition cobalt system by the fourth leaching solution.
The present invention is further explained below with reference to specific examples, and table 1 shows the components and mass percentages of cobalt matte and cobalt ore used in the examples.
TABLE 1 Comatte and Cobalite compositions and mass percents thereof
Example 1
Weighing 0.6kg of cobalt matte and 0.6kg of sulfuric acid solution with the concentration of 10mol/L, mixing the cobalt matte and the sulfuric acid solution for curing and heap leaching, mixing for 2min, curing and heap leaching at 160 ℃ for 0.5h, adding water for dissolving, performing solid-liquid separation to obtain a first leaching solution and first leaching residues, slurrying and washing the first leaching residues for three times, and drying, wherein the first leaching residues comprise the following main components in percentage by mass: 0.071% of cobalt, 0.89% of iron, 83.21% of silicon dioxide, and 99.2% of cobalt leaching rate. The acid content of the first leaching solution is 80g/L, cobalt hydroxide is added into the first leaching solution for neutralization reaction until the acid content is 1.4g/L, solid-liquid separation is carried out to obtain a second leaching solution and second leaching residues, and the second leaching residues are returned to the aging heap leaching process. And adding lime into the second leaching solution to adjust the pH value to 2.5, then removing iron by adopting a goethite iron removal method, carrying out solid-liquid separation after removing iron to obtain a third leaching solution and iron slag, and processing the iron slag into iron concentrate. And adding lime into the third leaching solution to adjust the pH value to 5, and carrying out solid-liquid separation after aluminum and silicon are removed to obtain a fourth leaching solution. The cobalt recovery was 94.8%.
Example 2
Weighing 40kg of cobalt matte and 120kg of hydrochloric acid with the concentration of 6mol/L, mixing the cobalt matte and the hydrochloric acid for curing and heap leaching, mixing for 15min, curing and heap leaching at 80 ℃ for 48h, adding water for dissolving, performing solid-liquid separation to obtain a first leaching solution and first leaching residues, pulping and washing the first leaching residues for three times, and drying the first leaching residues, wherein the first leaching residues comprise the following main components in percentage by mass: 0.042% of cobalt, 1.21% of iron, 85.01% of silicon dioxide and 99.5% of cobalt leaching rate. The acid content of the first leaching solution is 30g/L, cobalt hydroxide is added into the first leaching solution for neutralization reaction until the acid content is 1g/L, solid-liquid separation is carried out to obtain a second leaching solution and second leaching residues, and the second leaching residues are returned to the curing and heap leaching process. And adding lime into the second leaching solution to adjust the pH value to 3, then removing iron by adopting a goethite iron removal method, carrying out solid-liquid separation after iron removal to obtain a third leaching solution and iron slag, and processing the iron slag into iron concentrate. And adding lime into the third leaching solution to adjust the pH value to 6, removing aluminum and silicon, and then carrying out solid-liquid separation to obtain a fourth leaching solution. The cobalt recovery was 95.85%.
Example 3
Weighing 100kg of cobalt matte and 30kg of sulfuric acid solution with the concentration of 6mol/L, mixing the cobalt matte and the sulfuric acid solution for curing and heap leaching, mixing for 30min, curing and heap leaching at 250 ℃ for 72h, adding water for dissolving, performing solid-liquid separation to obtain a first leaching solution and first leaching residues, slurrying and washing the first leaching residues for three times, and drying, wherein the first leaching residues comprise the following main components in percentage by mass: 0.063% of cobalt, 1.14% of iron, 85.6% of silicon dioxide and 99.5% of cobalt leaching rate. The acid content of the first leaching solution is 60g/L, cobalt hydroxide is added into the first leaching solution for neutralization reaction until the acid content is 1.2g/L, solid-liquid separation is carried out to obtain a second leaching solution and second leaching residues, and the second leaching residues are returned to the aging heap leaching process. And adding lime into the second leaching solution to adjust the pH value to 3.5, then removing iron by adopting a goethite iron removal method, carrying out solid-liquid separation after removing iron to obtain a third leaching solution and iron slag, and processing the iron slag into iron concentrate. And adding lime into the third leaching solution to adjust the pH value to 5.5, removing aluminum and silicon, and then carrying out solid-liquid separation to obtain a fourth leaching solution. The cobalt recovery was 95.89%.
Example 4
Weighing a mixture of 41kg of cobalt matte and 59kg of cobalt ore, weighing 100kg of sulfuric acid solution with the concentration of 10mol/L, mixing the mixture of cobalt matte and cobalt ore and the sulfuric acid solution for curing heap leaching, mixing for 15min, curing heap leaching at 250 ℃ for 48h, adding water for dissolving, performing solid-liquid separation to obtain a first leaching solution and first leaching slag, slurrying and washing the first leaching slag for three times, and drying, wherein the first leaching slag comprises the following main components in percentage by mass: 0.023 percent of cobalt, 0.57 percent of iron, 90.17 percent of silicon dioxide and 99.6 percent of leaching rate of cobalt. The acid content of the first leaching solution is 60g/L, cobalt hydroxide is added into the first leaching solution for neutralization reaction until the acid content is 1.3g/L, solid-liquid separation is carried out to obtain a second leaching solution and second leaching residues, and the second leaching residues are returned to the aging heap leaching process. And adding lime into the second leaching solution to adjust the pH value to 2.5, then removing iron by adopting a goethite iron removal method, carrying out solid-liquid separation after removing iron to obtain a third leaching solution and iron slag, and processing the iron slag into iron concentrate. And adding lime into the third leaching solution to adjust the pH value to 5, and carrying out solid-liquid separation after aluminum and silicon are removed to obtain a fourth leaching solution. The cobalt recovery was 94.7%.
Example 5
Weighing a mixture of 60kg of cobalt matte and 40kg of cobalt ore, weighing 30kg of sulfuric acid solution with the concentration of 6mol/L, mixing the mixture of cobalt matte and cobalt ore and the sulfuric acid solution for curing heap leaching, mixing for 30min, curing heap leaching at 160 ℃ for 0.5h, adding water for dissolving, performing solid-liquid separation to obtain a first leaching solution and first leaching slag, slurrying and washing the first leaching slag for three times, and drying, wherein the first leaching slag comprises the following main components in percentage by mass: 0.016 percent of cobalt, 0.66 percent of iron, 85.2 percent of silicon dioxide and 99.7 percent of cobalt leaching rate. The acid content of the first leaching solution is 80g/L, cobalt hydroxide is added into the first leaching solution for neutralization reaction until the acid content is 1.4g/L, solid-liquid separation is carried out to obtain a second leaching solution and second leaching residues, and the second leaching residues are returned to the aging heap leaching process. And adding lime into the second leaching solution to adjust the pH value to 3, then removing iron by adopting a goethite iron removal method, carrying out solid-liquid separation after iron removal to obtain a third leaching solution and iron slag, and processing the iron slag into iron concentrate. And adding lime into the third leaching solution to adjust the pH value to 5.5, removing aluminum and silicon, and then carrying out solid-liquid separation to obtain a fourth leaching solution. The cobalt recovery was 94.9%.
Example 6
Weighing a mixture of 21kg of cobalt matte and 9kg of cobalt ore, weighing 90kg of hydrochloric acid with the concentration of 6mol/L, mixing the mixture of cobalt matte and cobalt ore with the hydrochloric acid for curing heap leaching, mixing for 2min, curing heap leaching at 80 ℃ for 72h, adding water for dissolving, performing solid-liquid separation to obtain a first leaching solution and first leaching slag, slurrying and washing the first leaching slag for three times, and drying the first leaching slag, wherein the first leaching slag comprises the following main components in percentage by mass: 0.024% of cobalt, 0.54% of iron, 84.2% of silicon dioxide and 99.5% of cobalt leaching rate. The acid content of the first leaching solution is 30g/L, cobalt hydroxide is added into the first leaching solution for neutralization reaction until the acid content is 1g/L, solid-liquid separation is carried out to obtain a second leaching solution and second leaching residues, and the second leaching residues are returned to the curing and heap leaching process. And adding lime into the second leaching solution to adjust the pH value to 3.5, then removing iron by adopting a goethite iron removal method, carrying out solid-liquid separation after removing iron to obtain a third leaching solution and iron slag, and processing the iron slag into iron concentrate. And adding lime into the third leaching solution to adjust the pH value to 6, removing aluminum and silicon, and then carrying out solid-liquid separation to obtain a fourth leaching solution. The cobalt recovery was 93.65%.
Claims (3)
1. A method of cobalt matte leaching or mixture leaching of cobalt matte and cobalt ore, characterized in that the method comprises the steps of:
(1) adding an acid solution into cobalt matte or a mixture of the cobalt matte and cobalt ore, mixing, curing and leaching, and then sequentially adding water to dissolve and carrying out solid-liquid separation to obtain a first leaching solution and a first leaching residue; the cobalt sulfonium comprises the following components in percentage by mass: 5.3 to 10 percent of Co, 20 to 40 percent of Fe, 0.5 to 5 percent of Cu, 0.5 to 1.4 percent of Al, 0.2 to 1.5 percent of Mg, and SiO220% -45% of the total weight of the composition, and 14% -24% of the total weight of the composition; the cobalt ore comprises the following components in percentage by mass: 3.2 to 22 percent of Co, 0.2 to 7.6 percent of Fe, 0.5 to 10.53 percent of Cu, 0.14 to 1.9 percent of Mn, 0.6 to 1.5 percent of Mg, and SiO240% -60% of the total weight of the composition, and 6% -18% of the total weight of the composition; in the mixture of cobalt matte and cobalt ore, the mass percent of the cobalt matte is 41-100%, and the mass percent of the cobalt ore is 59-0%; the acid solution is a sulfuric acid solution or a hydrochloric acid solution; the conditions for adding acid solution into the mixture of cobalt matte or cobalt matte and cobalt ore for mixing and slaking and leaching are as follows: the concentration of hydrogen ions in the acid solution is 6-20 mol/L, the mass ratio of mixed solid to liquid is 1 (0.3-3), the mixing time is 2-30 min, the temperature of curing and leaching is 80-250 ℃, and the time of curing and leaching is 0.5-72 h;
(2) adding a cobalt intermediate into the first leaching solution, carrying out neutralization reaction, and then carrying out solid-liquid separation to obtain a second leaching solution and second leaching residues, wherein the second leaching residues return to the curing leaching process in the step (1); the cobalt intermediate product is cobalt hydroxide or cobalt carbonate;
(3) adding lime into the second leaching solution to adjust the pH value, removing iron, and then carrying out solid-liquid separation to obtain a third leaching solution and iron slag;
(4) and adding lime into the third leaching solution to adjust the pH value, removing aluminum and silicon, and then carrying out solid-liquid separation to obtain a fourth leaching solution.
2. The method according to claim 1, characterized in that the SiO in the first leaching residue2The mass percentage of the composite filter aid is 70-99 percent, and the composite filter aid can be used as building materials or sewage filter aids.
3. The method according to claim 1, wherein the iron removal method in step (3) is a goethite iron removal method, and the pH of the iron removal is 2.5-3.5; the iron content of the iron slag is 15-55%, and the iron slag can be processed into fine iron powder or iron oxide red pigment.
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| WO2008138039A1 (en) * | 2007-05-14 | 2008-11-20 | Bhp Billiton Ssm Development Pty Ltd | Nickel recovery from a high ferrous content laterite ore |
| CN101608258B (en) * | 2008-11-20 | 2011-02-16 | 厦门钨业股份有限公司 | Method for industrially extracting cobalt, copper and iron by taking cobalt-copper alloy as raw material |
| CN101736151B (en) * | 2010-01-28 | 2012-07-25 | 浙江华友钴业股份有限公司 | Method for removing iron by oxidation and neutralization in cobalt wet smelting process |
| CN105568001A (en) * | 2016-02-03 | 2016-05-11 | 广东佳纳能源科技有限公司 | Combined high-pressure acid leaching method for cobalt alloy and oxide cobalt minerals |
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