Treatment method of nickel cobalt lithium manganate positive electrode material

Abstract

The invention relates to a treatment method of a nickel cobalt lithium manganate positive electrode material, which specifically comprises the following steps: (1) calcining a nickel cobalt manganese positive electrode material at 300-600 DEG C to obtain a calcined nickel cobalt manganese positive electrode material; (2) preparing a dilute sulphuric acid solution, adding the dilute sulphuric acid solution into the nickel-cobalt-manganese positive electrode material calcined in the step (1), heating to 90-100 DEG C, and reacting for 2 hours to obtain a low-manganese solution and leaching residues; and (3) treating the low-manganese liquid by using a low-manganese line treatment method, and treating the leached residues by using a high-manganese line treatment method. According to the treatment method of the nickel cobalt lithium manganate positive electrode material, the problems of environmental pollution, low recovery rate, more waste of useful components in a nickel cobalt lithium manganate battery and low resource utilization rate in the treatment method in the prior art are solved, and the effects of environment-friendly production and resource recycling improvement are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium ion batteries, and in particular to a method for processing a positive electrode material of lithium nickel cobalt manganese oxide. Background Art

[0002] Nickel cobalt manganese oxide is one of the key materials of lithium-ion batteries. Lithium cobalt oxide is currently the most widely used battery material, but cobalt resources are increasingly scarce and expensive, and there are safety hazards in the use of lithium cobalt oxide batteries. Nickel cobalt manganese oxide replaces more than two-thirds of the cobalt in lithium cobalt oxide with relatively cheap nickel and manganese, and has obvious cost advantages. Compared with other lithium-ion battery positive electrode materials such as lithium manganese oxide and lithium iron phosphate, nickel cobalt manganese oxide materials and lithium cobalt oxide are very close in electrochemical properties and processing properties, making nickel cobalt manganese oxide materials a new battery material and gradually replacing lithium cobalt oxide. It is mainly used for lithium-ion battery positive electrode materials, such as power batteries, tool batteries, polymer batteries, cylindrical batteries, aluminum shell batteries, etc.

[0003] The methods for treating waste nickel-cobalt-manganese-oxide lithium batteries that have been reported so far usually directly use sulfuric acid, nitric acid, citric acid, and fluorine-containing organic acids to dissolve the waste nickel-cobalt-manganese-oxide lithium. The recovery process not only produces acid-containing gas, NO waste gas, and wastewater with high acid and organic content, which causes serious pollution to the atmospheric and water environments, but also has a low recovery rate, and a large amount of useful components in the nickel-cobalt-manganese-oxide lithium batteries are wasted, resulting in a waste of resources. Summary of the invention

[0004] In response to the problems mentioned in the background technology, the present invention proposes a method for processing nickel cobalt lithium manganese oxide positive electrode materials, which solves the problems of environmental pollution, low recovery rate, large waste of useful components in nickel cobalt lithium manganese oxide batteries, and low resource utilization rate existing in the processing methods of the prior art, thereby achieving environmentally friendly production and improving the effect of resource recycling.

[0005] In order to achieve the above object, the present invention provides a method for processing a nickel cobalt manganese oxide positive electrode material, which specifically comprises the following steps: (1) calcining the nickel-cobalt-manganese positive electrode material at 300-600° C. to obtain a calcined nickel-cobalt-manganese positive electrode material; (2) preparing a dilute sulfuric acid solution, adding it to the nickel-cobalt-manganese positive electrode material calcined in step (1), heating it to 90-100° C., and reacting it for 2 hours to obtain a low-manganese solution and leached residue; (3) The low manganese liquid is treated with a low manganese wire method, and the leached residue is treated with a high manganese wire method.

[0006] Furthermore, the calcination residence time in step (1) is 5-10 minutes.

[0007] Furthermore, the concentration of dilute sulfuric acid in step (2) is 200-250 g / L.

[0008] Furthermore, in step (2), the solid-to-liquid ratio of the nickel-cobalt-manganese positive electrode material to the dilute sulfuric acid solution is (100-200):1.

[0009] Furthermore, a low manganese wire processing method specifically comprises the following steps: S1: Raise the temperature of the low manganese solution to 60-90°C, slowly add oxalic acid solid, react for 1-2 hours, and filter to obtain nickel cobalt oxalate solid and nickel cobalt precipitation solution; S2: The nickel-cobalt precipitation liquid obtained in S1 is neutralized with calcium hydroxide, and then treated with activated carbon to remove impurities, and then sodium carbonate is added to precipitate lithium to obtain industrial-grade lithium carbonate; S3: calcining the nickel cobalt oxalate solid obtained in S1 at 600-650°C for 20-40 minutes to obtain nickel cobalt oxide solid, and then washing with water to remove impurities.

[0010] S4: Add dilute sulfuric acid solution to the nickel cobalt oxide solid obtained in S3, dissolve it to neutrality under heating conditions, and filter to obtain a pure nickel cobalt sulfate salt solution.

[0011] Furthermore, the volume fraction of the dilute sulfuric acid solution in S4 is 40-50%.

[0012] Furthermore, a high manganese wire processing method specifically comprises the following steps: S1: Add 200-300g / L of dilute sulfuric acid solution to the leached residue, heat to 90-100°C, slowly add hydrogen peroxide and react for 1-2 hours to obtain a leaching solution containing a small amount of leached residue; S2: The leaching solution is heated to 60-90°C, and the calcined nickel-cobalt-manganese positive electrode material is added to neutralize it to neutrality. The filter residue obtained after filtration is returned to S1 for further leaching; S3: heating the neutralized solution obtained in S2 to 50-80°C, adding sodium hydroxide solution until the pH of the neutralized solution is 10-14, reacting for 1-2 hours, filtering, and washing the filter residue with water to obtain a nickel cobalt manganese hydroxide product; S4: The filtrate obtained in S3 is heated to 80-100° C., sodium carbonate is added to precipitate lithium, and industrial-grade lithium carbonate is obtained.

[0013] Furthermore, the volume fraction of hydrogen peroxide added to S1 is 7-10%.

[0014] Furthermore, the pH value of S2 after neutralization is 6-7.

[0015] Furthermore, the volume fraction of the sodium hydroxide solution in S3 is 20-30%.

[0016] Technical principle of the present invention: The processing method of the nickel cobalt lithium manganese oxide positive electrode material in the present invention is specifically divided into two processing methods of low manganese wire and high manganese wire for processing respectively.

[0017] After calcining, the nickel cobalt lithium manganese oxide positive electrode material is added with dilute sulfuric acid to leach out low manganese wire, and then oxalic acid solid is added for reaction and filtered to obtain nickel cobalt oxalate solid and nickel cobalt precipitation liquid, the nickel cobalt precipitation liquid is neutralized with calcium hydroxide, and then treated with activated carbon to remove impurities, and then sodium carbonate is added to precipitate lithium to obtain industrial-grade lithium carbonate; nickel cobalt oxalate solid is calcined to obtain nickel cobalt oxide solid, which is washed with water to remove impurities, and then dilute sulfuric acid solution is added to the nickel cobalt oxide solid, dissolved to neutrality under heating conditions, and filtered to obtain pure nickel cobalt sulfate salt solution.

[0018] The leached residue is oxidized and leached with hydrogen peroxide to form high manganese wire, a dilute sulfuric acid solution is added to the leached residue, and hydrogen peroxide is slowly added dropwise after heating to react, so as to obtain a leachate containing a small amount of leached residue, and the leachate is heated and then added with the calcined nickel-cobalt-manganese positive electrode material to neutralize to neutrality, and the filter residue obtained after filtration is further leached using the aforementioned method, and the obtained neutralized solution is heated and then sodium hydroxide solution is added to the neutralized solution until the pH value is 10-14, and the reaction is performed for 1-2 hours and then filtered, and the filter residue is washed with water to obtain a nickel-cobalt-manganese hydroxide product, and the filtrate obtained by filtration is heated and then sodium carbonate is added to precipitate lithium to obtain industrial-grade lithium carbonate.

[0019] In summary, the beneficial effects of the present invention compared with the prior art are as follows: the treatment method of the nickel cobalt manganese oxide positive electrode material in the present invention is specifically divided into two treatment methods of low manganese wire and high manganese wire for treatment respectively, and after treatment, a pure nickel cobalt sulfate salt solution, industrial-grade lithium carbonate, and nickel cobalt manganese hydroxide product can be obtained with a high yield, thereby achieving environmentally friendly production and improving the effect of resource recycling, and solving the problems of environmental pollution, low recovery rate, more waste of useful components in nickel cobalt manganese oxide batteries, and low resource utilization in the treatment method of the prior art; the lithium liquid finally obtained by the low manganese wire is neutralized with calcium hydroxide, thereby reducing the influence of sodium sulfate on the quality of lithium carbonate; the low manganese wire leach most of the nickel cobalt and a very small amount of manganese, thereby achieving the separation of nickel cobalt and manganese, thereby reducing the loss of nickel cobalt when manganese is directly removed from the nickel cobalt liquid; the remaining unleached nickel cobalt and manganese are treated with a high manganese wire to achieve full recycling of resources. DETAILED DESCRIPTION

[0020] All features disclosed in this specification, except mutually exclusive features and / or steps, can be combined in any manner.

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific embodiments.

[0022] Example 1 A method for processing a nickel-cobalt-manganese-oxide lithium positive electrode material comprises the following steps: (1) calcining the nickel-cobalt-manganese positive electrode material at 300° C. for a calcination residence time of 5 minutes to obtain a calcined nickel-cobalt-manganese positive electrode material; (2) preparing 200 g / L of dilute sulfuric acid solution, adding it to the nickel-cobalt-manganese positive electrode material calcined in step (1), heating to 90° C. and reacting for 2 hours, wherein the solid-liquid ratio of the nickel-cobalt-manganese positive electrode material to the dilute sulfuric acid solution is 100:1, and obtaining a low-manganese solution and leached residue; (3) The low manganese liquid is treated with a low manganese wire method, and the leached residue is treated with a high manganese wire method.

[0023] The low manganese wire treatment method specifically comprises the following steps: S1: Heat the low manganese solution to 60°C, slowly add oxalic acid solid, react for 1 hour, and filter to obtain nickel cobalt oxalate solid and nickel cobalt precipitation solution; S2: The nickel-cobalt precipitation liquid obtained in S1 is neutralized with calcium hydroxide, and then treated with activated carbon to remove impurities, and then sodium carbonate is added to precipitate lithium to obtain industrial-grade lithium carbonate; S3: The nickel cobalt oxalate solid obtained in S1 is calcined at 600° C. for 20 minutes to obtain nickel cobalt oxide solid, which is then washed with water to remove impurities.

[0024] S4: Add dilute sulfuric acid solution with a volume fraction of 40% to the nickel cobalt oxide solid obtained in S3, dissolve it to neutrality under heating conditions, and filter to obtain a pure nickel cobalt sulfate salt solution.

[0025] The high manganese wire treatment method specifically comprises the following steps: S1: Add 200g / L of dilute sulfuric acid solution to the leached residue, heat to 90°C, slowly drop hydrogen peroxide for 1 hour, the volume fraction of hydrogen peroxide is 7%, and obtain a leaching solution containing a small amount of leached residue; S2: The leaching solution is heated to 60°C, and the calcined nickel-cobalt-manganese positive electrode material is added to neutralize to neutrality. The pH value after neutralization is 6. The filter residue obtained after filtration is returned to S1 for further leaching; S3: The neutralized solution obtained in S2 is heated to 50° C., and a sodium hydroxide solution is added to the neutralized solution until the pH value is 10, and the volume fraction of the sodium hydroxide solution is 20%. After reacting for 1 hour, the solution is filtered, and the filter residue is washed with water to obtain a nickel-cobalt-manganese hydroxide product; S4: The filtrate obtained in S3 is heated to 80° C., and sodium carbonate is added to precipitate lithium to obtain industrial-grade lithium carbonate.

[0026] Example 2 A method for processing a nickel-cobalt-manganese-oxide lithium positive electrode material comprises the following steps: (1) calcining the nickel-cobalt-manganese positive electrode material at 600° C. for 10 minutes to obtain a calcined nickel-cobalt-manganese positive electrode material; (2) preparing a 250 g / L dilute sulfuric acid solution, adding the solution to the nickel-cobalt-manganese positive electrode material calcined in step (1), heating to 100° C., and reacting for 2 hours, wherein the solid-liquid ratio of the nickel-cobalt-manganese positive electrode material to the dilute sulfuric acid solution is 200:1, and obtaining a low-manganese solution and leached residue; (3) The low manganese liquid is treated with a low manganese wire method, and the leached residue is treated with a high manganese wire method.

[0027] The low manganese wire treatment method specifically comprises the following steps: S1: Heat the low manganese solution to 90°C, slowly add oxalic acid solid, react for 2 hours, and filter to obtain nickel cobalt oxalate solid and nickel cobalt precipitation liquid: S2: The nickel-cobalt precipitation liquid obtained in S1 is neutralized with calcium hydroxide, and then treated with activated carbon to remove impurities, and then sodium carbonate is added to precipitate lithium to obtain industrial-grade lithium carbonate; S3: The nickel cobalt oxalate solid obtained in S1 is calcined at 650°C for 40 minutes to obtain nickel cobalt oxide solid, which is then washed with water to remove impurities.

[0028] S4: Add dilute sulfuric acid solution with a volume fraction of 50% to the nickel cobalt oxide solid obtained in S3, dissolve it to neutrality under heating conditions, and filter to obtain a pure nickel cobalt sulfate salt solution.

[0029] The high manganese wire treatment method specifically comprises the following steps: S1: Add 300g / L of dilute sulfuric acid solution to the leached residue, heat to 100°C, slowly drop hydrogen peroxide for 2 hours, the volume fraction of hydrogen peroxide is 10%, and obtain a leaching solution containing a small amount of leached residue; S2: The leaching solution is heated to 90°C, and the calcined nickel-cobalt-manganese positive electrode material is added to neutralize to neutrality. The pH value after neutralization is 6-7. The filter residue obtained after filtration is returned to S1 for further leaching; S3: The neutralized solution obtained in S2 is heated to 80° C., and a sodium hydroxide solution is added to the neutralized solution until the pH value is 14, and the volume fraction of the sodium hydroxide solution is 30%. After reacting for 2 hours, the solution is filtered, and the filter residue is washed with water to obtain a nickel-cobalt-manganese hydroxide product; S4: The filtrate obtained in S3 is heated to 100° C., sodium carbonate is added to precipitate lithium, and industrial-grade lithium carbonate is obtained.

[0030] Example 3 A method for processing a nickel-cobalt-manganese-oxide lithium positive electrode material comprises the following steps: (1) calcining the nickel-cobalt-manganese positive electrode material at 400° C. for 7 minutes to obtain a calcined nickel-cobalt-manganese positive electrode material; (2) preparing 230 g / L of dilute sulfuric acid solution, adding it to the nickel-cobalt-manganese positive electrode material calcined in step (1), heating to 95° C. and reacting for 2 hours, wherein the solid-liquid ratio of the nickel-cobalt-manganese positive electrode material to the dilute sulfuric acid solution is 150:1, and obtaining a low-manganese solution and leached residue; (3) The low manganese liquid is treated with a low manganese wire method, and the leached residue is treated with a high manganese wire method.

[0031] The low manganese wire treatment method specifically comprises the following steps: S1: Heat the low manganese solution to 75°C, slowly add oxalic acid solid, react for 1.5 hours, and filter to obtain nickel cobalt oxalate solid and nickel cobalt precipitation solution; S2: The nickel-cobalt precipitation liquid obtained in S1 is neutralized with calcium hydroxide, and then treated with activated carbon to remove impurities, and then sodium carbonate is added to precipitate lithium to obtain industrial-grade lithium carbonate; S3: The nickel cobalt oxalate solid obtained in S1 is calcined at 625°C for 30 minutes to obtain nickel cobalt oxide solid, which is then washed with water to remove impurities.

[0032] S4: Add dilute sulfuric acid solution with a volume fraction of 45% to the nickel cobalt oxide solid obtained in S3, dissolve it to neutrality under heating conditions, and filter to obtain a pure nickel cobalt sulfate salt solution.

[0033] The high manganese wire treatment method specifically comprises the following steps: S1: Add 250g / L of dilute sulfuric acid solution to the leached residue, heat to 95°C, slowly drop hydrogen peroxide and react for 1.5 hours, with a volume fraction of hydrogen peroxide of 7-10%, to obtain a leaching solution containing a small amount of leached residue; S2: The leaching solution is heated to 70°C, and the calcined nickel-cobalt-manganese positive electrode material is added to neutralize to a neutral pH value of 6.5. The filter residue obtained after filtration is returned to S1 for further leaching; S3: The neutralized solution obtained in S2 is heated to 65° C., and a sodium hydroxide solution is added to the neutralized solution until the pH value is 12, and the volume fraction of the sodium hydroxide solution is 25%. After reacting for 1.5 hours, the solution is filtered, and the filter residue is washed with water to obtain a nickel-cobalt-manganese hydroxide product; S4: The filtrate obtained in S3 is heated to 90° C., and sodium carbonate is added to precipitate lithium to obtain industrial-grade lithium carbonate.

[0034] Example 4 A method for processing a nickel-cobalt-manganese-oxide lithium positive electrode material comprises the following steps: (1) calcining the nickel-cobalt-manganese positive electrode material at 500° C. for 8 minutes to obtain a calcined nickel-cobalt-manganese positive electrode material; (2) preparing 240 g / L dilute sulfuric acid solution, adding it to the nickel-cobalt-manganese positive electrode material calcined in step (1), heating to 97° C. and reacting for 2 hours, wherein the solid-liquid ratio of the nickel-cobalt-manganese positive electrode material to the dilute sulfuric acid solution is 180:1, and obtaining a low-manganese solution and leached residue; (3) The low manganese liquid is treated with a low manganese wire method, and the leached residue is treated with a high manganese wire method.

[0035] The low manganese wire treatment method specifically comprises the following steps: S1: Heat the low manganese solution to 80°C, slowly add oxalic acid solid, react for 1.5 hours, and filter to obtain nickel cobalt oxalate solid and nickel cobalt precipitation solution; S2: The nickel-cobalt precipitation liquid obtained in S1 is neutralized with calcium hydroxide, and then treated with activated carbon to remove impurities, and then sodium carbonate is added to precipitate lithium to obtain industrial-grade lithium carbonate; S3: The nickel cobalt oxalate solid obtained in S1 is calcined at 640°C for 35 minutes to obtain nickel cobalt oxide solid, which is then washed with water to remove impurities.

[0036] S4: Add dilute sulfuric acid solution with a volume fraction of 45% to the nickel cobalt oxide solid obtained in S3, dissolve it to neutrality under heating conditions, and filter to obtain a pure nickel cobalt sulfate salt solution.

[0037] The high manganese wire treatment method specifically comprises the following steps: S1: Add 280g / L of dilute sulfuric acid solution to the leached residue, heat to 98°C, slowly drop hydrogen peroxide and react for 1.8 hours, with a volume fraction of hydrogen peroxide of 7-10%, to obtain a leaching solution containing a small amount of leached residue; S2: The leaching solution is heated to 80°C, and the calcined nickel-cobalt-manganese positive electrode material is added to neutralize to neutrality. The pH value after neutralization is 6.8. The filter residue obtained after filtration is returned to S1 for further leaching; S3: The neutralized solution obtained in S2 is heated to 70° C., and a sodium hydroxide solution is added to the neutralized solution until the pH value is 13, and the volume fraction of the sodium hydroxide solution is 28%. After reacting for 1.7 hours, the solution is filtered, and the filter residue is washed with water to obtain a nickel-cobalt-manganese hydroxide product; S4: The filtrate obtained in S3 is heated to 90° C., and sodium carbonate is added to precipitate lithium to obtain industrial-grade lithium carbonate.

[0038] The technical principles of Examples 1-4 are: The method for processing the nickel cobalt lithium manganese oxide positive electrode material in the present invention is specifically divided into two processing methods: low manganese wire and high manganese wire, which are processed separately.

[0039] After calcining, the nickel cobalt lithium manganese oxide positive electrode material is added with dilute sulfuric acid to leach out low manganese wire, and then oxalic acid solid is added for reaction and filtered to obtain nickel cobalt oxalate solid and nickel cobalt precipitation liquid, the nickel cobalt precipitation liquid is neutralized with calcium hydroxide, and then treated with activated carbon to remove impurities, and then sodium carbonate is added to precipitate lithium to obtain industrial-grade lithium carbonate; nickel cobalt oxalate solid is calcined to obtain nickel cobalt oxide solid, which is washed with water to remove impurities, and then dilute sulfuric acid solution is added to the nickel cobalt oxide solid, dissolved to neutrality under heating conditions, and filtered to obtain pure nickel cobalt sulfate salt solution.

[0040] The leached residue is oxidized and leached with hydrogen peroxide to form high manganese wire, a dilute sulfuric acid solution is added to the leached residue, and hydrogen peroxide is slowly added dropwise after heating to react, so as to obtain a leachate containing a small amount of leached residue, and the leachate is heated and then added with the calcined nickel-cobalt-manganese positive electrode material to neutralize to neutrality, and the filter residue obtained after filtration is further leached using the aforementioned method, and the obtained neutralized solution is heated and then sodium hydroxide solution is added to the neutralized solution until the pH value is 10-14, and the reaction is performed for 1-2 hours and then filtered, and the filter residue is washed with water to obtain a nickel-cobalt-manganese hydroxide product, and the filtrate obtained by filtration is heated and then sodium carbonate is added to precipitate lithium to obtain industrial-grade lithium carbonate.

[0041] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A method for processing a nickel-cobalt-manganese-oxide lithium positive electrode material, characterized in that: The specific steps include: (1) calcining the nickel-cobalt-manganese positive electrode material at 300-600° C. to obtain a calcined nickel-cobalt-manganese positive electrode material; (2) preparing a dilute sulfuric acid solution, adding it to the nickel-cobalt-manganese positive electrode material calcined in step (1), heating it to 90-100° C., and reacting it for 2 hours to obtain a low-manganese solution and leached residue; (3) The low manganese liquid is treated with a low manganese wire method, and the leached residue is treated with a high manganese wire method.

2. The method for processing a nickel-cobalt-manganese-oxide lithium positive electrode material according to claim 1, characterized in that: The calcination residence time in step (1) is 5-10 minutes.

3. The method for processing a nickel-cobalt-manganese-oxide lithium positive electrode material according to claim 1, characterized in that: The concentration of dilute sulfuric acid in step (2) is 200-250 g / L.

4. The method for processing a lithium cobalt manganese oxide positive electrode material according to claim 1, characterized in that: In step (2), the solid-liquid ratio of the nickel-cobalt-manganese positive electrode material to the dilute sulfuric acid solution is (100-200):

1.

5. A low manganese wire processing method according to claim 1, characterized in that: The specific steps include: S1: Raise the temperature of the low manganese solution to 60-90°C, slowly add oxalic acid solid, react for 1-2 hours, and filter to obtain nickel cobalt oxalate solid and nickel cobalt precipitation solution; S2: The nickel-cobalt precipitation liquid obtained in S1 is neutralized with calcium hydroxide, and then treated with activated carbon to remove impurities, and then sodium carbonate is added to precipitate lithium to obtain industrial-grade lithium carbonate; S3: calcining the nickel cobalt oxalate solid obtained in S1 at 600-650° C. for 20-40 minutes to obtain nickel cobalt oxide solid, and then washing with water to remove impurities; S4: Add dilute sulfuric acid solution to the nickel cobalt oxide solid obtained in S3, dissolve it to neutrality under heating conditions, and filter to obtain a pure nickel cobalt sulfate salt solution.

6. The low manganese wire processing method according to claim 5, characterized in that: The volume fraction of the dilute sulfuric acid solution in S4 is 40-50%.

7. A high manganese wire processing method according to claim 1, characterized in that: The specific steps include: S1: Add 200-300g / L of dilute sulfuric acid solution to the leached residue, heat to 90-100°C, slowly add hydrogen peroxide and react for 1-2 hours to obtain a leaching solution containing a small amount of leached residue; S2: The leaching solution is heated to 60-90°C, and the calcined nickel-cobalt-manganese positive electrode material is added to neutralize it to neutrality. The filter residue obtained after filtration is returned to S1 for further leaching; S3: heating the neutralized solution obtained in S2 to 50-80°C, adding sodium hydroxide solution until the pH of the neutralized solution is 10-14, reacting for 1-2 hours, filtering, and washing the filter residue with water to obtain a nickel cobalt manganese hydroxide product; S4: The filtrate obtained in S3 is heated to 80-100° C., sodium carbonate is added to precipitate lithium, and industrial-grade lithium carbonate is obtained.

8. A high manganese wire processing method according to claim 7, characterized in that: The volume fraction of hydrogen peroxide added to S1 is 7-10%.

9. A high manganese wire processing method according to claim 7, characterized in that: The pH value of S2 after neutralization is 6-7.

10. A high manganese wire processing method according to claim 7, characterized in that: The volume fraction of the sodium hydroxide solution in S3 is 20-30%.