Comprehensive recovery method for waste lithium ion battery

A technology for lithium-ion batteries and waste lithium batteries, applied in battery recycling, recycling by waste collectors, recycling technology, etc., can solve problems such as inability to achieve high-efficiency and priority extraction of lithium, and achieve harmless disposal and high-efficiency priority extraction of lithium , the effect of effective recycling

Active Publication Date: 2019-03-08
天齐锂业资源循环技术研发(江苏)有限公司
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AI Technical Summary

Problems solved by technology

[0006] Based on the technology disclosed in the existing patents, it is impossible to realize the process of efficiently and preferentially extracting lithium from waste lithium-ion batteries as raw materials, and simultaneously preparing nickel-cobalt-manganese sulfate products

Method used

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  • Comprehensive recovery method for waste lithium ion battery
  • Comprehensive recovery method for waste lithium ion battery
  • Comprehensive recovery method for waste lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Get ternary waste lithium battery powder 50g, add 4mol / L sulfuric acid, add 10g additive potassium permanganate (KMnO 4 ), at 20°C, stirred and reacted for 2 hours, then filtered to obtain a mixed solution containing nickel sulfate, cobalt sulfate, manganese sulfate and lithium sulfate and leaching residue in the filtrate. The leaching effect is as follows: figure 1 , 2 and 3. Adjust the pH of the filtrate to ≈5.5, remove impurities, and obtain a high-concentration lithium-containing solution. The lithium-containing solution is subjected to a lithium precipitation process using sodium carbonate to obtain a pure lithium carbonate product.

[0036]The leaching residue is reduced and leached with sulfuric acid and hydrogen peroxide, the sulfuric acid is 1.1 times the theoretical amount, and the hydrogen peroxide is 1.4 times the theoretical amount. Under the condition of 60°C, a high-concentration mixed solution containing nickel sulfate, cobalt sulfate and manganese sulf...

Embodiment 2

[0040] Take 50g of ternary waste lithium battery cell powder, add 4mol / L sulfuric acid, add 30g of additive KMnO 4 , under the condition of 50 ℃, after stirring and reacting for 4 hours, filter to obtain a solution containing nickel-cobalt-lithium and leaching residue, the leaching effect is shown in figure 1 , 2 And 3, adjust the filtrate pH ≈ 5-5.5, remove impurities, obtain a high-concentration lithium-containing solution, and then use sodium carbonate to perform a lithium-precipitation process on the lithium-containing solution to obtain a lithium carbonate product.

[0041] The leaching residue is reduced and leached with sulfuric acid and hydrogen peroxide. The sulfuric acid is 1.05 times the theoretical amount, and the hydrogen peroxide is 1.3 times the theoretical amount. At 60°C, a high-concentration lithium-containing solution is obtained, wherein nickel: 61.75g / L, cobalt: 23.75g / L, manganese: 35.15g / L. Adjust the pH of the lithium-containing solution to ≈4.5, and...

Embodiment 3

[0045] Take 50g of ternary waste lithium battery cell powder, add 4mol / L sulfuric acid, add additive KMnO 4 40g, under the condition of 80 ℃, after stirring and reacting for 12h, filter to obtain a solution containing nickel lithium manganese (leaching effect see figure 1 , 2 , 3), adjust the filtrate pH ≈ 5-5.5, remove impurities, obtain a high-concentration lithium-containing solution, and then perform a lithium precipitation process to obtain a lithium carbonate product

[0046] The leaching residue is reduced and leached with sulfuric acid and hydrogen peroxide. The sulfuric acid is 0.95 times of the theoretical amount, and the hydrogen peroxide is 1.1 times of the theoretical amount. At 60°C, a high-concentration nickel-cobalt-manganese-containing solution is obtained, nickel: 55.25g / L, cobalt: 21.25g / L, manganese: 31.45g / L, adjust the pH of the solution to ≈4.5, and use 25% P204 to extract and remove impurities after nickel soap. The extraction stage is 12 to remove co...

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Abstract

The invention provides a comprehensive recovery method for a waste lithium ion battery. The method comprises the following steps: three-element waste lithium battery cell powder is leached by sulfuricacid and potassium permanganate for the first time so as to obtain a first leaching solution and a first leaching residue; sodium carbonate is used for carrying out lithium precipitation on the firstleaching solution to obtain lithium carbonate; selective reduction leaching is carried out on the first leaching residue by using hydrogen peroxide and sulfuric acid so as to obtain a second leachingsolution and a second leaching residue; the pH value of the second leaching solution is adjusted to be 4.2-4.5, and P204 is used for extracting the second leaching solution so as to obtain a P204 raffinate and a P204 loaded organic phase; reverse extraction is carried out on the P204 loaded organic phase by using sulfuric acid, and evaporating and crystallizing are carried out to prepare manganese sulfate; the pH value of the P204 raffinate is adjusted to be 4.5-5, and the P204 raffinate is extracted by using C272 so as to obtain a C272 extracting solution and a C272 loaded organic phase; reverse extraction is carried out on a C727 loaded organic phase by sulfuric acid to obtain a cobalt sulfate solution, and evaporating and crystallizing are carried out to prepare battery-grade cobalt sulfate; and the pH value of a C272 raffinate is adjusted to be 5-5.5, the C272 extracting solution is extracted by using P507 to obtain a P507 loaded organic phase, sulfuric acid back-extraction is carried out on the P507 loaded organic phase to obtain a nickel sulfate solution, and evaporating and crystallizing are carried out to obtain nickel sulfate.

Description

technical field [0001] The invention belongs to a comprehensive recovery method of waste lithium ion batteries, and more specifically relates to a comprehensive recovery method of waste lithium ion batteries. Background technique [0002] Cobalt sulfate is mainly used in lithium batteries, and is also used in electroplating, ceramic glazes and paint drier, production of cobalt-containing pigments, catalysts, analytical reagents, feed additives, tire adhesives and other cobalt products; nickel sulfate is mainly used in lithium batteries , electroplating and catalyst industries; lithium carbonate is mainly used in lithium batteries, but also in the preparation of catalysts for chemical reactions, semiconductors, ceramics, television, medicine and atomic energy industries. [0003] In recent years, with the support of national policies, the new energy industry has developed rapidly, but more and more waste lithium-ion batteries will be scrapped. Waste lithium-ion batteries cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C22B7/00C22B26/12C22B23/00C22B47/00
CPCC22B7/007C22B23/043C22B26/12C22B47/00C22B3/3842C22B3/3844H01M10/54Y02W30/84Y02P10/20
Inventor 高洁王光辉肇巍王梦王蒙蒙谢宇充徐燕何霞
Owner 天齐锂业资源循环技术研发(江苏)有限公司
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