A method for recovering valuable metals from waste lithium ion batteries

A lithium-ion battery and valuable metal technology, which is applied in the field of lithium-ion battery waste recycling, can solve the problems of difficulty in industrialization, increase power consumption, increase leaching residue, etc., and achieve high added value of products, cost saving, and low consumption of raw materials. Effect

Active Publication Date: 2018-12-07
赣州寒锐新能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is not only long in process, high in cost, but also in poor working environment.
[0006] CN201510242788.1 discloses a method for leaching and recycling metals from lithium-ion battery positive electrode waste. This invention proposes a method for recycling lithium-ion battery positive electrode materials based on metal closed-loop circulation. Metal closed-loop circulation is about returning the leached slag to acid leaching process, this method needs to add a reducing agent, and the closed-loop cycle will increase power consumption on the one hand, and the leaching residue will gradually increase, making it difficult to realize industrialization

Method used

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  • A method for recovering valuable metals from waste lithium ion batteries

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Experimental program
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Effect test

Embodiment 1

[0043]Pretreatment: Weigh 100kg ternary lithium-ion battery waste, disassemble to obtain battery blocks and shells, use a shredder to cut the battery blocks to a size of 10mm*10mm, place them in a pyrolysis furnace for pyrolysis and distillation after cutting, and The distilled battery material is crushed to a particle size of about 80-100 mesh, and the crushed battery material enters a sieving machine and a sorting machine to obtain 55.61 kg of positive and negative electrode powder, 6.90 kg of copper foil, 9.5 kg of aluminum foil and 3.0 kg of plastic film. The recovery rate of nickel, cobalt, manganese and lithium in the pretreatment is about 96%, and the proportion of copper and aluminum entering the positive and negative electrode powder is about 1.5% and 5%. The content of each element before and after pretreatment is shown in Table 1.

[0044] Each element content (mass %) before and after the raw material pretreatment of table 1

[0045] element

[0046] Lea...

Embodiment 2

[0069] Pretreatment: Weigh 100kg monobasic lithium cobaltate battery waste, disassemble to obtain battery blocks and shells, use a shredder to cut the battery blocks to a size of 10mm*15mm, place them in a pyrolysis furnace for pyrolysis and distillation after cutting, and The distilled battery material is pulverized to a particle size of 100-200 mesh, and the pulverized battery material enters a sieving machine and a sorting machine to obtain 54.63 kg of positive and negative electrode powder, 6.85 kg of copper foil, 9.42 kg of aluminum foil and 2.95 kg of plastic film. The recovery rate of cobalt and lithium is about 98%, and the proportion of copper and aluminum entering the positive and negative electrode powders is about 2.2% and 5.80%. The content of each element before and after pretreatment is shown in Table 10.

[0070] Each element content (mass %) before and after table 10 raw material pretreatment

[0071] element

[0072] Leaching: Take 1kg of the posit...

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Abstract

The invention discloses a method for recovering valuable metals from waste lithium ion battery, which comprises the following steps: (1) pretreatment: separating positive and negative electrode powderfrom waste lithium ion battery; 2, leaching, and taking leach solution; 3) purification: adding alkali to that leach solution to adjust the pH value, and removing iron, aluminum and copper to obtainpurified solution; (4) Component control and evaporation concentration: adjusting the proportion of nickel, cobalt and manganese in the purified solution; then evaporating and concentrating, enrichingnickel, cobalt and manganese to set concentration to form precursor preparation liquid; 5) synthesis: passing the precursor preparation liquid, NaOH solution and ammonia water into a reaction kettle,controlling the pH value of the solution in the reaction kettle, carrying out reaction, and filtering after the reaction, wherein the filtered residue is the a ternary precursor. The leaching solution of the invention is purified, nickel cobalt manganese salt is supplemented, evaporated and concentrated, and the precipitant is added to directly synthesize the ternary precursor. The utility modelhas the advantages of short process flow, low consumption of raw materials, high recovery rate and high added value of products.

Description

technical field [0001] The invention belongs to the field of lithium ion battery waste recycling, and in particular relates to a method for recycling valuable metals in lithium ion batteries. Background technique [0002] Lithium-ion battery is a rechargeable battery with excellent comprehensive performance. It has the advantages of high working voltage, high specific energy, many cycle times, and small self-discharge. It is widely used in mobile communications, notebook computers, portable tools, electric vehicles, etc. . At present, the anode materials of lithium-ion batteries on the market are mainly lithium cobaltate, lithium iron phosphate, lithium nickel-cobalt manganese oxide, etc., all of which contain a large amount of valuable metals. Lithium-ion batteries contain toxic and flammable organic electrolytes. Recycling will cause serious harm to the environment. Recycling valuable metals in battery waste can realize the recycling and reuse of resources, which is of g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C22B7/00
CPCC22B7/007H01M10/54Y02P10/20Y02W30/84
Inventor 蔡世德谢致平苏中府曾清全
Owner 赣州寒锐新能源科技有限公司
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