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Method for preferentially extracting lithium and recycling valuable metals from waste ternary lithium ion battery positive electrode materials

A technology for lithium-ion batteries and positive electrode materials, which is applied in the field of resource recycling of waste batteries, can solve problems such as high cost of recycling lithium elements, low-quality lithium products, and complicated processes, and achieves low prices, strong hydrophobicity, and high-efficiency treatment processes. simple effect

Pending Publication Date: 2022-01-14
JINCHUAN GROUP LIMITED +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the technical problems of the traditional waste and old ternary lithium ion battery positive electrode material processing technology, such as complex process, not environmental protection, high cost of lithium element recovery and low quality of lithium products, to provide a kind of waste ternary lithium ion battery Battery

Method used

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  • Method for preferentially extracting lithium and recycling valuable metals from waste ternary lithium ion battery positive electrode materials
  • Method for preferentially extracting lithium and recycling valuable metals from waste ternary lithium ion battery positive electrode materials
  • Method for preferentially extracting lithium and recycling valuable metals from waste ternary lithium ion battery positive electrode materials

Examples

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Effect test

Embodiment 1

[0036] Weigh 50g of waste nickel-cobalt-manganese ternary lithium-ion battery positive electrode material, add 24mL of 60% concentrated sulfuric acid, mix well, the material is loose granular after mixing, put the material into the material boat and calcinate with a calciner, the calcining temperature is 400°C, Calcined for 3h, then cooled naturally. After the calcined material is taken out, 150mL of pure water is added for leaching at room temperature. During the leaching process, 5% sodium hydroxide solution is added to adjust the pH value of the leaching solution to 10.4. The leaching time is 1h. After leaching is completed, filter, and the filtrate and filter residue are sampled for detection. The filtrate is subjected to precipitation and ion exchange. After removing impurities, sodium carbonate is added to produce lithium carbonate product. After slurrying the filter residue at a solid-to-liquid ratio of 1:5, heat it to 60°C, add sulfuric acid solution to adjust the pH t...

Embodiment 2

[0038] Weigh 500g of waste nickel-cobalt-manganese ternary lithium-ion battery positive electrode material, add 145mL98% concentrated sulfuric acid, mix well, the material is loose granular after mixing, put the material into the material boat and use a calciner for calcination, the calcination temperature is 600°C, Calcined for 1h, then cooled naturally. After the calcined material is taken out, 2500mL of pure water is added for leaching at room temperature. During the leaching process, 10% sodium hydroxide solution is added to adjust the pH value of the leaching solution to 10, and the leaching time is 100 minutes. After removing impurities, sodium carbonate is added to produce lithium carbonate product. After the filter residue is slurried at a solid-to-liquid ratio of 1:3, heat to 60°C, add sulfuric acid solution to adjust the pH to 0.9, react for 15 minutes, add sulfuric acid and hydrogen peroxide in parallel, control the pH to about 1.0 during the process, react for 60 m...

Embodiment 3

[0040] Weigh 1000g of waste nickel-cobalt-manganese ternary lithium-ion battery positive electrode material, add 920mL of 30% concentrated sulfuric acid, mix well, after mixing well, the material is loose granular, put the material into the material boat and use a calciner for calcination, the calcination temperature is 500°C, Calcined for 4h, then cooled naturally. After the calcined material is taken out, 4000mL of pure water is added for leaching at room temperature. During the leaching process, 20% lithium hydroxide solution is added to adjust the pH value of the leaching solution to 10.5. The leaching time is 2 hours. After the leaching is completed, filter, and the filtrate and filter residue are sampled and tested. The filtrate is subjected to precipitation and ion exchange. After removing impurities, sodium carbonate is added to produce lithium carbonate product. After the filter residue is slurried at a solid-to-liquid ratio of 1:4, heat to 60°C, add sulfuric acid sol...

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Abstract

The invention discloses a method for preferentially extracting lithium and recycling valuable metals from waste ternary lithium ion battery positive electrode materials. The method comprises the following steps that the positive electrode material obtained by disassembling, crushing and separating the waste lithium ion battery is uniformly mixed with concentrated sulfuric acid, roasting is carried out at the temperature of between 400 and 600 DEG C, leaching is carried out a roasted product by using pure water and a dilute alkali solution, lithium-containing aqueous solution is obtained, and a Li<2>CO<3> or a lithium hydroxide product is prepared after impurity removal; and the valuable elements such as cobalt, nickel and manganese in water leaching residues are leached out through a reduction acid leaching method, and corresponding compound products are prepared after impurity removal, extraction and purification. The method is simple in process, short in flow, low in reagent cost and capable of efficiently recycling valuable metal elements such as lithium, cobalt, nickel and manganese in the waste ternary lithium ion battery material.

Description

technical field [0001] The invention belongs to the technical field of resource recycling of waste batteries, and relates to a treatment method for waste ternary lithium-ion batteries, in particular to a method for preferentially extracting lithium from positive electrode materials of waste ternary lithium-ion batteries to recover nickel, cobalt, manganese, etc. valence metal method. Background technique [0002] In the past 20 years, the lithium-ion battery industry chain has developed rapidly. With the arrival of the climax of decommissioned batteries, the shortage of resources and environmental problems caused by it are becoming more and more serious. Therefore, the development and application of economical and efficient waste lithium-ion battery recycling technology is imminent, and the reasonable recycling of valuable metals in waste lithium-ion batteries has important economic and environmental significance. [0003] At present, most domestic recycling of waste terna...

Claims

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Application Information

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IPC IPC(8): C22B7/00H01M10/54C22B26/12C22B1/06C22B23/00C22B47/00
CPCC22B7/007H01M10/54C22B26/12C22B1/06C22B7/002C22B23/043C22B47/00C22B7/008Y02P10/20Y02W30/84
Inventor 胡家彦柴艮风曹笃盟衣淑立马骞吴晖君陈天翼张振华吴芳何艳颉颐冯燕
Owner JINCHUAN GROUP LIMITED
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