Method for recycling lithium in waste power lithium battery

A technology for used batteries and lithium batteries, applied in lithium batteries, battery recycling, recycling technology and other directions, can solve the problems of difficult to achieve industrial application, long treatment process, affecting lithium yield, etc., to achieve efficient recovery and reuse, improve The leaching rate, the effect of a wide range of trials

Active Publication Date: 2021-03-30
JINCHUAN GROUP LIMITED +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the steps of grinding and organic acid leaching are used step by step for the calcined positive electrode material, which has a long treatment process, which affects the yield of lithium, and the method of organic acid leaching is relatively expensive, and it is difficult to realize large-scale production. Industrial application

Method used

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  • Method for recycling lithium in waste power lithium battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Pretreatment steps of waste power lithium batteries (nickel-cobalt-manganese ternary lithium batteries, nickel-cobalt-aluminum lithium batteries, and cobalt-oxide lithium batteries) pretreatment steps: put 20kg of waste power lithium batteries in an inert gas (nitrogen) protection , Dismantling in a closed state, primary shredding, secondary crushing, multi-stage sorting, and screening to obtain waste battery powder, the particle size of the battery powder is 8 μm.

[0029] (2) The step of high-temperature calcination of battery powder: add 50 g of carbon powder to 50 g of waste power battery powder obtained by sorting, mix and put it into a box-type resistance furnace for high-temperature calcination. The calcination temperature is 260°C, and the holding time is 120 minutes. After calcination, the temperature is naturally lowered, and it is ready for use.

[0030] (3) The steps of mechanical activation and water immersion of battery powder: add 100g of zirconia act...

Embodiment 2

[0033] (1) Pretreatment steps of waste power lithium battery (nickel-cobalt-manganese ternary lithium battery): 50kg of waste power lithium battery is disassembled under the protection of inert gas (argon) and sealed, first-level shredding, second-level Crushing, multi-stage sorting, and sieving to obtain waste battery powder, the particle size of the battery powder is 18 μm.

[0034] (2) The step of high-temperature calcination of battery powder: add 150 g of graphite to 100 g of waste power lithium-ion battery powder obtained by sorting, mix and put it into a box-type resistance furnace for high-temperature calcination. The calcination temperature is 420°C, the holding time is 60min, the temperature is naturally lowered after calcination, and it is ready for use.

[0035] (3) The steps of mechanical activation and water immersion of battery powder: add 100g of zirconia activator to 100g of battery powder after calcining, the particle size of zirconia activator is 20mm, add 1...

Embodiment 3

[0038] (1) Pretreatment steps of waste power lithium batteries (several hybrid batteries of nickel-cobalt-manganese ternary lithium batteries, lithium manganese oxide batteries, and lithium iron phosphate batteries): Put 100kg of waste power lithium batteries in an inert gas carbon dioxide protection and sealed state dismantling, primary shredding, secondary crushing, multi-stage sorting, and screening to obtain waste battery powder with a particle size of 28 μm.

[0039] (2) The step of high-temperature calcination of battery powder: add 150 g of carbon powder to the 75 g of waste power lithium-ion battery powder obtained by sorting, mix and put it into a box-type resistance furnace for high-temperature calcination. The calcination temperature is 580°C, the holding time: 30min, and the temperature is naturally lowered after calcination, and it is ready for use.

[0040](3) The steps of mechanical activation and water immersion of battery powder: add 75g of zirconia activator ...

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Abstract

The invention discloses a method for recycling lithium in a waste power lithium battery. The method comprises the following steps of pretreatment: specifically disassembling, crushing and sorting thewaste power lithium battery under the protection of inert gas in a closed state to obtain waste battery powder; high-temperature calcination: specifically adding additives to the waste battery powderfor high-temperature calcination; mechanical activation and water leaching: specifically adding activating agents to the waste battery powder subjected to high-temperature calcination, and carrying out mechanical activation, water leaching and solid-liquid separation to obtain lithium-containing leachate; and evaporative crystallization: specifically carrying out evaporative crystallization on theobtained lithium-containing leachate to obtain a lithium hydroxide product. By adopting the method, the yield of the metal lithium in the whole treatment process reaches 90% or above.

Description

technical field [0001] The invention relates to the technical field of recycling waste batteries, in particular to a method for recycling lithium in waste power lithium batteries. Background technique [0002] With the rapid development of new energy vehicles, the future will bring a large scale of decommissioned power batteries. It is estimated that by 2020, the amount of scrapped power lithium batteries will reach 25Gwh, about 200,000 tons. In 2023, the amount of scrap will reach 101Gwh, about 800,000 tons. It is predicted that by 2020, the overall battery recycling market will reach 11.1 billion yuan, of which cascade utilization is 6.9 billion yuan, and recycling is 4.2 billion yuan. By 2023, the entire market size will reach 15 billion yuan. After a large number of power batteries are decommissioned, without proper disposal and maximum value utilization, it will threaten public safety, cause irreversible environmental pollution, and waste precious valuable metal resou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B26/12C22B7/00H01M10/052H01M10/54
CPCC22B26/12C22B7/001C22B7/006H01M10/54H01M10/052Y02W30/84Y02P10/20Y02E60/10
Inventor 李兰兰曹笃盟王甲琴陈天翼汤波张明兰柴艮风吴晖君吴芳
Owner JINCHUAN GROUP LIMITED
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