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Recycling method for valuable metal from waste nickel-cobalt-manganese lithium ion battery

A nickel-cobalt-manganese-lithium, ion battery technology is applied in the wet recycling of lithium valuable metals, cobalt, manganese, and nickel in waste nickel-cobalt-manganese lithium-ion batteries, and can solve the problems of high energy consumption and complicated operation, etc. To achieve the effect of simple equipment, simple operation and industrialized production

Inactive Publication Date: 2018-02-02
JINCHUAN GROUP LIMITED +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to propose a method for recovering valuable metals in waste nickel-cobalt-manganese lithium-ion batteries, which overcomes the shortcomings of existing waste nickel-cobalt-manganese lithium-ion battery recovery methods with high energy consumption and complicated operation.

Method used

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  • Recycling method for valuable metal from waste nickel-cobalt-manganese lithium ion battery
  • Recycling method for valuable metal from waste nickel-cobalt-manganese lithium ion battery
  • Recycling method for valuable metal from waste nickel-cobalt-manganese lithium ion battery

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Embodiment 1

[0032] Collect waste lithium-ion batteries of lithium cobaltate, lithium manganate, and nickel-cobalt lithium manganate, disassemble them manually, discharge them in 5% sodium chloride solution, and crush them mechanically. Weigh 1500 g of anhydrous sodium sulfite and dissolve it for later use. Add 15L of 1.8mol / L sulfuric acid into the reactor and heat it to 50~65°C, weigh 5kg of the crushed waste lithium-ion battery and add it, stir at a low speed, measure a certain amount of 30~98% concentrated sulfuric acid to adjust the pH value of the solution 1.0 or so, add sodium sulfite solution dropwise after 10 minutes, react for 30~100 minutes after the dropwise addition, and filter. Heat the filtrate to 80~90°C, stop heating, add 250g / L sodium hydroxide solution to adjust the pH value of the solution to 2.0, add 10g of reduced iron powder, react for 15min, add 100mL of 30% hydrogen peroxide, react for about 20min, then add lye to adjust the solution The pH value is about 4.0, rea...

Embodiment 2

[0035] Collect waste lithium-ion batteries of lithium cobaltate, lithium manganate, and nickel-cobalt lithium manganate, disassemble them manually, discharge the batteries in 5% sodium chloride solution, and crush them mechanically. Add 15L of 2mol / L sulfuric acid to the reactor, raise the temperature to 50~65°C, weigh 5kg of the crushed waste lithium-ion battery and add it into it, soak for 10min, stir at a low speed, measure a certain amount of 98% concentrated sulfuric acid, and slowly add it to the reaction vessel , adjust the pH value of the solution to about 1.0, add 2.5L of 30% hydrogen peroxide, react for 30-100min after the dropwise addition, and filter. The filter residue was washed and dried, then ground, and passed through a 100-mesh sieve to obtain copper, aluminum foil and graphite powder. Heat the filtrate to 85°C, add 250g / L sodium hydroxide solution to adjust the pH value of the solution to 1.8, add 12g of reduced iron powder, react for 15min, add 30% hydrogen...

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Abstract

The invention relates to a method for recycling valuable metal from a waste nickel-cobalt-manganese lithium ion battery. The method comprises the following steps of: dismounting, discharging and crushing the battery, soaking crushed waste nickel-cobalt-manganese lithium ions into sulfuric acid with certain concentration, adding a reducing agent to strip positive and negative pole pieces, and leaching valuable metals of nickel, cobalt, manganese and lithium; and replacing leach liquor with iron powder to remove copper, carrying out hydrolyzing to remove iron and aluminum, and dosing an impurity-removed solution to synthesize an aluminum coated nickel, cobalt and manganese ternary positive electrode material precursor, evaporating and concentrating the synthesized solution, adding carbonateor introducing carbon dioxide to recycle lithium. According to the method disclosed by the invention, stripping and leaching are synchronously completed, chemical precipitation is performed to removecopper, iron and aluminum, slag amount is small, slag filter performances are good, and the impurity-removed solution is used for synthesizing the aluminum coated nickel, cobalt and manganese ternaryprecursor, so that the recovery rate of valuable metal is increased; and the recovery rate for nickel, cobalt and manganese is 96% or higher in the whole process, the total recovery rate of lithium is90% or higher, the technological process is short, operation is simple, equipment is less, and the cost is low.

Description

technical field [0001] The invention belongs to the field of waste battery recycling and relates to a method for wet recycling of nickel, cobalt, manganese and lithium valuable metals in waste nickel-cobalt-manganese lithium ion batteries. Background technique [0002] Lithium-ion batteries are currently the chemical batteries with the best rechargeable performance that have been industrialized in the world. In recent years, there are hundreds of millions of lithium-ion batteries produced every year, and the annual growth rate is more than 20%. According to the life of lithium-ion batteries, the peak period of lithium-ion battery scrapping is coming soon. The content of nickel, cobalt, manganese, lithium and other metals contained in lithium-ion batteries is much higher than the grade of natural primary ore, and the cost of recycling is much lower than the cost of raw ore treatment. Recycling waste lithium-ion batteries also reduces environmental pollution, which has conside...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C22B47/00C22B26/12C22B15/00C22B21/00H01M10/54
CPCC22B7/007C22B15/0071C22B21/0023C22B23/043C22B26/12C22B47/00H01M10/54Y02P10/20Y02W30/84
Inventor 常全忠张树峰柴艮风王甲琴李兰兰甘梅陈天翼常雪洁王红忠高小琴朱纪念
Owner JINCHUAN GROUP LIMITED
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