Treatment method for waste of positive electrode material of lithium battery

A technology of cathode material and treatment method, which is applied in the field of waste battery material recycling, can solve the problem of lithium not being recycled, and achieve low production cost, simplified metal ion separation process, and good product quality

Inactive Publication Date: 2017-03-15
GANFENG LITHIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the lithium is not recovered

Method used

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  • Treatment method for waste of positive electrode material of lithium battery
  • Treatment method for waste of positive electrode material of lithium battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A Roasting: Roast the lithium battery anode material waste at 300°C for 4 hours;

[0062] B Acidizing leaching: Add 400kg of water to 100kg of roasted waste to adjust the slurry, then add 140kg of 98% (wt%) sulfuric acid to the slurry, and after the temperature is cooled to 40°C, slowly add 32kg of 50% sulfuric acid to the slurry (wt%) hydrogen peroxide, stirred and leached for 2h at 40°C, press-filtered to obtain 550L leached mother liquor, the composition of the leached mother liquor was as shown in Table 1 after determination:

[0063] Table 1 Chemical composition of leaching mother liquor

[0064] element Ni co mn Li Al Fe Cu Zn Ca Mg Contentg / L 49.5 29.8 27.8 11.2 2.3 1.7 1.0 1.0 1.3 1.2

[0065] C. Remove iron and aluminum: Add calcium carbonate to the leaching mother liquor obtained in step B to adjust the pH of the solution to 4.5, and obtain the iron and aluminum mother liquor through pressure filtration. The mea...

Embodiment 2

[0073] A Roasting: Roast the lithium battery anode material waste at 500°C for 1 hour;

[0074] B Acidizing leaching: Add 200kg of water to 100kg of roasted waste to adjust the slurry, then add 440kg of 31% (wt%) hydrochloric acid to the slurry, and then slowly add 32kg of 50% hydrochloric acid to the slurry after the temperature is cooled to 60°C (wt%) hydrogen peroxide, stirred and leached for 2h at 60°C, and press-filtered to obtain 700L leached mother liquor. The composition of the leached mother liquor was as shown in Table 2 after determination:

[0075] Table 2 Chemical composition of leachate

[0076] element Ni co mn Li Al Fe Cu Zn Ca Mg Contentg / L 25.2 41.1 18.4 8.8 0.8 0.7 0.5 0.8 0.8 0.5

[0077] C. Remove iron and aluminum: add calcium carbonate to the leaching mother liquor obtained in step B to adjust the pH of the solution to 5.0, and obtain the iron and aluminum mother liquor through pressure filtration. The mea...

Embodiment 3

[0085] A Roasting: Roast the lithium battery cathode material waste at 400°C for 3 hours;

[0086] B Acidizing leaching: Add 300kg of water to 100kg of roasted waste to adjust the slurry, then add 273.8kg of 65% (wt%) nitric acid to the slurry, and after the temperature is cooled to 50°C, slowly add 82.4kg of 50 % (wt%) hydrogen peroxide, stirred and leached for 2h at 50°C, press-filtered to obtain 600L leached mother liquor, and the ingredients of the leached mother liquor were determined in Table 3:

[0087] Table 3 Chemical composition of leachate

[0088] element Ni co mn Li Al Fe Cu Zn Ca Mg Contentg / L 30.5 47.6 21.3 9.3 0.9 0.6 1.5 1.2 1.3 0.8

[0089] C. remove iron and aluminum: the pH that adds calcium hydroxide to the leaching mother liquor that obtains in the step B and regulates solution is 6.0, obtains iron and aluminum mother liquor through pressure filtration, and Fe content is 0.0002g / L in the measured mother liq...

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Abstract

The invention discloses a treatment method for waste of a positive electrode material of a lithium battery. The method comprises the steps of (A) roasting; (B) acidifying and leaching; (C) iron and aluminum removal; (D) copper and zinc removal; (E) fluorinating lithium deposition; (F) calcium and magnesium removal; (G) multi-stage extraction; and (H) oil removal. According to the treatment method for the waste of the positive electrode material of the lithium battery, multiple valuable metals of lithium, cobalt, manganese, nickel and the like contained in the positive electrode material of the lithium battery can be comprehensively recovered; the treatment method has the advantages that the metal recovery rate is high, the obtained lithium product is good in quality and the treatment method is friendly to environment, low in production cost and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of recycling waste battery materials, in particular to a treatment method for lithium battery positive electrode material waste. Background technique [0002] Due to the advantages of high specific energy, long service life, high rated voltage, high power endurance, low self-discharge rate, light weight, and high and low temperature adaptability, lithium-ion batteries have become a popular choice for digital, communication, aviation, and portable electronic products. preferred power source. With its popularization and application in power vehicles and high-power energy storage facilities, its demand will grow explosively. In 2015, the global lithium-ion battery production reached 100.75GWh, of which small batteries accounted for 66.28%, power batteries accounted for 28.26%, and energy storage batteries accounted for 5.46%. In 2015, my country's lithium-ion battery production reached 47.13GWh, a year-on-yea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C22B7/00C22B26/12
CPCC22B7/007C22B26/12H01M10/54Y02P10/20Y02W30/84
Inventor 李良彬白有仙章小明谢绍忠高贵彦刘超彭爱平李芳芳刘明
Owner GANFENG LITHIUM CO LTD
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