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Method for separating lithium cobaltate and graphite in waste electrode material

An electrode material, lithium cobalt oxide technology, applied in the field of lithium cobalt oxide and graphite, can solve the problems of lithium cobalt oxide and graphite that have not yet been seen, and achieve the effect of low recycling cost, simple process flow, and increased surface area

Active Publication Date: 2019-05-03
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] After searching, the applicant found that there is no relevant report on the method of strengthening flotation to separate lithium cobaltate and graphite in waste lithium-ion batteries by grinding ore and adding chemicals.

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  • Method for separating lithium cobaltate and graphite in waste electrode material
  • Method for separating lithium cobaltate and graphite in waste electrode material

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] like figure 1 Shown is the method for strengthening flotation separation of lithium cobaltate and graphite in waste lithium-ion batteries by means of grinding and dosing, comprising the following steps:

[0024] (1) Discharge the waste lithium-ion battery, air dry it naturally for 24 hours, and manually disassemble it into positive electrode sheet, negative electrode sheet, separator and casing. Put the positive and negative plates together in a universal pulverizer to crush, and after sieving, obtain the under-sieve material with a particle size of less than 0.075mm;

[0025] (2) Mix the collector n-dodecane and ethanol evenly in advance according to a certain proportion, the mixing ratio is 1:n (n=1, 2, 3, 4, 5), and place the prepared mixed agent in the fine In the mouth bottle, prevent volatilization;

[0026] (3) Take 4g of the under-sieve material and p...

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Abstract

The invention discloses a method for separating lithium cobaltate and graphite in a waste electrode material. The method comprises the following steps: discharging a waste lithium ion battery, naturally air-drying the battery for 24 hours, manually disassembling and separating positive and negative plates, a diaphragm and a shell, crushing and screening the positive and negative plates to obtain an undersize material; uniformly mixing a collecting agent n-dodecane and ethyl alcohol in advance according to a certain proportion, and adding a certain amount of the mixed agent and the undersize material into ore grinding equipment together to obtain an ore grinding product; conducting flotation on the ore grinding product, wherein the floating matter is graphite tailings and the sediment is lithium cobaltate concentrate; after an obtained flotation product is filtered, dried and roasted, calculating the grade of lithium cobaltate; subjecting one part of the ore grinding product to direct ore-grinding (without adding chemicals) and flotation, and calculating the grade of lithium cobalt oxides for comparison. Compared with direct ore-grinding and flotation, the grade of lithium cobalt oxide concentrates separated in the ore-grinding and dosing-flotation mode is obviously higher than that of the lithium cobaltate concentrate separated in the direct ore-grinding and flotation mode. Theprocess of flotation separation and recovery of the lithium cobalt oxide is enhanced.

Description

technical field [0001] The invention belongs to the field of resource recovery and utilization of waste lithium ion batteries, and in particular relates to a method for strengthening flotation and separating lithium cobaltate and graphite in waste lithium ion batteries by grinding ore and adding chemicals. Background technique [0002] With the rapid development of industry and the improvement of people's living standards, the problems of environmental pollution and resource shortage caused by global fossil energy consumption have become increasingly prominent. As the main energy situation in today's society, electric energy has great potential for development. As an efficient and environmentally friendly electric energy carrier, lithium-ion batteries have high energy density, long cycle life, light weight, low self-discharge rate, no memory effect, With many advantages such as green and environmental protection, it is widely used in the fields of electronic equipment and ne...

Claims

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Application Information

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IPC IPC(8): H01M10/54B02C21/00B03D1/00
CPCY02W30/84
Inventor 何亚群杜中兴屈莉莉余嘉栋谢卫宁
Owner CHINA UNIV OF MINING & TECH
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