Comprehensive treatment method of waste lithium iron phosphate battery

A lithium iron phosphate battery, comprehensive treatment technology, applied in the direction of phosphate, phosphorus oxyacids, phosphorus compounds, etc., can solve the problems of acid consumption, leaching liquid containing impurities and high-salt wastewater, etc., achieve high recovery rate, solve resource recovery Exploitation problem, cheap effect

Active Publication Date: 2019-06-21
深圳市泰力废旧电池回收技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method consumes a large amount of acid solution, and is accompanied by the problems of impurity in the leachate and generation of a large amount of high-salt wastewater

Method used

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  • Comprehensive treatment method of waste lithium iron phosphate battery
  • Comprehensive treatment method of waste lithium iron phosphate battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] see figure 1 , the present invention provides a technical solution: a comprehensive treatment method for waste lithium iron phosphate batteries, comprising the following steps:

[0029] S1: Manual dismantling, after manually tearing the packaging paper of the waste lithium iron phosphate battery, cut the shell of the waste lithium iron phosphate battery, and after separation, the battery shell, internal components and separator paper are obtained;

[0030] S2: dry pyrolysis, transfer the internal components to the heating furnace and pass through the N 2 Protection, control the heating temperature to 600 °C, and continue heating for 1.5 hours to obtain aluminum and copper scrap metal, graphite negative electrode and pyrolysis products;

[0031] S3: Breaking and separating, transferring the pyrolysis product to a fine jaw crusher, and obtaining iron-lithium powder after complete crushing;

[0032] S4: heat treatment, transfer the iron-lithium powder to a natural gas co...

Embodiment 2

[0040] see figure 1 , the present invention provides a technical solution: a comprehensive treatment method for waste lithium iron phosphate batteries, comprising the following steps:

[0041] S1: Manual dismantling, after manually tearing the packaging paper of the waste lithium iron phosphate battery, cut the shell of the waste lithium iron phosphate battery, and after separation, the battery shell, internal components and separator paper are obtained;

[0042] S2: dry pyrolysis, transfer the internal components to the heating furnace and pass through the N 2 protection, control the heating temperature to 700 °C, and continue heating for 2.0 h to obtain aluminum and copper scrap metals, graphite negative electrodes and pyrolysis products;

[0043] S3: Breaking and separating, transferring the pyrolysis product to a fine jaw crusher, and obtaining iron-lithium powder after complete crushing;

[0044] S4: heat treatment, transfer the iron-lithium powder to a natural gas comb...

Embodiment 3

[0052] see figure 1 , the present invention provides a technical solution: a comprehensive treatment method for waste lithium iron phosphate batteries, comprising the following steps:

[0053] S1: Manual dismantling, after manually tearing the packaging paper of the waste lithium iron phosphate battery, cut the shell of the waste lithium iron phosphate battery, and after separation, the battery shell, internal components and separator paper are obtained;

[0054] S2: dry pyrolysis, transfer the internal components to the heating furnace and pass through the N 2 protection, control the heating temperature to 800 °C, and continue heating for 2.5 h to obtain aluminum and copper scrap metals, graphite negative electrodes and pyrolysis products;

[0055] S3: Breaking and separating, transferring the pyrolysis product to a fine jaw crusher, and obtaining iron-lithium powder after complete crushing;

[0056] S4: heat treatment, transfer the iron-lithium powder to a natural gas comb...

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Abstract

The invention discloses a comprehensive treatment method of a waste lithium iron phosphate battery. The comprehensive treatment method comprises the following steps: step S1, manual disassembly; stepS2, drying and pyrolysis; step S3, crushing and separating; step S4, heat treatment; step S5, acid leaching; step S6, filter pressing and washing; step S7, transformation; step S8, alkalization and impurity removal; and step S9, preparation of magnesium chloride. The invention provides a brand new method, which focuses on recovering lithium elements in the waste lithium iron phosphate battery to obtain terminal product lithium chloride purification liquid; the lithium element recovery rate is high, the problem of recycling of the waste lithium iron phosphate battery resources is solved, the comprehensive treatment method is environment-friendly, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of lithium iron phosphate batteries, in particular to a comprehensive treatment method for waste lithium iron phosphate batteries. Background technique [0002] Lithium iron phosphate battery refers to a lithium ion battery that uses lithium iron phosphate as the positive electrode material. Because its performance is particularly suitable for power applications, the word "power" is added to the name, that is, lithium iron phosphate power battery. It is widely used in large electric vehicles, light electric vehicles, energy storage equipment for solar and wind power generation, etc. Correspondingly, the comprehensive recovery of waste lithium iron phosphate batteries has also attracted more and more attention. [0003] The Chinese invention patent with the application number: CN200710129898.2 discloses a method for recovering lithium iron phosphate cathode material from lithium-ion battery waste, which inclu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/54C22B26/12C22B7/00C01F5/30C01B25/45C01B25/37C01B25/26
CPCY02W30/84Y02P10/20Y02E60/10
Inventor 万艳鹏张永祥肖晓华
Owner 深圳市泰力废旧电池回收技术有限公司
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