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Method for recycling valuable metal in lithium ion battery

A lithium-ion battery and ion battery technology, applied in battery recycling, recycling technology, waste collector recycling, etc., can solve the problems of reducing recycling costs, inability to make full use of battery raw material recycling operations, etc., and achieve fast acquisition and metal recovery rate High, high-purity effect

Active Publication Date: 2020-12-22
天齐锂业(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This document uses aluminothermic reduction to obtain cobalt oxide, manganese oxide, nickel oxide and lithium aluminate. The reaction environment is protected by an argon atmosphere, and the final product is a divalent metal oxide. In addition, this method still uses the positive electrode as the raw material. The negative electrode in the battery needs to be removed, and the battery raw materials cannot be fully utilized for recycling operations, reducing recycling costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Manually disassemble the nickel-cobalt-manganese ternary lithium-ion battery and remove the outer iron shell. Crush the inner core of the battery, remove the iron shell and diaphragm by magnetic separation and winnowing, and sieve to obtain positive and negative electrode powders with a particle size of ≤2mm. Get 5kg mixture powder and transfer in the reaction furnace, mix in magnesium powder, potassium chlorate as igniter. The magnesium powder is ignited, and the system starts a self-propagating reaction. After the reaction is stable, the oxygen-depleted gas N is introduced from the bottom of the reactor. 2 (Oxygen 5%), 400mL / min; Slowly feed oxygen-enriched gas (oxygen volume fraction 100%) into the reaction system from the top of the reaction furnace, 500mL / min, the time is 3min. Remove a small amount of slag from the upper part of the melt, and cool the lower part of the liquid to obtain a metal mixture. Using ICP (Inductively Coupled Plasma Spectrometer) to meas...

Embodiment 2

[0053] Manually disassemble the nickel-cobalt-aluminum ternary lithium-ion battery and remove the outer iron shell. Crush the inner core of the battery, remove the iron shell and diaphragm by magnetic separation and winnowing, and sieve to obtain positive and negative electrode powders with a particle size of ≤2mm. Get 8kg mixture powder and transfer in the reaction furnace, mix in magnesium powder, potassium chlorate as igniter. The magnesium powder is ignited, and the system starts a self-propagating reaction. After the reaction is stable, feed oxygen-depleted gas Ar (99.9%) from the bottom of the reactor at 300mL / min; slowly feed oxygen-enriched gas (oxygen volume fraction 95%) into the reaction system from the top of the reactor at 400mL / min, The time is 3 minutes. Remove a small amount of slag from the upper part of the melt, and cool the lower part of the liquid to obtain a metal mixture. Using ICP (inductively coupled plasma spectrometer) to measure the content of me...

Embodiment 3

[0055] Manually disassemble the lithium cobalt oxide lithium-ion battery and remove the outer iron shell. Crush the inner core of the battery, remove the iron shell and diaphragm by magnetic separation and winnowing, and sieve to obtain positive and negative electrode powders with a particle size of ≤2mm. Get 10kg mixture powder and transfer in the reaction furnace, mix into ethanol, potassium chlorate as igniter. The ethanol is ignited, and the system starts a self-propagating reaction. After the reaction is stable, the oxygen-depleted gas CO is introduced from the bottom of the reactor. 2 (Oxygen 10%), 500mL / min; Slowly feed oxygen-enriched gas (oxygen volume fraction 95%) into the reaction system from the top of the reaction furnace, 600mL / min, the time is 3min. Remove a small amount of slag from the upper part of the melt, and cool the lower part of the liquid to obtain a metal mixture. Using ICP (inductively coupled plasma spectrometer) to measure the content of metal ...

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Abstract

The invention relates to a method for recycling valuable metal in a lithium ion battery, and belongs to the technical field of battery recycling. The method for recycling the valuable metal in the lithium ion battery is low in cost. The method comprises the following steps: disassembling the lithium ion battery, removing a shell, and smashing an inner core to obtain cathode and anode powder; adding an ignition agent into the cathode and anode powder, igniting the ignition agent to initiate a reaction, after the reaction is stable, introducing oxygen-enriched gas and oxygen-deficient gas, afterthe reaction continues to be completed, removing upper slag, and cooling lower liquid to obtain a metal mixture. According to the method, only the battery shell and a diaphragm need to be removed, raw materials are obtained rapidly, the cathode and anode powder does not need to be separated, the raw materials in the lithium ion battery are fully utilized for the reaction, a reducing agent and a heat source do not need to be additionally added, and the reaction is simple and rapid. The metal mixture obtained after the reaction is high in purity, and the content of acid-insoluble impurities islower than 1%.

Description

technical field [0001] The invention relates to a method for recovering valuable metals in lithium ion batteries, belonging to the technical field of battery recovery. Background technique [0002] In recent years, with the rapid growth of the application of lithium-ion batteries in electric vehicles, 3C digital products and other fields, the overall production and market size of lithium-ion batteries in the world have rapidly increased. In 2015, the overall global output of lithium-ion batteries reached 100.75GWh, a year-on-year increase of 39.45%. From 2005 to 2015, the global lithium battery market size increased from US$5.6 billion to US$22.1 billion, with a compound annual growth rate of 14.7%; it is expected that the global lithium battery market will reach US$36.3 billion in 2020 and will continue to maintain a relatively high level . [0003] Focusing on lithium iron phosphate and ternary lithium batteries, according to the calculation of the scrapping period of li...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B1/00C22B23/02C22B47/00C22B15/00C22B26/12C01D15/02H01M10/54
CPCC22B7/001C22B1/005C22B23/02C22B47/00C22B15/0052C22B26/12C22B7/007C22B23/0415C22B15/0067C01D15/02H01M10/54Y02W30/84
Inventor 胡曦肇巍赵莉周复李超徐川刘刚锋
Owner 天齐锂业(江苏)有限公司
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