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Method of recovering manganese from lithium ion battery cathode waste material containing manganese elements

A lithium-ion battery and scrap technology, applied in the field of manganese recycling, can solve the problems of low product added value, long recycling process, high recycling cost, etc., and achieve the effect of low equipment anti-corrosion requirements, high added value, and low cost

Active Publication Date: 2020-02-14
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of long recycling process, high recycling cost, low added value of products obtained from recycling manganese, and high-concentration saline wastewater generated during the recycling process, the present invention provides a method for recycling manganese from positive electrode waste of lithium-ion batteries. Method for recovering manganese from manganese-containing lithium-ion battery cathode waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]Discharge, disassemble, crush, sort, sieve, and flotation separate the positive and negative electrode mixtures from the collected scrap lithium-ion batteries that use lithium manganate as the positive electrode material to obtain waste lithium manganate; Lithium and the additive potassium hydroxide are fully mixed at a mass ratio of 1:0.5 to form a mixture, and the mixture is calcined at 240°C for 8 hours in an air atmosphere; The potassium oxide solution is leached, and the leaching time is 10 minutes. After the leaching treatment, it is filtered. After washing, the filter residue can be used as a raw material for recovering other valuable metals. Adjust the pH value of the filtrate to 6-8, filter, and the filter residue is two Manganese oxide product, the filtrate is a solution product containing potassium permanganate, and the recovery rate of manganese is 15%.

Embodiment 2

[0026] Discharge, disassemble, crush, sort, sieve, and flotation separate the positive and negative electrode mixtures from the collected scrap lithium-ion batteries that use lithium manganate as the positive electrode material to obtain waste lithium manganate; Lithium and the additive potassium hydroxide are fully mixed at a mass ratio of 1:0.8 to form a mixture, and the mixture is calcined at 450°C for 5 hours in an air atmosphere; The potassium oxide solution is leached, and the leaching time is 10 minutes. After the leaching treatment, it is filtered. After washing, the filter residue can be used as a raw material for recovering other valuable metals. Adjust the pH value of the filtrate to 6-8, filter, and the filter residue is two Manganese oxide product, the filtrate is a solution product containing potassium permanganate, and the recovery rate of manganese is 23%.

Embodiment 3

[0028] Discharge, disassemble, crush, sort, sieve, and flotation separate the positive and negative electrode mixtures from the collected scrap lithium-ion batteries that use lithium manganate as the positive electrode material to obtain waste lithium manganate; Lithium and the additive potassium hydroxide are fully mixed at a mass ratio of 1:1.5 to form a mixture, and the mixture is roasted at 450°C for 3 hours in an air atmosphere; The potassium oxide solution is leached, and the leaching time is 10 minutes. After the leaching treatment, it is filtered. After washing, the filter residue can be used as a raw material for recovering other valuable metals. Adjust the pH value of the filtrate to 6-8, filter, and the filter residue is two Manganese oxide product, the filtrate is a solution product containing potassium permanganate, and the recovery rate of manganese is 27%.

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Abstract

The invention discloses a method of recovering manganese from a lithium ion battery cathode waste material containing manganese elements. The method comprises the following steps that (1) the powderycathode waste material containing manganese is obtained; (2) after the waste material containing manganese and an addition agent are mixed, the mixture is calcined under the oxygen condition, so thata product is obtained; and (3) the calcined product is subjected to water leaching and filtering operation, so that products are obtained, and are manganese dioxide and a solution containing potassiumpermanganate or manganese dioxide and a solution containing sodium permanganate. According to the method, the manganese technological recovery process is short, the cost is low, the operation is easy, the requirement for corrosion resistance of equipment is low, the additional values of the manganese products which are obtained through recovery are high, and no secondary pollution is generated inthe treatment process.

Description

technical field [0001] The invention relates to a method for recovering manganese from positive electrode waste of lithium ion batteries containing manganese. Background technique [0002] Lithium-ion batteries have been widely used in mobile phones, notebook computers, mobile power supplies, electric bicycles, electric vehicles, drones, and energy storage. Affected by the continuous and rapid expansion of the new energy vehicle market, the demand for power lithium-ion batteries has soared in the past two years. Since the service life of lithium-ion batteries is generally 2-3 years, the problems of environmental pollution and resource waste caused by discarded lithium-ion batteries have become increasingly prominent. The problem of how to properly dispose of discarded lithium-ion batteries cannot be ignored. [0003] Manganese is an important component in the positive electrode material of lithium-ion batteries. The methods for extracting manganese from scrap lithium-ion ba...

Claims

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Application Information

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IPC IPC(8): C22B47/00C22B1/02C22B7/00H01M10/54
CPCC22B47/00C22B1/02C22B7/008H01M10/54Y02W30/84Y02P10/20
Inventor 王大辉陈怀敬
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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