Method for recovering valuable metals from waste lithium manganese oxide battery

A technology of old lithium manganate and valuable metals, which is applied in the field of waste power battery recycling, can solve the problems of high technical difficulty, difficulty in ensuring batch consistency and complexity of recycled preparation materials, and achieve simple process, low cost, and metal The effect of high purity

Active Publication Date: 2010-09-15
CHERY AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

This patented method is difficult to ensure the batch consistency of the recovered and prepared materials, and complex and expensive element content tests are required every time, which is technically difficult

Method used

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  • Method for recovering valuable metals from waste lithium manganese oxide battery
  • Method for recovering valuable metals from waste lithium manganese oxide battery

Examples

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Embodiment 1

[0026] like figure 1 As shown, the method for recovering valuable metals from waste lithium manganese oxide batteries in this embodiment includes the following steps:

[0027] A: First discharge the waste lithium manganate battery with special discharge equipment, remove the outer packaging and shell of the battery with the help of a shear or cutter, take out the battery core, and use a grinder to crush the waste lithium manganate battery core into 0.5~5cm 2 pieces of size;

[0028] B: Soak the cell fragments in N, N-dimethylformamide organic solvent, the solid-liquid ratio of the cell fragments to the solvent is 0.05-1kg / L, and carry out mechanical stirring and intermittent ultrasonic oscillation treatment at the same time, soaking time for 5 hours ;

[0029] C: Separate the soaked battery fragments from the solvent by filtration, then wash and filter, then dry and vibrate and sieve, and get clean aluminum, copper, nickel foil and diaphragm on the sieve, which can be recov...

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Abstract

The invention provides a method for recovering valuable metals from a waste lithium manganese oxide battery with simple process, low cost and high purification purity to comprehensively metals such as manganese, lithium, aluminum, copper nickel and the like. The method comprises the following steps of: soaking and peeling off active substances of the battery in organic solvent to directly obtain clean aluminum, copper, nickel foils and diaphragms; reacting acid solution with LiMn2O4 in a battery electrical core to generate soluble salts of the lithium and the manganese; regulating a pH value to 5-7 by using NaOH solution or ammonia water to enable iron ions, aluminum ions and copper ions in the solution to be wholly deposited, filtering and separating; regulating the pH value to 10-12 by using the NaOH solution or the ammonia water, and depositing and filtering to obtain manganous hydroxide solids and lithium containing filtrate; and finally, firing the manganous hydroxide solids to obtain MnO2, reacting the lithium containing filtrate with sodium carbonate to generate lithium carbonate, and filtering, washing and drying the lithium carbonate to obtain pure lithium carbonate. Through the steps, the recovery rate of the lithium in the battery is higher than 85 percent.

Description

technical field [0001] The invention belongs to the technical field of recycling waste power batteries, in particular to a method for recycling valuable metals from waste lithium manganate batteries. Background technique [0002] With the explosive development of 3C electronic products and various electric tools, people's demand for secondary batteries has increased dramatically. The lithium-ion battery has the characteristics of being environmentally friendly, high specific energy (140Wh / kg), high voltage platform, long cycle life, good rate performance, small self-discharge, and no memory effect, which is far superior to lead-acid and Ni-Cd , Ni-MH batteries have been widely used in military and civilian fields. Compared with other power lithium-ion batteries, lithium manganate power lithium-ion batteries have the characteristics of lower cost, better cycle performance, higher energy density, good safety, easy synthesis, and good processability. Tools and other fields ha...

Claims

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Application Information

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IPC IPC(8): C22B7/00
CPCY02P10/20
Inventor 刘志远
Owner CHERY AUTOMOBILE CO LTD
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