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Leaching method of nickel cobalt lithium manganate waste battery positive-negative electrode mixed material

A technology of nickel-cobalt-lithium-manganese-manganate and mixed materials, which is applied in the field of leaching the positive and negative electrode mixed materials of nickel-cobalt-lithium-manganese-oxide waste batteries, can solve the problems of storage, transportation and use of industrial pure oxygen, and uneconomical use of industrial pure oxygen for self-use. The amount of industrial pure oxygen is not large, achieving obvious economic and environmental benefits, saving pollution control costs, and being easy to apply in engineering

Inactive Publication Date: 2014-04-30
SICHUAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the pure oxygen leaching method in the nitric acid processing industry and the pure oxygen leaching method in the mixed acid processing industry have solved the above problems, the leaching equipment is more complicated, and the amount of industrial pure oxygen required for the leaching of waste batteries is not large, and waste battery treatment enterprises produce on-site Industrial pure oxygen is not economical for personal use, and the storage, transportation and use of industrial pure oxygen are troublesome

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: 100g nickel-cobalt lithium manganate waste battery positive and negative mixed material (containing 14.5% nickel, 20.3% cobalt, 17.5% lithium, 2.2% aluminum, 2.5% copper, 12.9% manganese) and finely ground pyrolusite (particle size 200 mesh, MnO 2 content of 55%, and the amount added is 105% of the theoretical amount) into a titanium-lined pressure reactor with a volume of 2L, 1800ml of 4.0mol / L sulfuric acid, and 10g of nitric acid (in the form of HNO 3 ) and stirred at 50-60°C (stirring speed: 80r / min) for 3.5 hours. After the leaching, liquid-solid separation was carried out to obtain 1650ml leaching solution (excluding leaching slag washing water). The reaction tail gas is about 0.2L, and the nitrogen oxide concentration is 1.6 mg / m 3 . The leaching rates of nickel, cobalt, lithium, copper, aluminum and manganese are 98.7%, 98.9%, 99.4%, 98.6%, 99.6% and 98.2% respectively (according to the nickel, cobalt and lithium in the leaching solution and le...

Embodiment 2

[0043] Embodiment 2: 300g nickel-cobalt lithium manganese acid lithium waste battery positive and negative mixed material (containing nickel 14.5%, cobalt 20.3%, lithium 17.5%, aluminum 2.2%, copper 2.5%, manganese 12.9% and fine pyrolusite ( Particle size 180 mesh, MnO 2 content of 45%, and the addition amount is 103% of the theoretical amount) into a titanium-lined pressure reactor with a volume of 5L, add 4.8L of 3.5mol / L sulfuric acid, and add 50g of nitric acid (in the form of HNO 3 ) and stirred at 60-70°C (stirring speed: 70r / min) for 2.5 hours. After the leaching, liquid-solid separation was carried out to obtain 4.7L leaching solution (excluding leaching slag washing water), and the reaction tail gas was about 0.2L. The concentration of nitrogen oxides is 2.1 mg / m 3 . The leaching rates of nickel, cobalt, lithium, copper, aluminum and manganese are 98.9%, 99.0%, 99.6%, 98.5%, 99.4% and 99.2% respectively (according to the nickel, cobalt and lithium in the leachi...

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Abstract

The invention provides a leaching method of a nickel cobalt lithium manganate waste battery positive-negative electrode mixed material, which comprises the following steps: putting a positive-negative electrode mixed material separated from nickel cobalt lithium manganate waste batteries and ground pyrolusite into a pressure-resistant sulfuric-acid / nitric-acid-corrosion-resistant container, pumping sulfuric acid and nitric acid into the container, sealing the container, and leaching the nickel cobalt lithium manganate waste battery positive-negative electrode mixed material.

Description

technical field [0001] The invention relates to a method for leaching the positive and negative electrode mixed materials of nickel-cobalt lithium manganate waste battery. Background technique [0002] Nickel-cobalt-lithium manganese oxide batteries (batteries whose positive electrode materials contain nickel, cobalt, manganese, and lithium as the main metal elements) are a new type of battery, and a large amount of waste batteries will be produced after the battery is scrapped. Because this type of battery contains a large amount of heavy metals, if it is discarded into the environment, it will cause great direct and potential harm to the environment. The positive and negative mixed materials of nickel cobalt lithium manganate battery mainly contain nickel, cobalt, lithium, copper, aluminum and manganese, of which the total content of nickel, cobalt and lithium is as high as 50%, which is very valuable for recycling. At present, the processes for recovering cobalt, lithiu...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B23/00C22B26/12C22B47/00C22B15/00C22B21/00C22B3/08
CPCY02P10/20
Inventor 龙炳清聂付江邓其军
Owner SICHUAN NORMAL UNIVERSITY
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