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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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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] Example 1: 100g of mixed materials for the positive and negative electrodes of waste nickel-cobalt manganese batteries (containing 14.5% nickel, 20.3% cobalt, 17.5% lithium, 2.2% aluminum, 2.5% copper, and 12.9% manganese) and ground pyrolusite (Particle size 200 mesh, MnO 2 The content is 55%, and the amount added is 105% of the theoretical amount.) Put it into a 2L titanium-lined pressure reactor, add 4.0mol / L sulfuric acid 1800ml, add 10g nitric acid (in HNO 3 Calculate), leaching for 3.5 hours with stirring at 50-60°C (stirring speed 80r / min), after leaching, liquid-solid separation is performed to obtain 1650ml leaching solution (without leaching residue 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 respectively 98.7%, 98.9%, 99.4%, 98.6%, 99.6% and 98.2% (according to the nickel, cobalt, and lithium in the leaching solutio...

Example Embodiment

[0043] Example 2: 300g of mixed materials for positive and negative electrodes of waste nickel-cobalt manganese batteries (containing 14.5% nickel, 20.3% cobalt, 17.5% lithium, 2.2% aluminum, 2.5% copper, 12.9% manganese, and ground pyrolusite ( 180 mesh, MnO 2 The content is 45%, and the amount added is 103% of the theoretical amount.) Put into a 5L titanium-lined pressure reactor, add 4.8L of 3.5mol / L sulfuric acid, and add 50g of nitric acid (with HNO 3 Calculate), stir for 2.5 hours at 60~70℃ (stirring speed is 70r / min), and carry out liquid-solid separation after leaching, to obtain 4.7L leaching solution (excluding leaching residue washing water), reaction tail gas is about 0.2L, The nitrogen oxide concentration is 2.1 mg / m 3 . The leaching rates of nickel, cobalt, lithium, copper, aluminum and manganese are respectively 98.9%, 99.0%, 99.6%, 98.5%, 99.4% and 99.2% (according to the nickel, cobalt, and lithium in the leaching solution and the washing solution of the lea...

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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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