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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 oxide 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 industrial pure oxygen storage, transportation and use, uneconomical industrial pure oxygen for personal use, The industrial pure oxygen amount is not large, etc., to achieve obvious economic and environmental benefits, reduce pollution treatment costs, and improve the effect of metal leaching rate

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

The consumption of nitric acid in the nitric acid leaching method is large, and a large amount of nitrogen oxides will be produced, polluting the environment
All wet processes have the problem of how to economically increase the leaching speed, increase the metal leaching rate, and reduce the consumption of acid and other auxiliary materials.
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

[0016] Example 1: Add 100 g of nickel-cobalt lithium manganate waste battery positive and negative mixed materials (containing 14.5% nickel, 20.3% cobalt, 17.5% lithium, 2.2% aluminum, 2.5% copper, and 12.9% manganese) to a stainless steel with a volume of 2L In the reaction kettle, add 1660ml of 1.5mol / L sulfuric acid, add Na 2 SO 3 55g (250ml solution), stirring at 40°C-50°C (stirring speed 80r / min) for 2.5h, liquid-solid separation after leaching, to obtain 1850ml leaching solution (excluding leaching slag washing water). The leaching rates of nickel, cobalt, lithium, copper, aluminum and manganese are 99.0%, 98.9%, 99.2%, 98.5%, 98.4% and 99.0% respectively (according to the nickel, cobalt and lithium in the leaching solution and leaching slag washing solution , copper, aluminum and manganese calculations).

Embodiment 2

[0017] Example 2: Add 300g of nickel-cobalt lithium manganate waste battery positive and negative mixed materials (containing 14.5% nickel, 20.3% cobalt, 17.5% lithium, 2.2% aluminum, 2.5% copper, and 12.9% manganese) to a stainless steel with a volume of 5L In the reaction kettle, add 3100ml of 3.0mol / L sulfuric acid, add Na 2 SO 3 185g (800ml solution), stirred at 70℃~80℃ (stirring speed 70r / min) for 1h, after the leaching, liquid-solid separation was carried out to obtain 3700ml leaching solution (excluding leaching slag washing water). The leaching rates of nickel, cobalt, lithium, copper, aluminum and manganese are 99.2%, 99.3%, 99.5%, 98.9%, 98.6% and 99.1% respectively (according to the nickel, cobalt and lithium in the leaching solution and leaching slag washing solution , copper, aluminum and manganese calculations).

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PUM

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Abstract

The invention provides a leaching method of a nickel cobalt lithium manganate waste battery positive electrode material, which comprises the following steps: putting a positive-negative electrode mixed material subjected to roasting pretreatment separated from nickel cobalt lithium manganate waste batteries into a pressure-resistant sulfuric-acid-corrosion-resistant container, pumping sulfuric acid into the container, sealing the container, pumping a Na2SO3 solution into the container by using a filling pump, closing the Na2SO3 solution inlet valve, and leaching.

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 batteries. 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, lith...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B23/00C22B26/12C22B47/00
CPCY02P10/20
Inventor 龙炳清周讯方绪坤
Owner SICHUAN NORMAL UNIVERSITY
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