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Method for leaching positive-negative pole material mixture of waste lithium nickel cobalt manganese oxide battery

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 amount of industrial pure oxygen is not large, to achieve obvious economic and environmental benefits, improve metal leaching rate, and low cost

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

[0023] 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 165mL alcohol production wastewater ( Contains COD Cr 50000mg / L) mixed with sulfuric acid and nitric acid, 1650ml of mixed acid solution with a sulfuric acid concentration of 1.5mol / L and a nitric acid concentration of 5g / L was added to a titanium-lined pressure reactor with a volume of 2L, and the mixture was stirred at 50°C to 60°C ( Stirring speed 80r / min) leaching for 4 hours, liquid-solid separation after leaching to obtain 1600ml leaching solution (excluding leaching slag washing water). The leaching rates of nickel, cobalt, lithium, copper, aluminum and manganese are 99.4%, 99.2%, 99.4%, 99.0%, 98.6% and 99.2% respectively (according to the nickel, cobalt and lithium in the leaching solution and leaching slag washing solution , copper, aluminum and manganese...

Embodiment 2

[0024] Example 2: 300g 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, 12.9% manganese) and 340mL starch to produce concentrated wastewater (with COD Cr90000mg / L) mixed with sulfuric acid and nitric acid, 3000ml of mixed acid solution with a sulfuric acid concentration of 3mol / L and a nitric acid concentration of 10g / L was added to a titanium-lined pressure reactor with a volume of 5L, and the mixture was stirred at 70°C to 80°C (stirring Speed ​​70r / min) leaching for 2h, liquid-solid separation after leaching, to obtain 2800ml leaching solution (excluding leaching slag washing water). The leaching rates of nickel, cobalt, lithium, copper, aluminum and manganese are 99.6%, 99.4%, 99.7%, 99.1%, 98.5% and 99.4% respectively (according to the nickel, cobalt and lithium in the leaching solution and leaching slag washing solution , copper, aluminum and mangane...

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PUM

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Abstract

The invention discloses a method for leaching a positive-negative pole material mixture of a waste lithium nickel cobalt manganese oxide battery. The method comprises the steps of adding the positive-negative pole material mixture which is separated from the waste lithium nickel cobalt manganese oxide battery and is subjected to roasting pretreatment, and high-concentration organic wastewater which does not contain benzene-ring substances into a reaction kettle which is resistant to pressure and the corrosion of sulfuric acid and nitric acid, adding a mixed solution of sulfuric acid and nitric acid, and leaching while stirring under closed conditions.

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 battery (battery whose main metal elements are nickel, cobalt, manganese, and lithium in the positive and negative mixed materials) is a new type of battery. After the battery is used and scrapped, a large number of waste batteries will be produced. 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, ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B15/00C22B21/00C22B23/00C22B26/12C22B47/00
CPCY02P10/20
Inventor 龙炳清陈建文邓国海
Owner SICHUAN NORMAL UNIVERSITY
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