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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

[0025] Example 1: 100g 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, 12.9% manganese) and 29g ≤ 1.5mm sawdust Put it into a titanium-lined pressure reactor with a volume of 2L, add 1650ml of a mixed acid solution with a sulfuric acid concentration of 1.5mol / L and a nitric acid concentration of 5g / L, and leaching at 50°C to 60°C (stirring speed 80r / min) for 4h , after the leaching is finished, liquid-solid separation is carried out to obtain 1600ml leaching solution (excluding leaching slag washing water). The leaching rates of nickel, cobalt, lithium, copper, aluminum and manganese are 99.1%, 98.9%, 99.2%, 98.0%, 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

[0026] 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 105g ≤ 1.5mm sawdust Put it into a titanium-lined pressure reactor with a volume of 5L, add 3000ml of a mixed acid solution with a sulfuric acid concentration of 3mol / L and a nitric acid concentration of 10g / L, and leaching at 70°C to 80°C (stirring speed: 70r / min) for 2 hours. After leaching, carry out liquid-solid separation to obtain 2800ml leaching solution (excluding leaching slag washing water). The leaching rates of nickel, cobalt, lithium, copper, aluminum and manganese are 99.5%, 99.3%, 99.6%, 99.4%, 98.4% and 99.2% 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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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: adding a positive-negative electrode mixed material subjected to roasting pretreatment and separated from nickel cobalt lithium manganate waste batteries and wood dust into a pressure-resistant sulfuric-acid / nitric-acid-corrosion-resistant reaction kettle, adding a sulfuric acid-nitric acid mixed solution, and carrying out agitation leaching under sealed 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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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/06C22B15/00C22B21/00C22B23/00C22B26/12C22B47/00
CPCY02P10/20
Inventor 龙炳清张章崔伟
Owner SICHUAN NORMAL UNIVERSITY
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