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Method for leaching anode and cathode mixed material of waste lithium nickel manganese cobalt battery

A technology of nickel-cobalt-lithium-manganese-manganate and mixed materials, which is applied in the field of leaching of positive and negative electrode mixed materials of nickel-cobalt-lithium-manganese-oxide waste batteries, can solve the problems of large nitrogen oxides, large consumption of nitric acid, and environmental pollution, and achieve obvious Economic and environmental benefits, saving pollution control costs, and avoiding the effects of pollutant nitrogen oxides

Inactive Publication Date: 2010-01-06
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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1: Add 100 g of nickel-cobalt lithium manganate waste battery positive and negative electrode mixed materials (containing 14.5% nickel, 20.3% cobalt, 17.5% lithium, 2.2% aluminum, 2.5% copper, and 12.9% manganese) into a liner with a volume of 2L In the titanium autoclave, add 1400ml of sulfuric acid of 3.0mol / L, add nitric acid 20g (as HNO 3 0.2 MPa of industrial pure oxygen, stirring at 50-60°C (stirring speed 80r / min) for 3 hours, liquid-solid separation after leaching, to obtain 1300ml leaching solution (excluding leaching slag washing water ). The reaction tail gas is about 1.8L (converted into a volume with an absolute pressure of 0.1MPa), and the concentration of nitrogen oxides is 2.6mg / m 3 . The leaching rates of nickel, cobalt and lithium are 98.1%, 98.4% and 99.3% (calculated according to the nickel, cobalt and lithium entering the leaching solution and leaching slag washing solution).

Embodiment 2

[0050] 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, 12.9% manganese) into a liner with a volume of 5L In the titanium autoclave, add 4.8L of sulfuric acid of 2.5mol / L, add nitric acid 80g (as HNO 3 ) into 0.1MPa industrial pure oxygen, stirring at 60-70°C (stirring speed: 80r / min) for 2.5 hours, and liquid-solid separation after leaching to obtain 4.7L leaching solution (excluding leaching slag washing water), the reaction tail gas is about 0.4L (converted into a volume of 0.1MPa absolute pressure), and the concentration of nitrogen oxides is 3.1mg / m 3 . The leaching rates of nickel, cobalt and lithium are 98.2%, 98.7% and 99.5% respectively (calculated according to nickel, cobalt and lithium entering the leaching solution and leaching slag washing solution).

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Abstract

The invention relates to a method for leaching an anode and cathode mixed material of a waste lithium nickel manganese cobalt battery, which comprises the following steps: putting an anode and cathode mixed material separated out of a waste lithium nickel manganese cobalt battery in a container which is resistant to pressure and the corrosion of sulphuric acid and nitric acid; then sealing the container and pumping the sulphuric acid and the nitric acid into the container; and leading industrial pure oxygen into the container to leach out the anode and cathode mixed material of the waste lithium nickel manganese cobalt battery, wherein leaching temperature is 20-100 DEG C; leaching pressure is 0.05-0.5MPa; the initial concentration of the leaching sulphuric acid is 1-5mol / L; the initial concentration of the nitric acid is 5-20g / L; reaction time is 1-5 hours; stirring is carried out in a reaction process, and stirring speed is 30-100r / min; and the addition of the sulphuric acid is 101-200 percent of the theoretical sulphuric acid consumption of all leached metal in the anode and cathode mixed material added into the container.

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 battery (a battery whose main metal elements are nickel, cobalt, manganese, and lithium in the positive electrode material) is 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. Nickel cobalt lithium manganese oxide positive and negative electrode mixed materials mainly contain nickel, cobalt, lithium, copper, aluminum and manganese, among which the total content of nickel, cobalt and lithium is as high as more than 50%, which is very valuable for recycling. At present, the processes for recovering nickel,...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B3/06C22B3/08C22B23/00C22B26/12
CPCY02P10/20
Inventor 龙炳清魏涛龙怡舒曼孙彦君曾伟
Owner SICHUAN NORMAL UNIVERSITY
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