Leaching method for anode material of waste LiNiO2 battery

A lithium nickel oxide waste battery and positive electrode material technology, which is applied in the direction of improving process efficiency, can solve the problems of environmental pollution, large consumption of nitric acid, large nitrogen oxides, etc., and achieve reduced consumption of nitric acid, obvious economic benefits and environmental protection Benefits, the effect of saving pollution control costs

Inactive Publication Date: 2009-11-25
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

[0022] Embodiment 1: 100g lithium nickelate waste battery positive electrode material (containing nickel 54.3%, lithium 5.5%, copper 7.8%, aluminum 3.1%) is added in the stainless steel autoclave that volume is 2L, adds the nitric acid 1700ml of 3.0mol / L, Introduce 0.2MPa industrial pure oxygen, stir at 40-50°C (stirring speed 80r / min) for leaching for 2.0 hours, carry out liquid-solid separation after leaching, and obtain 1650ml leaching solution (excluding leaching slag washing water). The reaction tail gas is about 900ml (converted into a volume with an absolute pressure of 0.1MPa), and the concentration of nitrogen oxides is 7.5mg / m 3 . The leaching rates of nickel, lithium and copper are 98.5%, 98.7% and 96.9% (calculated according to the nickel, lithium and copper entering the leaching solution and leaching slag washing solution).

Embodiment 2

[0023] Embodiment 2: 400g nickel metal hydride waste battery cathode material (containing nickel 54.3%, lithium 5.5%, copper 7.8%, aluminum 3.1%) is added in the stainless steel autoclave that volume is 10L, adds the nitric acid 8.3L of 2.5mol / L, Introduce industrial pure oxygen of 0.1MPa, stir at 50-60°C (stirring speed 80r / min) for 3 hours, carry out liquid-solid separation after leaching, obtain 8.1L leaching solution (excluding leaching slag washing water), and react The exhaust gas is about 3.4L (converted into a volume with an absolute pressure of 0.1MPa), and the concentration of nitrogen oxides is 6.3mg / m 3 . The leaching rates of nickel, lithium and copper are 98.4%, 98.9% and 97.6% (calculated according to nickel, lithium and copper entering the leaching solution and leaching slag washing solution).

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PUM

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Abstract

A leaching method for the anode material of waste LiNiO2 battery provided by the invention comprises the following steps: putting the anode material separated from the waste LiNiO2 battery into a pressure-resistant and nitric acid resistant container, and then sealing the container and pumping nitric acid into the container; leaching the anode material of the waste LiNiO2 battery by adding industrial pure oxygen. The leaching temperature is 20-100 DEG C; the leaching pressure is 0.05-0.5MPa; the initial concentration of the leached nitric acid is 1-6mol / L; the leaching time is 1-4h; the leaching process needs stirring; and the stirring speed is 30-100r / min. The adding amount of nitric acid is 101-130% of the theoretical quantity of the nitric acid consuming by leaching all the metal out from the anode material added in a reaction vessel.

Description

technical field [0001] The invention relates to a method for leaching the cathode material of lithium nickelate waste batteries. Background technique [0002] Lithium nickel oxide battery is a kind of widely used 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 electrode material of lithium nickel oxide battery mainly contains nickel, lithium, copper and aluminum, and the total content of nickel, lithium and copper is more than 60%, which is very valuable for recycling. At present, the processes for recovering nickel and nickel from the positive electrode materials of lithium nickelate waste batteries mainly include fire process and wet process. The products obtained by the fire process are alloy materials, and it is difficult to obtain rela...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B3/06C22B23/00C22B15/00C22B26/12
CPCY02P10/20
Inventor 龙炳清魏涛龙怡张章
Owner SICHUAN NORMAL UNIVERSITY
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