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Method for leaching positive pole material of waste lithium nickelate battery

A lithium nickel oxide waste battery and positive electrode material technology, applied in the direction of improving process efficiency, etc., can solve the problems of uneconomical industrial pure oxygen for personal use, troublesome storage, transportation and use of industrial pure oxygen, and small amount of industrial pure oxygen. Achieve obvious economic and environmental benefits, lower pollution control costs, and increase metal leaching rates

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

Hydrochloric acid leaching method, equipment corrosion, large amount of acid mist and environmental pollution
Sulfuric acid leaching consumes more expensive reducing agents (such as hydrogen peroxide, etc.), and the leaching speed is slow and the acid consumption is high
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

[0015] 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 reaction kettle that volume is 2L, adds the sulfuric acid 1300ml of 1.5mol / L, join (NH 4 ) 2 SO 3 59g (300ml solution), stirring at 40°C-50°C (stirring speed 80r / min) for 2.5 hours, liquid-solid separation after leaching, to obtain 1550ml leaching solution (excluding leaching slag washing water). The leaching rates of nickel, lithium, copper, and aluminum are 99.0%, 99.2%, 98.5%, and 98.2% respectively (calculated based on nickel, lithium, copper, and aluminum entering the leaching solution and leaching slag washing solution).

Embodiment 2

[0016] Embodiment 2: 500g lithium nickelate waste battery cathode material (containing nickel 54.3%, lithium 5.5%, copper 7.8%, aluminum 3.1%) is added in the stainless steel reaction kettle that volume is 5L, adds the sulfuric acid 3200ml of 3.5mol / L , join (NH 4 ) 2 SO 3 310g (1600ml solution), stirring at 70℃~80℃ (stirring speed 70r / min) for 1.0 hour, liquid-solid separation after leaching, to obtain 4600ml leaching solution (excluding leaching slag washing water). The leaching rates of nickel, lithium, copper and aluminum are 99.6%, 99.7%, 99.2% and 99.0% respectively (calculated based on nickel, lithium, copper and aluminum entering the leaching solution and leaching slag washing solution).

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PUM

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Abstract

The invention discloses a method for leaching a positive pole material of a waste lithium nickelate battery. The method comprises the steps of putting the positive pole material which is separated from the waste lithium nickelate battery and is subjected to roasting pretreatment into a vessel which is resistant to pressure and the corrosion of sulfuric acid, pumping sulfuric acid into the vessel, then, sealing the vessel, pumping a (NH4) 2SO3 solution into the vessel by using an injection pump, then, closing a (NH4) 2SO3 solution pumping valve, and leaching.

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 nickelate waste batteries 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, lithium and copper 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/08C22B15/00C22B21/00C22B23/00C22B26/12
CPCY02P10/20
Inventor 龙炳清舒曼曾伟
Owner SICHUAN NORMAL UNIVERSITY
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