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Lithium manganate battery cathode material recovery method

A technology of lithium manganate battery and positive electrode material is applied in the field of waste battery recycling, which can solve the problems of secondary pollution of waste acid or waste alkali, inability to guarantee waste, and large investment, and achieve the effect of broad application prospects.

Active Publication Date: 2015-08-19
天齐锂业(江苏)有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods can realize the recovery of lithium manganese oxide battery positive electrode materials to a certain extent, but the above methods all adopt wet treatment, and the waste acid or waste alkali generated is easy to cause secondary pollution. In addition, the treatment plant needs to be designed separately according to the process Or workshops, the investment is large, and the waste used as raw materials for recycling factories cannot be guaranteed for a long period of time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 adopts the inventive method to reclaim lithium manganate battery cathode material

[0031] Discharge the residual power of the waste lithium manganate power battery, disassemble the battery, take out the positive electrode, and recycle the battery case according to the classification of aluminum shell, steel shell, plastic, etc.; the positive electrode is heat-treated at 300°C, and then ball milled and sieved to separate the aluminum foil and the positive electrode Material mixture; the mixture is calcined at 1000°C and then pressed into balls.

[0032] Take 100kg of the mixture after pressing the ball, add 20kg of coke, 15kg of lime, and 16kg of silica, put it into an electric furnace for smelting for 2 hours, and cast it to obtain 70kg of manganese-silicon alloy. Lithium-containing solution was obtained by acid leaching the slag, and sodium carbonate solution was added to precipitate, and filtered to obtain 11 kg of lithium carbonate.

[0033] After test...

Embodiment 2

[0034] Embodiment 2 adopts the inventive method to reclaim lithium manganese oxide battery cathode material

[0035] Discharge the residual power of the waste lithium manganate power battery, disassemble the battery, take out the positive electrode, and recycle the battery case according to the classification of aluminum shell, steel shell, plastic, etc.; the positive electrode is heat-treated at 400°C, and then ball milled and sieved to separate the aluminum foil and the positive electrode Material mixture; the mixture is calcined at 1200°C and then pressed into balls.

[0036] Take 100kg of the mixture after pressing the ball, add 18kg of petroleum coke, 14kg of lime, and 17kg of silica, put it into an electric furnace for smelting for 1 hour, and cast it to obtain 68kg of manganese-silicon alloy. The slag was acid-leached to obtain a lithium-containing solution, and then a sodium carbonate solution was added for precipitation, and filtered to obtain 10 kg of lithium carbona...

Embodiment 3

[0038] Embodiment 3 adopts the inventive method to reclaim lithium manganate battery cathode material

[0039] Discharge the residual power of the waste lithium manganate power battery, disassemble the battery, take out the positive electrode, and recycle the battery case according to the classification of aluminum shell, steel shell, plastic, etc.; the positive electrode is heat-treated at 600°C, and then ball milled and sieved to separate the aluminum foil and the positive electrode Material mixture; the mixture is calcined at 1100°C and then pressed into balls.

[0040] Take 100kg of the mixture after pressing the ball, add 22kg of bituminous coal, 18kg of lime, and 13kg of silica, put it into an electric furnace for smelting for 3 hours, and cast it to obtain 71kg of manganese-silicon alloy. The slag was acid-leached to obtain a lithium-containing solution, and then a sodium carbonate solution was added for precipitation, and filtered to obtain 10 kg of lithium carbonate. ...

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PUM

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Abstract

The present invention relates to the technical field of waste battery recycling. Disclosed is a method for recycling lithium manganese battery anode material, the method comprising the step of separating aluminum foil from a lithium manganese battery anode plate, in particular, heating the lithium manganese battery anode plate at 300-600℃ for 1-4 hrs; separating the aluminum foil therefrom to obtain a mixture of a lithium manganese anode material, a conductive agent, and a bonding agent; calcining the mixture at 1000-1200℃ for 1-3 hrs for pelletizing; mixing uniformly the pelletized mixture with carbonaceous reductant, silica, and lime according to a weight ratio of 100:18-22: 13-17: 14-18; smelting the mixture in an electric furnace for 1-3 hrs to obtain a manganese-silicon alloy and slag; conducting acid leaching on the slag to obtain a lithium-containing solution; and then adding a sodium carbonate solution, precipitating, and filtrating to obtain lithium carbonate.

Description

technical field [0001] The invention relates to a method for recycling positive electrode materials of lithium manganate batteries, and belongs to the technical field of recycling waste batteries. Background technique [0002] Lithium batteries are a new generation of secondary batteries developed rapidly in the 1990s, and are widely used in small portable electronic communication products and electric vehicles. Traditional nickel-metal hydride batteries, nickel-cadmium batteries, and lead-acid batteries have been affected by the supporting sales of lithium batteries. The high-end market for lithium batteries for mobile phones and notebook computers has been squeezed out, and the demand for lithium batteries has increased significantly. Since Sony developed the first lithium battery in 1992, the energy of lithium batteries has also been greatly improved. The anode material of lithium batteries has developed from a single lithium cobalt oxide material to lithium cobalt oxide,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54B09B3/00
CPCC01D15/08Y02W30/84H01M10/54
Inventor 熊仁利严新星何霞王平黄春莲王梓丞
Owner 天齐锂业(江苏)有限公司
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