A method and system for recovering lithium and manganese from waste lithium manganese oxide batteries

An old lithium manganate and lithium recovery technology, applied in the field of lithium battery recovery, can solve the problems of bacterial culture, harsh use conditions, complex operation of ion exchange method, and restrictions on the application and promotion of technology, so as to eliminate the use of organic extractants and products High purity, the effect of improving product purity

Active Publication Date: 2020-06-30
青海中科德方能源科技研究有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method recovers manganese and lithium elements, but high temperature treatment is used many times, the energy consumption is high, and the lithium yield is low
[0005] Other methods such as ion exchange method, sulfide bacteria leaching, etc. have successfully recovered valuable metal elements, but these methods have certain limitations. For example, the operation of ion exchange method is relatively complicated and the steps are cumbersome, and it is only suitable for the separation and purification of a small amount of ions. ; Bacteria culture, harsh conditions of use, and difficulty in industrialization of sulfide bacteria leaching technology have restricted the application and promotion of the technology

Method used

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  • A method and system for recovering lithium and manganese from waste lithium manganese oxide batteries
  • A method and system for recovering lithium and manganese from waste lithium manganese oxide batteries
  • A method and system for recovering lithium and manganese from waste lithium manganese oxide batteries

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Effect test

Embodiment 1

[0084] A certain type of waste lithium manganese oxide battery is used as raw material. Firstly, the waste batteries are discharged, disassembled, and screened to obtain positive electrode materials. Weigh 850g of lithium manganate positive electrode material and treat it in a muffle furnace at 450°C for 2h, then remove the binder, quench it with water and process it in ultrasonic vibration for 30min, so that the positive electrode material and aluminum foil are peeled off. The large mesh screen is used to remove and separate the aluminum foil, and the aluminum foil can be directly used for aluminum smelting after washing. The obtained black fine slag was treated with 4mol / L sulfuric acid, and 30% hydrogen peroxide was added at the same time, the solid-liquid ratio was controlled to be 80g / L, the temperature was controlled at 30°C, and the leaching solution of valuable metals was obtained by filtration. The acid leaching residue is mainly acid-insoluble matter such as carbon ...

Embodiment 2

[0093] A certain type of waste lithium manganese oxide battery is used as raw material. Firstly, the waste batteries are discharged, disassembled, and screened to obtain positive electrode materials. Weigh 1200g of lithium manganate cathode material and treat it in a muffle furnace at 550°C for 1 hour, then remove the binder, quench it with water, and process it in ultrasonic vibration for 30 minutes to peel off the cathode material and aluminum foil. The large mesh screen is used to remove and separate the aluminum foil, and the aluminum foil can be directly used for aluminum smelting after washing. The obtained black fine slag was treated with 2mol / L sulfuric acid, and 30% hydrogen peroxide was added at the same time, the solid-liquid ratio was controlled to 80g / L, the temperature was controlled at 80°C, and the leaching solution of valuable metals was obtained by filtration. The acid leaching residue is mainly acid-insoluble matter such as carbon powder. After testing the...

Embodiment 3

[0101] A certain type of waste lithium manganese oxide battery is used as raw material. Firstly, the waste batteries are discharged, disassembled, and screened to obtain positive electrode materials. Weigh 600g of lithium manganate cathode material and treat it in a muffle furnace at 650°C for 1 hour, then remove the binder, quench it with water, and process it in ultrasonic vibration for 60 minutes to peel off the cathode material and aluminum foil. The large mesh screen is used to remove and separate the aluminum foil, and the aluminum foil can be directly used for aluminum smelting after washing. The obtained black fine slag was treated with 3mol / L sulfuric acid, and 30% hydrogen peroxide was added at the same time, the solid-liquid ratio was controlled to 95g / L, the temperature was controlled at 80°C, and the leaching solution of valuable metals was obtained by filtration. The acid leaching residue is mainly acid-insoluble matter such as carbon powder. After testing the ...

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Abstract

The invention discloses a method and a system for recovering lithium and manganese from waste lithium manganate batteries. The method includes: dismantling the positive electrode sheet from the waste lithium manganese oxide battery; removing the binder in the positive electrode sheet, and then leaching the valuable metal elements in the positive electrode sheet through acid solution to obtain an acidified leachate; using an ultrafiltration membrane to The acidified leachate is subjected to ultrafiltration treatment; the lithium ions in the acidified leachate are separated from other cations different from lithium ions by using nanofiltration membrane technology to obtain a lithium-containing solution and a solution containing other cations, which are then concentrated and enriched by reverse osmosis technology. set, the other cations include manganese ions; and, the lithium ions in the lithium-containing solution are precipitated by using a lithium precipitant, and the manganese ions in the solution containing other cations are precipitated by using an alkaline substance, so as to realize the separation of lithium and manganese Recycle. The invention adopts ultrafiltration-nanofiltration-reverse osmosis combined technology, and has the characteristics of simple and environmentally friendly process, less acid and alkali consumption, good and stable membrane separation effect, and the like.

Description

technical field [0001] The invention relates to a method for recovering lithium and manganese from waste lithium manganese oxide batteries and a corresponding system, belonging to the technical field of lithium battery recovery. Background technique [0002] Lithium and its compounds are strategic materials of great significance in the national economy and national defense construction, and are also new green energy materials closely related to people's lives. As a new type of chemical power source, lithium-ion battery has become the main energy source of 3C electronic products, accounting for more than 80% of the consumer electronics market. In recent years, the continuous progress of lithium battery technology and the improvement of energy density have greatly increased the demand in the fields of new energy vehicles and energy storage power supplies, which has led to a substantial increase in the production and sales of lithium-ion batteries year-on-year. Lithium mangane...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54C22B3/38C22B26/12C22B47/00
CPCC22B26/12C22B47/00C22B3/408H01M10/54Y02W30/84
Inventor 彭正军王敏祝增虎王怀有赵有璟贾国凤李积升
Owner 青海中科德方能源科技研究有限公司
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