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Method for recycling metal from waste Ni-Co lithium manganate battery

A technology of nickel-cobalt lithium manganese oxide and waste batteries, which is applied in the field of metal recycling, can solve the problems of atmospheric environment, water environment pollution, high anti-corrosion performance requirements, and increased recycling costs, and achieves easy operation and low equipment anti-corrosion requirements , The effect of low recycling cost

Active Publication Date: 2015-03-25
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The method for recovering metals from nickel-cobalt-lithium-manganese-oxide waste batteries that has been reported so far uses sulfuric acid, nitric acid, citric acid, and fluorine-containing organic acids to dissolve waste nickel-cobalt-lithium manganate in the recycling process, and inevitably produces Acid gas, NO x Exhaust gas and waste water with high acid content and organic content, which have caused serious pollution to the atmospheric environment and water environment
In addition, the dissolution process uses a higher acid concentration and adds hydrogen peroxide, which has high requirements on the anti-corrosion performance of the leaching equipment and increases the cost of recovery.
The subsequent treatment process after the dissolution of waste nickel cobalt lithium manganese oxide is long, which also makes the cost of recycling high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The collected nickel-cobalt-lithium-manganese-oxide waste batteries were placed in 1.0mol / L sodium hydroxide aqueous solution at room temperature for 2h discharge treatment; after discharge treatment, the scrapped lithium-ion batteries were disassembled to obtain positive plates ; According to the ratio (g / mL) of the quality of the positive electrode sheet and the volume of the ceramic crucible, the positive electrode sheet is packed into the ceramic crucible in a ratio of 1:15, and then placed in a box-type resistance furnace from room temperature at a temperature of 5° C. / min. The heating rate is to raise the temperature of the furnace to 550 °C and keep it warm for 20 minutes. According to the ratio of the mass of the positive electrode sheet to the volume of water (g / mL) of 1:50, put the positive electrode sheet into a container filled with water and use an electric stirrer at 50r Stirring at a stirring speed of 1 / min for 20 minutes, the temperature of the water duri...

Embodiment 2

[0027] The collected nickel-cobalt-lithium-manganese-oxide waste batteries were placed in 1.0mol / L sodium hydroxide aqueous solution at room temperature for 2h discharge treatment; after discharge treatment, the scrapped lithium-ion batteries were disassembled to obtain positive plates ; According to the ratio (g / mL) of the quality of the positive electrode sheet and the volume of the ceramic crucible, the positive electrode sheet is packed into the ceramic crucible in a ratio of 1:15, and then placed in a box-type resistance furnace from room temperature at a temperature of 5° C. / min. The heating rate is to raise the temperature of the furnace to 550 °C and keep it warm for 20 minutes. According to the ratio of the mass of the positive electrode sheet to the volume of water (g / mL) of 1:50, put the positive electrode sheet into a container filled with water and use an electric stirrer at 50r Stirring at a stirring speed of 1 / min for 20 minutes, the temperature of the water duri...

Embodiment 3

[0029] The collected nickel-cobalt-lithium-manganese-oxide waste batteries were placed in 1.0mol / L sodium hydroxide aqueous solution at room temperature for 2h discharge treatment; after discharge treatment, the scrapped lithium-ion batteries were disassembled to obtain positive plates ; According to the ratio (g / mL) of the quality of the positive electrode sheet and the volume of the ceramic crucible, the positive electrode sheet is packed into the ceramic crucible in a ratio of 1:15, and then placed in a box-type resistance furnace from room temperature at a temperature of 5° C. / min. The heating rate is to raise the temperature of the furnace to 550 °C and keep it warm for 20 minutes. According to the ratio of the mass of the positive electrode sheet to the volume of water (g / mL) of 1:50, put the positive electrode sheet into a container filled with water and use an electric stirrer at 50r Stirring at a stirring speed of 1 / min for 20 minutes, the temperature of the water duri...

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Abstract

A method for recycling metal from a waste Ni-Co lithium manganate battery comprises the following steps that the waste Ni-Co lithium manganate battery is discharged and disassembled or positive electrode scrap and positive electrode fragments are collected, a waste positive plate is obtained, calcination, dissolution and filtration are conducted on the waste positive plate, and then waste Ni-Co lithium manganate powder is obtained; the waste Ni-Co lithium manganate powder and potassium hydrogen sulfate are mixed according to a certain proportion and then calcined, a calcined product is leached through water, a potassium carbonate solution is added into a solution, filtration is conducted, carbonate is supplemented to adjust the proportion of Li, Ni, Co and Mn in a filter residue, ball grinding, compression and calcination are conducted on the filter residue, and the Ni-Co lithium manganate positive electrode material is obtained again. Constituent adjustment is conducted on filtrate through sulfuric acid, and potassium hydrogen sulfate obtained after crystallization can be reused.

Description

technical field [0001] The invention relates to a technology for recovering metals from nickel-cobalt lithium manganate waste batteries. Background technique [0002] Lithium-ion 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. According to statistics, in 2009, the output of lithium-ion batteries in my country reached 1.87 billion, and in 2010, the output of lithium-ion batteries in my country reached 2.68 billion. Since the service life of lithium-ion batteries is generally 2-3 years, the problems of environmental pollution and resource waste caused by discarded lithium-ion batteries have become increasingly prominent. The problem of how to properly dispose of discarded lithium-ion batteries cannot be ignored. The recycling and reuse of resources such as Co, Ni, Mn, Li, Al, and Cu in waste lithium-ion batteries not only overcomes the environme...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCY02W30/84H01M10/54
Inventor 陈怀敬王大辉文豪
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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