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Method for cleanly recycling nickel and/or cobalt from positive electrode material

A cathode material and raw material technology, applied in the field of resource recovery, can solve problems such as inability to achieve high-efficiency recovery, and achieve the effects of less difficulty in removal, strong selectivity, and low cost

Active Publication Date: 2017-02-22
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the efficient recovery of nickel and cobalt in battery cathode materials cannot be realized by ammonia leaching at room temperature and pressure by the method of treating laterite nickel ore.

Method used

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  • Method for cleanly recycling nickel and/or cobalt from positive electrode material

Examples

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Effect test

Embodiment 1

[0053] A method for reclaiming nickel and cobalt in waste nickel-cobalt-manganese ternary cathode materials, said method comprising the steps of:

[0054] (1) Place the waste nickel-cobalt-manganese ternary positive electrode material in a high-temperature furnace and reduce it by coke at 500°C, and grind the reduced block material in a mill to obtain a reduced powder;

[0055] (2) Mix the reduction powder and ammonium bicarbonate solution in the reaction kettle, and the ammonium bicarbonate solution is mixed with NH 3 The concentration of the meter is 50g / L, and the liquid-solid volume mass ratio (L / kg) is 20; After the above operations are completed, the airtight reactor is fed into carbon dioxide gas, and the pressure in the reactor is 0.2MPa, and the reaction temperature is 10°C. The nickel and cobalt in the positive electrode material are leached under the following conditions, and then the liquid-solid separation of the reacted material is carried out to obtain the leach...

Embodiment 2

[0061] A method for reclaiming nickel in the positive electrode material of waste nickel-hydrogen batteries, said method comprising the steps of:

[0062] (1) Put the positive electrode material of the waste nickel-metal hydride battery in a high-temperature furnace and reduce it by carbon monoxide at 700°C, and grind the reduced block material in a mill to obtain a reduced powder;

[0063] (2) Mix the reduction powder and ammonia water in the reaction kettle, and the ammonia water is mixed with NH 3 The concentration of meter is 80g / L, and liquid-solid volume mass ratio (L / kg) is 15; Airtight reactor after finishing above-mentioned operation, feeds carbon dioxide gas, and in reactor pressure is 0.5MPa, and reaction temperature is the condition of 40 ℃ The nickel in the positive electrode material is leached under the following conditions, and the liquid-solid separation of the reacted material is carried out to obtain the leaching residue and the leachate respectively;

[00...

Embodiment 3

[0068] A method for reclaiming nickel in waste nickel-cadmium battery anode materials, said method comprising the steps of:

[0069] (1) Place the waste nickel-cadmium battery anode material in a high-temperature furnace to be reduced by hydrogen at 900°C, and the reduced block is ground in a mill to obtain a reduced powder;

[0070] (2) Mix the reduction powder with the ammonium carbonate solution in the reaction kettle, and the ammonium carbonate solution is mixed with NH 3 The measured concentration is 80g / L, and the liquid-solid volume-to-mass ratio (L / kg) is 15; after the above-mentioned operation is completed, the airtight reactor is fed into carbon dioxide gas, and the reactor pressure is 0.5MPa, and the reaction temperature is 35°C. Realize the leaching of nickel in the positive electrode material under the conditions, separate the liquid and solid of the reacted material, and obtain the leaching residue and leachate respectively;

[0071] (3) Evaporate the leaching s...

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Abstract

The invention provides a method for cleanly recycling nickel and / or cobalt from a positive electrode material. The method comprises the following steps: (1) reducing the nickel and / or cobalt in the positive electrode material to obtain a reduction material; (2) mixing the reduction material and an ammoniacal solution in a closed container, leaching under the condition that the pressure of carbon dioxide gas is 0.2 to 1.0 MPa and then performing first solid-liquid separation to obtain leaching residues and leaching liquid; and (3) performing aftertreatment on the leaching liquid to obtain the nickel and / or cobalt. By the method, the leaching rate of the nickel and / or cobalt in the positive electrode material is high, the obtained nickel and / or cobalt has low impurity content, the process condition is mild, the flow is simple, the process is clean, and the obtained nickel / cobalt can be used for preparing the positive electrode material of a battery.

Description

technical field [0001] The invention belongs to the technical field of resource recovery, and relates to a method for recovering nickel and / or cobalt in positive electrode materials, in particular to a method for cleaning and recovering nickel and / or cobalt in positive electrode materials. Background technique [0002] With the development of the new energy vehicle industry, the power battery industry for new energy vehicles is growing rapidly. At the same time, about 15wt% of the total power batteries are scrapped every year. It is expected that the climax of power battery scrapping will be ushered in the near future, and a large number of waste batteries will inevitably face a situation that cannot be disposed of. If waste batteries are not disposed of safely, it will cause great harm to the environment and public safety. The current conventional practice is mainly to recycle the metal element in the outer skin and the positive and negative current collectors after the ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C22B3/00
CPCC22B23/0446H01M10/54Y02P10/20Y02W30/84
Inventor 张洋郑诗礼李平周宏明张敏王晓健范兵强王宏岩
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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