Method for recycling lithium in waste lithium-ion batteries with reduction roasting-water quenching method

A technology of lithium-ion battery and water quenching method, which is applied in battery recycling, recycling technology, recycling by waste collectors, etc., can solve problems such as complex process, complex process, and increased cost, and achieve simple process and solve process Complex and beneficial to industrialization

Inactive Publication Date: 2019-06-14
广西银亿新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(1) Patent CN 201611186511.2 added chlorine-containing polymer auxiliary materials, such as polyvinyl chloride and polypropylene, etc. in the process of recovering lithium, and then carried out ball mill mixing, which made the process complicated
(2) Patent CN201711355295.4 uses sulfuric acid solution to impregnate the roasted electrode material to obtain acid leaching solution, extract and separate Li from the leaching solution with PC-88A, add carbonate to the extracted water phase, filter and separate to obtain Li 2 CO 3 product, this method has a complex process and a long cycle
(3) Paten

Method used

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  • Method for recycling lithium in waste lithium-ion batteries with reduction roasting-water quenching method

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Effect test

Embodiment 1

[0023] Discharge the waste lithium manganate battery and then mechanically crush and sort to obtain positive electrode waste powder; mix the positive electrode waste powder and graphite negative electrode powder evenly to obtain a mixture, and the amount of graphite negative electrode powder added is 30% of the mass of the positive electrode waste powder; mix the mixture Put it into a muffle furnace for reduction roasting; the roasting temperature is 800°C, and the roasting time is 30 minutes; the mixture after reduction roasting is quickly put into water for water quenching, and the water quenching time is 5 minutes, and the lithium in the mixture enters the water to obtain a lithium-rich solution. Lithium is effectively separated from other materials by filtration. The recovery rate of lithium in waste lithium manganate batteries is 93%.

Embodiment 2

[0025] Discharge the waste lithium cobalt oxide battery and then mechanically crush and sieve to obtain the positive electrode waste powder; mix the positive electrode waste powder and charcoal evenly to obtain a mixture, and the amount of charcoal added is 40% of the mass of the positive electrode waste powder; put the mixture into the muffle Reduction roasting is carried out in the furnace; the roasting temperature is 1000°C, and the roasting time is 60 minutes; the mixture after reduction roasting is quickly put into water for water quenching, and the water quenching time is 20 minutes, and the lithium in the mixture enters the water to obtain a lithium-rich solution. It is effectively separated from other materials. The recovery rate of lithium in waste lithium cobalt oxide batteries is 96%.

Embodiment 3

[0027] Discharge the waste nickel-cobalt lithium manganate ternary battery and then mechanically crush and screen to obtain positive electrode waste powder; uniformly mix the positive electrode waste powder and activated carbon to obtain a mixture, and the amount of activated carbon added is 50% of the mass of the positive electrode waste powder; mix the mixture Put it into a muffle furnace for reduction roasting; the roasting temperature is 1200°C, and the roasting time is 180 minutes; the mixture after reduction roasting is quickly put into water for water quenching, and the water quenching time is 30 minutes. The lithium in the mixture enters the water to obtain a lithium-rich solution. Lithium is effectively separated from other materials by filtration. The recovery rate of lithium in the waste nickel-cobalt-lithium manganese oxide ternary battery is 98%.

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Abstract

The invention relates to a method for recycling lithium in waste lithium-ion batteries with a reduction roasting-water quenching method, and belongs to the technical field of waste battery recovery. The method includes the following steps that the waste lithium-ion batteries are subjected to mechanical crushing and screening after being discharged so that positive electrode waste powder can be obtained; the positive electrode waste powder and a reducing agent are evenly mixed to obtain a mixture; the mixture is subjected to reduction roasting; and the mixture subjected to reduction roasting isthrown into water quickly for water quenching, lithium in the mixture enters the water to obtain a lithium-rich solution, and the recovery rate of the lithium in the waste lithium-ion batteries is 92%-98%. By adoption of the method, the lithium in the waste lithium-ion batteries can be efficiently and selectively separated, the technological process is simple, operation is convenient, and the problems that prior technological processes are complex, and investment cost and recovery cost are high are solved.

Description

technical field [0001] The invention belongs to the technical field of recycling waste batteries, and in particular relates to a method for recovering lithium in waste lithium-ion batteries by a reduction roasting-water quenching method. Background technique [0002] Lithium-ion batteries have rapidly occupied the power source market of portable electronic and electrical equipment since their commercialization due to their significant advantages such as high voltage, large specific capacity, long life and no memory effect. Since 2010, the new energy automobile industry has grown rapidly, and the output of lithium-ion power batteries has increased year by year. The service life of power lithium-ion batteries is 5-8 years, and about 15% of the total power batteries are scrapped every year. According to relevant industry data, by 2020, the amount of scrapped power lithium-ion batteries in my country will reach about 500,000 tons; by 2023, the scrapped amount will reach about 1...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B1/02C22B26/12H01M10/54
CPCY02P10/20Y02W30/84
Inventor 王海王佳东王泽强吴继崇韦造乐
Owner 广西银亿新材料有限公司
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