Method for recycling nickel-cobalt-manganese-lithium from waste power lithium ion battery black powder

A lithium-ion battery, nickel-cobalt-manganese-lithium technology, which is applied in the field of recycling waste lithium-ion power batteries, can solve problems such as low recovery rate and entrainment loss of lithium elements, so as to reduce recycling cost, improve recycling utilization rate, and scientific recycling process Effect

Active Publication Date: 2020-08-11
XUZHOU GUOMAO VALUABLE & RARE METAL COMPREHENSIVE UTILIZATION INST
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Problems solved by technology

However, when elements such as nickel, cobalt, and manganese are recovered at the front end, some li

Method used

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  • Method for recycling nickel-cobalt-manganese-lithium from waste power lithium ion battery black powder
  • Method for recycling nickel-cobalt-manganese-lithium from waste power lithium ion battery black powder
  • Method for recycling nickel-cobalt-manganese-lithium from waste power lithium ion battery black powder

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] The power lithium-ion battery to be recycled is produced by Shenzhen BAK Battery Co., Ltd. The ternary positive electrode material is nickel-cobalt lithium manganese oxide. The recycling process is as follows: figure 1 As shown, the specific steps are as follows:

[0026] First, soak the power battery in a saturated sodium chloride solution to fully discharge it to remove residual electricity. After discharging, it is dried and disassembled in a fume hood, and then processed by crushing and sorting equipment to obtain a mixture of Battery black powder of positive and negative electrode materials, the black powder mainly includes positive electrode nickel, cobalt, manganese, lithium compounds and negative electrode carbon powder.

[0027] 1.H 2 SO 4 +SO 2 system leaching

[0028] Take 50g of black powder, place it in a wate...

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Abstract

The invention discloses a method for recycling nickel-cobalt-manganese-lithium from waste power lithium ion battery black powder. The method comprises the steps of conducting leaching and filtering through a sulfuric acid and sulfur dioxide system, adding lime milk into filtrate, adjusting the pH to 10-12, controlling precipitation, and conducting filtering to obtain a nickel-cobalt-manganese enriched product and lithium-containing filtrate; conducting purifying and impurity removal on the lithium-containing filtrate, adding a sodium carbonate solution for precipitation of lithium to obtain lithium carbonate; leaching the nickel-cobalt-manganese enriched product through sulfuric acid, adjusting the pH to 4-6, removing impurity iron and aluminum, and conducting solid-liquid separation to obtain purified slag and purified liquid; and adjusting the pH of the purified liquid to 4-5, conducting manganese extraction with P204 as an extraction agent, conducting cobalt extraction with P507 asan extraction agent, and conducting nickel extraction with P507 as an extraction agent. Through the method provided by the invention, the lithium recovery rate is greatly increased; moreover, sodium hydroxide generated from precipitation of lithium can be returned and continuously used in the lime milk nickel-cobalt-manganese enrichment process; and meanwhile, the yield of nickel sulfate, cobalt sulfate and manganese carbonate is increased.

Description

technical field [0001] The invention belongs to the technical field of recycling waste lithium-ion power batteries, and in particular relates to a method for recovering nickel-cobalt-manganese-lithium from waste power lithium-ion battery black powder. Background technique [0002] With the explosive growth of the use of new energy vehicles, waste power lithium-ion batteries will be one of the main solid wastes in my country's cities in the future, but they will also be typical "urban minerals". Lithium-ion batteries contain a large amount of valuable metals. For example, the average content of lithium, nickel, and cobalt in the nickel-cobalt lithium manganate ternary positive electrode material is 1.9%, 12.1%, and 2.3%; It reached 13.3% and 12.7%. The content of these metals is even much higher than that in the ore, which is of great recycling value. At the same time, the recycling of waste power batteries also reduces the pressure of environmental pollution, which has dua...

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Application Information

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IPC IPC(8): C22B7/00C22B23/00C22B26/12C22B47/00H01M10/54
CPCC22B7/007C22B7/006C22B26/12C22B47/00C22B23/0453H01M10/54Y02W30/84
Inventor 张邦胜刘贵清王芳张帆解雪曲志平刘昱辰
Owner XUZHOU GUOMAO VALUABLE & RARE METAL COMPREHENSIVE UTILIZATION INST
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