A method for the full recovery of valuable metal elements in the positive pole pieces of waste power lithium batteries
A positive pole piece and metal element technology, which is applied in the field of full recovery of valuable metal elements in the positive pole piece of waste power lithium batteries, can solve the problem of high processing costs, difficult full leaching of valuable elements, and difficult metal state recovery of aluminum collectors and other problems to achieve the effect of reducing the difficulty of impurity removal and reducing the processing cost
Active Publication Date: 2021-02-02
湖南烯富环保科技有限公司
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Problems solved by technology
[0005] Aiming at the problems of high processing cost, difficulty in recovering the aluminum current collector in metal state, and difficulty in leaching out the full amount of valuable elements in the traditional process of treating the positive pole piece of the waste power lithium battery, the purpose of the present invention is to provide a positive pole of the waste power lithium battery A method for the full recovery of valuable metal elements in the pole piece. This method is realized with the assistance of biomass waste. The Al in the positive pole piece is recovered in a metallic state, and Li, Ni, Co and Mn are all recovered in the solution in an ion state.
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Embodiment 1
[0053] Example 1, the recovery of the full amount of valuable metal elements in the positive pole piece of the waste power lithium battery with the assistance of biomass waste corn cob.
[0054] The corn cobs used in this example have been crushed to pass through a 200-mesh sieve before use. The concrete implementation procedure of this embodiment is:
[0055] Process 1:
[0056] Step 1: Add corncobs to a volumetric concentration (V 硫酸 / V 水 ) in 2% dilute sulfuric acid to prepare a slurry with a liquid-solid ratio of 1.2:1. After soaking at room temperature for 12 hours, place the slurry in a closed reaction kettle and keep it warm at 105°C for 30 minutes, then open the discharge of the reaction kettle. Valve, so that the slurry is sprayed and exploded from the reactor to the explosion chamber outside the reactor, and the slurry after hydrothermal treatment is obtained, and the biomass solution S1 and the filter residue are obtained by filtration;
[0057] Step 2: Place th...
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Abstract
The invention discloses a method for full amount recovery of valuable metal elements in an anode piece of a waste power lithium battery. The method includes the steps that in advance, a hydrothermal reaction of biomass under a weak acid condition is carried out, a biomass solution S1 and filter residue are obtained by separation, then the filter residue reacts in an alkaline solution, and a biomass solution S2 is obtained by separation; the waste anode piece is stripped in the biomass solution S2, aluminum metal and anode paste are obtained by separation; and then, the anode paste and the biomass solution S1 are reduced and leached in an acid solution to obtain a leaching solution enriched with Li, Ni, Co and Mn. According to the method, Al is separated as metal, the efficient leaching ofLi, Ni, Co and Mn can be realized, and the full amount recovery of waste ternary materials with low cost and high efficiency can be realized.
Description
technical field [0001] The invention belongs to the technical field of lithium battery recovery, and in particular relates to a method for fully recovering valuable metal elements in positive pole pieces of waste power lithium batteries. Background technique [0002] my country's new energy vehicles are in an important period of rapid development. Power batteries are the core components of new energy vehicles, and lithium-ion batteries are considered to be the most important components of automobiles due to their high energy density, high power density, high cycle life, and environmental friendliness. Power battery is the first choice. With the rapid industrialization of new energy vehicles, their sales will increase by leaps and bounds, and the stock of lithium-ion power batteries will also increase exponentially. At the same time, the problem of environmental pollution of waste lithium-ion power batteries and the problem of rational recycling of resources have become commo...
Claims
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IPC IPC(8): C22B7/00C22B26/12C22B47/00C22B23/00H01M10/0525H01M10/54
CPCC22B7/007C22B23/043C22B26/12C22B47/00H01M10/0525H01M10/54Y02E60/10Y02W30/84Y02P10/20
Inventor 马亚赟杨娟周向阳唐晶晶王辉周昊宸刘晓剑王鹏周进辉周向清周昶猷
Owner 湖南烯富环保科技有限公司
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