Separation method for different magnetic metals in waste lithium ion batteries

Abstract

The invention discloses a separation method for different magnetic metals in waste lithium ion batteries, which comprises the steps of first putting the electrode powder obtained by screening the waste lithium ion batteries in a high temperature furnace, and after vacuumizing the high temperature furnace with operation of a vacuum pump, acquiring a first powder mixture; and with a compound separation method of wind force and magnetic force, screening the first powder mixture to obtain a first magnetic metal powder and a first nonmagnetic powder; then processing the first nonmagnetic powder byusing the same method to obtain a second magnetic metal powder and a second nonmagnetic powder; and in the end, processing the second nonmagnetic powder by using the same method to obtain a third magnetic metal powder and a third nonmagnetic powder. Adoption of the technical scheme disclosed by the invention can effectively separate a mixture of different kinds of magnetic metal oxides, reduce theaddition of chemical reagents and avoid the generation of wastewater.

Description

technical field [0001] The invention relates to the technical field of battery recycling, in particular to a method for separating different magnetic metals in waste lithium ion batteries. Background technique [0002] As a representative of modern high-energy batteries, lithium-ion batteries have been widely used in consumer electronic devices since the 1990s, such as mobile phones, notebook computers, and power banks. In recent years, with the acceleration of the replacement of consumer electronics products, the generation of waste lithium-ion batteries is also faster and faster. In 2015, there were more than 5,000 mobile power manufacturers of different sizes in China. According to forecasts, by 2020, my country will produce 528,100 tons of waste lithium-ion batteries, and the number of produced batteries will reach 264.06 million. The metal content in such a huge amount of waste lithium-ion batteries is very large. According to statistics, the value of metal resources ...

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional technologies for processing lithium-ion battery electrode materials mainly focus on chemical leaching, precipitation, electrochemical and solvent extraction to recover and enrich magnetic metals. They have disadvantages such as adding a large amount of chemical reagents and generating acid-base wastewater, such as Patent No. CN107293820A, CN107267759A, CN101921917A and other patents

However, the existing technology not only uses a large amount of chemical reagents and solutions, resulting in a large amount of waste water, but also cannot effectively separate mixed oxides with different types of magnetic metals.

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