Method for recovering metal from used it ion cell

Abstract

The invented method includes the physical separation method combining with the preparation procedure of the cleaning wet recycle, providing the features of simple and high purity of the recovered metal. The invention includes following steps. With the disused lithium ion cells being burned in the high-temperature furnace, the organic dielectric is removed. After the smashing and sieving treatment, the oversize material is processed through the magnetic separation and the eddy current sorting so as to obtain the iron case, copper foil and aluminium foil etc. The undersize is processed through the steps of corrosion, filtering and electrolysis so as to obtain copper and cobalt. With carbonic acid radical being added to the solution richen in lithium ion, the high purity carbonate of lithiumis formed so as to recovery lithium.

Description

technical field [0001] The invention relates to a method for recovering metals from waste lithium ion batteries, in particular to a method for recovering copper, aluminum, iron and cobalt metals, and lithium carbonate from waste lithium ion batteries. Background technique [0002] Due to its high energy density, high working voltage, long cycle life and no memory effect, lithium-ion batteries have been recognized as the battery system with the most development potential. At present, in addition to being widely used in various 3C products are on the market, and are expected to replace lead-acid, nickel-cadmium and nickel-metal hydride batteries as the power source of electric vehicles in the future. By then, the usage of lithium-ion batteries will grow exponentially. Therefore, when the use of lithium-ion batteries is increasing day by day, it is indeed necessary to develop a beneficial waste lithium-ion battery recycling and regeneration system to solv...

AI Technical Summary

Problems solved by technology

However, it is well known that the grades of the metals obtained by sorting by physical properties are not high. Except for the satisfactory results of iron recovery by magnetic separation, generally speaking, there are still inherent limitations for other recovered metals, which cannot be achieved as wet High-grade metal products can be obtained by metallurgy. In addition to the fact that the identification rate of physical properties of many metals is not high (such as aluminum and copper in this system), the absolute value of the magnetic or electrical properties of the crushed particles is closely related to the particle size.

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