Technology for recycling valuable metal from electric core of waste tertiary power battery

Abstract

The invention discloses a technology for recycling valuable metal from an electric core of a waste tertiary power battery. The technology comprises the following steps of (1) shearing and crushing theelectric core under the water protection condition, and enabling electrolyte to enter into water; (2) washing the crushed electric core fragments in a water tank, removing a diaphragm, and further washing to remove electrolyte residue; (3) filtering the electric core fragments after water washing, performing ball milling, and separating tertiary material and graphite from a copper coil and an aluminum coil; (4) enabling a screen net to screen the copper coil and the aluminum coil; performing gravity sorting on the matters under the screen by a rocking bed to remove graphite, so as to obtain tertiary alloy residue; (5) recycling the shearing, crushing and washing water for multiple times, separating out lithium by a precipitation method, and sending into a water treatment plant to treat and recycle. The technology has the advantage that the difference between physical properties of the tertiary material and other components in the power battery is utilized, the environment-friendly physical sorting technology is adopted, the usable components are gradually separated, and the electrolyte is simultaneously treated, so that all valuable metal elements in the tertiary power battery canbe recycled.

Description

technical field [0001] The invention relates to a process for recovering valuable metals in waste ternary power battery cells. Background technique [0002] With the increasing shortage of global resources and the urgent need for environmental protection, the number of electric vehicles is increasing year by year. At present, the power batteries used in new electric vehicles are mainly ternary lithium-ion power batteries, and ternary lithium-ion power batteries refer to nickel-cobalt lithium 2 ) Lithium-ion batteries with ternary materials as the positive electrode have a service life of about 5-8 years. It is estimated that by 2020, the total amount of waste power batteries will exceed 120,000 tons. The existing waste lithium-ion battery treatment methods are mainly for small lithium cobalt oxide batteries, or the fire method is used, or the electrolyte cannot be processed and recovered, which consumes a lot of energy and is prone to secondary pollution. Therefore, a mor...

AI Technical Summary

Problems solved by technology

The existing waste lithium-ion battery treatment methods are mainly for small lithium cobalt oxide batteries, or use the fire method, or cannot process and recycle the electrolyte, which consumes a lot of energy and is prone to secondary pollution

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