Method for recovering valuable metal from used LIB
AssigneeMitsubishi Materials Corporation
InventorsHajime Kawasaki, Atsuhiro Nabei
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Abstract
This method for recovering a valuable metal from a used LIB includes: a step of adding, to an electrode assembly taken out of a detoxified used LIB, metallic zinc in an excess amount relative to a mass of the electrode assembly; a step of heating a mixture of the electrode assembly and the metallic zinc to form a molten metal; a step of taking out the molten metal and separating the molten metal into an alloy metal and a slag; and a step of heating the alloy metal to volatilize zinc in the alloy metal, and thereby, recovering an alloy metal of a valuable metal.
Claims8
A method for recovering a valuable metal from a used lithium ion secondary battery, LIB, comprising:
- a step of adding, to an electrode assembly taken out of a used LIB, which has been discharged and detoxified, metallic zinc in an amount of 10 times or more by mass relative to an amount of a cathode active material contained in the electrode assembly;
- a step of heating a mixture of the electrode assembly and the metallic zinc to form a molten metal;
- a step of taking out the molten metal and separating the molten metal into an alloy metal and a slag;
- and
- a step of heating the alloy metal to volatilize zinc in the alloy metal, and thereby, recovering an alloy metal of the valuable metal,
- wherein the valuable metal is one or more of copper, nickel, and cobalt.
Dependencies are inferred from the claim text.