Valuable metal recovery method
AssigneeSumitomo Metal Mining Co., Ltd.
InventorsJun-ichi Takahashi, Kazuhiro Mori, Toshirou Tan
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Abstract
Provided is a method for stabilizing the degree of oxidation of molten battery waste, and definitively separating slag and alloy. The method is provided with a pre-oxidation step (ST20) for roasting and oxidizing battery waste; and a drying step (S20) for melting the battery waste oxidized in the pre-oxidation step, and separating and recovering the slag and the valuable metal alloy. By providing the pre-oxidation step (ST20) for oxidizing the battery waste by roasting in advance of the drying step (S20), it is possible to stably obtain the optimal degree of oxidization in a melting step (ST21), and to improve the slag-alloy separation efficiency.
Claims11
A method for recovering a valuable metal from a waste battery, comprising:
- a pre-oxidation step comprising subjecting the waste battery to an oxidation treatment by roasting the waste battery;
- and
- a dry step comprising melting the waste battery after the pre-oxidation step to separate and recover slag and an alloy of valuable metals.
Dependencies are inferred from the claim text.