The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 2015
Filed:
Feb. 15, 2012
Jun-ichi Takahashi, Ehime, JP;
Kazuhiro Mori, Ehime, JP;
Toshirou Tan, Ehime, JP;
Sumitomo Metal Mining Co. Ltd, Tokyo, JP;
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 (ST) for roasting and oxidizing battery waste; and a drying step (S) 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 (ST) for oxidizing the battery waste by roasting in advance of the drying step (S), it is possible to stably obtain the optimal degree of oxidization in a melting step (ST), and to improve the slag-alloy separation efficiency.