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:
Jul. 02, 2024
Filed:
Jul. 11, 2019
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Yu Yamashita, Niihama, JP;
Ryo Togashi, Niihama, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
Provided is a more efficient dry refining process for improving the recovery rate of phosphorus-free valuable metals from waste lithium ion batteries. The present invention provides a method for recovering valuable metals from waste lithium ion batteries, said method comprises a melting step Sfor melting the waste lithium ion batteries and obtaining a molten substance and a slag separation step Sfor separating slag from the molten substance and recovering an alloy containing valuable metals, wherein in the melting step, flux containing a calcium compound is added to the waste lithium ion batteries such that the mass ratio between silicon dioxide and calcium oxide in the slag becomes 0.50 or less and the mass ratio between calcium oxide and aluminum oxide falls in the range of 0.30 to 2.00.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile