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:
Oct. 01, 2024
Filed:
Jan. 03, 2020
Dowa Eco-system Co., Ltd., Tokyo, JP;
DOWA ECO-SYSTEM CO., LTD., Tokyo, JP;
Abstract
A method for recovering a valuable material from a lithium ion secondary battery includes: a heat treatment step of performing heat treatment on a lithium ion secondary battery; a crushing step of crushing a heat-treated object obtained through the heat treatment step; a first stage of classification step of classifying a crushed object obtained through the crushing step based on a classification point of 1.2 to 2.4 mm, and a second stage of classification step of classifying an intermediate product and a fine particle product obtained on a fine side in the first stage of classification step based on a classification point of 0.3 mm or less; and a dry magnetic separation step of repeating one time or more a step of performing dry magnetic separation on an intermediate product obtained on a coarse side in the second stage of classification step and performing dry magnetic separation again.