公开(公告)号：US20240243381A1

公开(公告)日：2024-07-18

申请号：US18561768

申请日：2022-03-01

Applicant: DOWA ECO-SYSTEM CO., LTD.

Inventor： Masataka YAMASHITA ,  Yoshihiro HONMA ,  Chihiro NISHIKAWA ,  Jiahao LIU ,  Shota TAHATA ,  Changzhi LIU

IPC: H01M10/54 ,  C22B1/02 ,  C22B7/00

CPC classification number: H01M10/54 ,  C22B1/02 ,  C22B7/005

Abstract: A method of separating valuable materials. The method includes a heat treatment step of performing a heat treatment on a lithium-ion secondary battery including valuable materials, a crushing step of crushing a heat-treated product obtained in the heat treatment step, and a classification step including a first classification step of classifying a crushed product obtained in the crushing step into a coarse-particle product and an intermediate product at a classification cut-point of 0.6 mm or greater and 2.4 mm or less, and a second classification step of classifying the intermediate product into a medium-particle product and a fine-particle product at a classification cut-point of 40 μm or greater and 300 μm or less.

公开(公告)号：US20230119544A1

公开(公告)日：2023-04-20

申请号：US17908740

申请日：2021-03-01

Applicant: DOWA ECO-SYSTEM CO., LTD.

Inventor： Ryoei WATANABE ,  Yoshihiro HONMA ,  Chihiro NISHIKAWA ,  Masataka YAMASHITA ,  Jiahao LIU

IPC: C22B23/02 ,  H01M10/54 ,  C22B1/00

Abstract: Provided is a method for concentrating a valuable metal contained in a lithium ion secondary battery, for processing a lithium ion secondary battery containing at least one element selected from the group consisting of cobalt and nickel, or a positive electrode material of the lithium ion secondary battery, to concentrate a valuable metal containing either or both of cobalt and nickel. The method includes a thermal treatment step of thermally treating the lithium ion secondary battery or the positive electrode material thereof, to form a granular aggregate containing at least one valuable metal selected from the group consisting of cobalt and nickel.