公开(公告)号：US20230318063A1

公开(公告)日：2023-10-05

申请号：US18024825

申请日：2021-09-03

Applicant: DOWA ECO-SYSTEM CO., LTD.

Inventor： Yoji SUGANUMA ,  Hiroki NAGAHARA ,  Minoru YOSHIHARA ,  Chihiro NISHIKAWA ,  Ryoei WATANABE ,  Yoshihiro HONMA ,  Masataka YAMASHITA

IPC: H01M10/54 ,  C22B21/00 ,  C22B7/00 ,  C22B15/00 ,  B09B3/40

CPC classification number: H01M10/54 ,  C22B21/0092 ,  C22B7/005 ,  C22B15/0013 ,  B09B3/40

Abstract: A method for recovering a valuable substance is provided. The method includes: a thermal treatment step of thermally treating a target containing a valuable substance while supporting a target storing unit, in which the target is stored, by a supporting unit that can support the target storing unit, wherein the thermally treating includes heating a gas present in a region, in which the supporting unit is positioned, by a flame for thermally treating the target such that the target storing unit is not contacted by the flame; and a valuable substance recovering step of recovering the valuable substance from a thermally treated product of the target obtained in the thermal treatment step.

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：US20230366061A1

公开(公告)日：2023-11-16

申请号：US18025490

申请日：2021-09-07

Applicant: DOWA ECO-SYSTEM CO., LTD.

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

IPC: C22B15/00 ,  H01M10/54 ,  C22B1/24 ,  C22B7/00

CPC classification number: C22B15/0056 ,  H01M10/54 ,  C22B1/24 ,  C22B7/003

Abstract: A method for recovering a valuable substance is provided. The method includes a thermal treatment step of thermally treating a target containing a valuable substance using a continuous furnace configured to thermally treat the target while moving a target storing unit, in which the target is stored, such that the target storing unit is not contacted by a flame that is for thermal treatment, and a valuable substance recovering step of recovering the valuable substance from a thermally treated product of the target obtained in the thermal treatment step.

公开(公告)号：US20230323506A1

公开(公告)日：2023-10-12

申请号：US18025485

申请日：2021-09-07

Applicant: DOWA ECO-SYSTEM CO., LTD.

Inventor： Chihiro NISHIKAWA ,  Yoshihiro HONMA ,  Ryoei WATANABE ,  Masataka YAMASHITA ,  Youichi FUKUCHI ,  Tomotaka IZUMI ,  Yoshiki ITO

IPC: C22B9/22 ,  H01M10/54 ,  C22B15/00

CPC classification number: C22B9/22 ,  H01M10/54 ,  C22B15/0056 ,  C22B15/0095

Abstract: A method for recovering a valuable substance is provided. The method includes a thermal treatment step of thermally treating a target, which contains a valuable substance and is stored in a target storing unit, via a flame blocking unit configured to block a flame for thermally treating the target such that the target storing unit is not contacted by the flame, and a valuable substance recovering step of recovering the valuable substance from a thermally treated product of the target obtained in the thermal treatment step.

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.

公开(公告)号：US20230411719A1

公开(公告)日：2023-12-21

申请号：US18025498

申请日：2021-09-07

Applicant: DOWA ECO-SYSTEM CO., LTD.

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

IPC: H01M10/54 ,  C22B7/00 ,  C22B15/00

CPC classification number: H01M10/54 ,  C22B7/005 ,  C22B15/0004

Abstract: A method for recovering a valuable substance from a lithium ion secondary battery is provided. The method includes a thermal treatment step of thermally treating a lithium ion secondary battery containing aluminum, carbon, and a copper foil as constituting materials, and a wet sorting step of applying an external force to a thermally treated product obtained in the thermal treatment step in the presence of a liquid, to sort the thermally treated product into a heavy product and a light product containing copper.