公开(公告)号：US20130287621A1

公开(公告)日：2013-10-31

申请号：US13927428

申请日：2013-06-26

Applicant: DOWA ECO-SYSTEM Co., Ltd.

Inventor： Koji FUJITA ,  Satoshi KAWAKAMI ,  Yoshihiro HONMA ,  Ryoei WATANABE

IPC: C22C19/07 ,  C22B3/00 ,  C22B23/00

CPC classification number: C22C19/07 ,  C22B7/007 ,  C22B23/005 ,  C22B23/04 ,  C22B23/0407 ,  H01M10/0525 ,  H01M10/54 ,  Y02P10/234 ,  Y02T10/7011 ,  Y02W30/84

Abstract: A method for recovering a valuable material from a lithium-ion secondary battery, the method contains: roasting a lithium-ion secondary battery containing a valuable material in a metal battery case thereof to obtain a roasted material; stirring the roasted material with liquid to separate contents containing the valuable material from the inside of the metal battery case; and sorting the contents separated by the separation and the metal battery case to obtain a recovered material containing the valuable material.

Abstract translation: 一种从锂离子二次电池中回收有价值的材料的方法，该方法包括：在其金属电池壳体中焙烧含有贵重材料的锂离子二次电池以获得焙烧材料; 用液体搅拌焙烧的物料，将含有贵重物质的内容物从金属电池盒的内部分离; 并分离由分离物和金属电池壳体分离的内容物，以获得含有有价物质的回收材料。

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.

公开(公告)号：US20210210807A1

公开(公告)日：2021-07-08

申请号：US16733537

申请日：2020-01-03

Applicant: DOWA ECO-SYSTEM CO., LTD.

Inventor： Chihiro NISHIKAWA ,  Yoshihiro HONMA ,  Norio NAKAJIMA

IPC: H01M10/54 ,  H01M10/0525 ,  H01M2/02 ,  H01M4/587 ,  H01M4/66 ,  B03C1/30 ,  B02C23/10

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.

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：US20230083016A1

公开(公告)日：2023-03-16

申请号：US17797548

申请日：2021-01-29

Applicant: DOWA ECO-SYSTEM CO., LTD.

Inventor： Tatsuya YODOSE ,  Ryoei WATANABE ,  Hitoshi SASAKI ,  Chihiro NISHIKAWA ,  Yoshihiro HONMA

IPC: B03B9/06 ,  H01M10/54 ,  H01M50/119 ,  B03C1/00 ,  B07B7/01 ,  B09B3/35

Abstract: Provided is a sorting method for valuable resources, including a thermal treatment step of thermally treating a target containing valuable resources, to melt aluminum and separate a melt, a pulverizing step of pulverizing a thermally treated product remaining after the melt is separated, to obtain a pulverized product, a magnetic sorting step of sorting the valuable resources from the pulverized product by a magnetic force, and a wind force sorting step of sorting one valuable resource from another valuable resource in the valuable resources by a wind force.

公开(公告)号：US20220396852A1

公开(公告)日：2022-12-15

申请号：US17772041

申请日：2020-09-10

Applicant: DOWA ECO-SYSTEM CO., LTD.

Inventor： Chihiro NISHIKAWA ,  Yoshihiro HONMA ,  Ryoei WATANABE

IPC: C22B26/12 ,  C22B3/06 ,  C22B3/22 ,  C22B3/44 ,  H01M10/54

Abstract: Provided is a method for separating lithium from a lithium solution containing lithium by 200 mg/L or more and fluorine by 20 mg/L or more, the method including: a first removal step of adding a first component, which solidifies the fluorine contained in the lithium solution, to the lithium solution and removing the fluorine solidified to obtain a F-removed liquid; and a second removal step of adding a second component, which solidifies the first component remaining in the F-removed liquid, to the F-removed liquid and removing the first component solidified to obtain a first component-removed liquid.

公开(公告)号：US20210210806A1

公开(公告)日：2021-07-08

申请号：US16733525

申请日：2020-01-03

Applicant: DOWA ECO-SYSTEM CO., LTD.

Inventor： Chihiro NISHIKAWA ,  Yoshihiro HONMA ,  Norio NAKAJIMA

IPC: H01M10/54 ,  H01M10/0525 ,  H01M4/66 ,  H01M4/587 ,  H01M2/02 ,  B03C1/28 ,  B03C1/10 ,  B02C23/10 ,  B02C23/20

Abstract: There is provided a means capable of recovering a valuable material such as cobalt and nickel, with a low grade of a metal derived from a negative electrode current collector, a low grade of fluorine, and a low grade of a material derived from a negative electrode active material. A method for recovering a valuable material from a lithium ion secondary battery, is characterized in that it 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 classification step of classifying a crushed object obtained through the crushing step into a coarse particle product and a fine particle product; and a wet magnetic separation step of performing wet magnetic separation on the fine particle product obtained through the classification step.

公开(公告)号：US20240387892A1

公开(公告)日：2024-11-21

申请号：US18565244

申请日：2022-06-16

Applicant: DOWA ECO SYSTEM CO., LTD. ,  AKITA UNIVERSITY

Inventor： Tatsuya YODOSE ,  Ryoei WATANABE ,  Yoshihiro HONMA ,  Seiji KUMAGAI

IPC: H01M10/54 ,  C01G53/00 ,  C22C29/12 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

Abstract: There is provided a recycled cathode material precursor, including: a metal element α consisting of at least one of nickel, cobalt and manganese; and a metal element β consisting of at least one of iron, copper and aluminum, wherein a content of the metal element β is 0.5 to 20% by mass in the recycled cathode material precursor.

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.