Title:
METHOD FOR PROCESSING WASTE LITHIUM ION BATTERY
Document Type and Number:
WIPO Patent Application WO/2022/230861
Kind Code:
A1
Abstract:
With respect to recovery of a valuable metal from a waste lithium ion battery (LiB) and a waste material from the LiB production, the purpose of the present invention is to solve: the problem of recovering a valuable metal from an active material powder that is obtained by subjecting the waste LiB and the waste material from the LiB production to a pretreatment (discharging, heat treatment, pulverization and classification); and the problem of recovering and circulating carbon dioxide. A method for processing a waste lithium ion battery according to the present invention is characterized by comprising: a step in which an active material powder is obtained by subjecting a waste lithium ion battery to operations such as discharging, heat treatment, pulverization and classification; a combustion step in which the carbon content in the active material powder is combusted so as to be converted into carbon dioxide; a carbon dioxide recovering step in which the carbon dioxide generated during the combustion of the active material in the combustion step is absorbed and carbonated; a wet treatment step in which the active material powder combusted in the combustion step is wet dissolved, thereby forming a solution of a valuable metal in the active material; and a lithium carbonation step in which lithium carbonate is obtained by adding carbon dioxide, which has been absorbed in the carbon dioxide recovering step, into a lithium solution.
Inventors:
YAMADA KEITA (JP)
SAKUMA YUKIO (JP)
HIRAOKA TARO (JP)
NAKAZAWA JUN (JP)
SAKUMA YUKIO (JP)
HIRAOKA TARO (JP)
NAKAZAWA JUN (JP)
Application Number:
PCT/JP2022/018849
Publication Date:
November 03, 2022
Filing Date:
April 26, 2022
Export Citation:
Assignee:
ASAKA RIKEN CO LTD (JP)
International Classes:
C22B3/04; C22B26/12; C22B3/44; C22B7/00; H01M10/54
Foreign References:
| JP2012229481A | 2012-11-22 | |||
| JPH06263433A | 1994-09-20 | |||
| JP2004352587A | 2004-12-16 |
Attorney, Agent or Firm:
SATO & ASSOCIATES (JP)
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