Title:
METHOD FOR RECOVERING VALUABLE MATERIALS FROM LITHIUM ION SECONDARY BATTERIES
Document Type and Number:
WIPO Patent Application WO/2024/014144
Kind Code:
A1
Abstract:
Provided is a method for recovering valuable materials from lithium ion secondary batteries, said method comprising: a heat treatment step for obtaining a heat-treated material by subjecting a lithium ion secondary battery to a heat treatment; a first classification step for obtaining a coarse-grain product 1 and a fine-grain product, by crushing the heat-treated material and classifying the resulting crushed material using a classification point from 600 µm to 2,400 µm; a pulverization step for pulverizing the fine-grain product to obtain a pulverized material; a second classification step for obtaining a coarse-grain product 2 and a very fine-grain product 1, by classifying the pulverized material using at least one classification point that is smaller than the classification point in the first classification step and is from 75 µm to 1,200 µm; and a magnetic sorting step for sorting, using magnetic force, the very fine-grain product 1 yielded by the second classification step.
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Inventors:
LIU CHANGZHI (JP)
WATANABE RYOEI (JP)
TAHATA SHOTA (JP)
NISHIKAWA CHIHIRO (JP)
WATANABE RYOEI (JP)
TAHATA SHOTA (JP)
NISHIKAWA CHIHIRO (JP)
Application Number:
PCT/JP2023/019933
Publication Date:
January 18, 2024
Filing Date:
May 29, 2023
Export Citation:
Assignee:
DOWA ECO SYSTEM CO LTD (JP)
International Classes:
H01M10/54; C22B1/02; C22B3/22; C22B7/00; C22B15/00
Domestic Patent References:
| WO2021177200A1 | 2021-09-10 |
Foreign References:
| JP2012153549A | 2012-08-16 | |||
| JP2021501259A | 2021-01-14 | |||
| JP2012079630A | 2012-04-19 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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