Title:
METHOD FOR RECOVERING WASTE LITHIUM BATTERY SLURRY
Document Type and Number:
WIPO Patent Application WO/2023/005429
Kind Code:
A1
Abstract:
A method for recovering waste lithium battery slurry, comprising: adding calcium oxide to waste lithium battery slurry and stirring in a negative pressure environment, so as to separate a solid phase and a liquid phase, then performing low acid treatment and filtration on the obtained solid phase to obtain a battery powder. The large amount of heat released by the reaction of calcium oxide and water is used to provide conditions for the evaporation of NMP and water, the evaporation of NMP and water at a low boiling point being achieved by means of negative-pressure vacuum evaporation. NMP can be recovered by by means of condensation. The solid phase is directly subjected to wet processing, and battery powder is regenerated by means of impurity removal and precipitation. In the recovery method, since the slurry does not need to be heated by an external heat source, energy consumption is reduced to a certain extent. Moreover, the recovery method is simple and efficient to operate, reduces environmental pollution and has certain industrial application prospects.
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Inventors:
NING PEICHAO (CN)
LI CHANGDONG (CN)
RUAN DINGSHAN (CN)
ZHOU YOU (CN)
LI QIANG (CN)
CHEN SONG (CN)
LI CHANGDONG (CN)
RUAN DINGSHAN (CN)
ZHOU YOU (CN)
LI QIANG (CN)
CHEN SONG (CN)
Application Number:
PCT/CN2022/097175
Publication Date:
February 02, 2023
Filing Date:
June 06, 2022
Export Citation:
Assignee:
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP EV RECYCLING CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP EV RECYCLING CO LTD (CN)
International Classes:
H01M10/54
Foreign References:
| CN113764759A | 2021-12-07 | |||
| KR101831260B1 | 2018-02-22 | |||
| CN111848350A | 2020-10-30 | |||
| CN103898328A | 2014-07-02 | |||
| CN108963371A | 2018-12-07 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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