Title:
RECOVERY METHOD FOR SPENT LITHIUM BATTERY MATERIALS
Document Type and Number:
WIPO Patent Application WO/2024/000818
Kind Code:
A1
Abstract:
Disclosed in the present invention is a recovery method for spent lithium battery materials. The recovery method comprises the following steps: (1) subjecting a battery powder obtained by disassembling cells of spent lithium batteries to ammonia leaching, and performing solid-liquid separation to obtain a leachate and filter residues; (2) adding a fluorine-phosphorus precipitating agent to the leachate obtained in step (1), and performing solid-liquid separation to obtain a filtrate in which fluorine-phosphorus residues are removed; (3) subjecting the filtrate obtained in step (2) to ammonia distillation and solid-liquid separation to obtain a filtrate and filter residues containing basic cupric carbonate and lithium carbonate; (4) washing the filter residues obtained in step (3) with water, and separating the basic cupric carbonate to obtain washing water containing lithium carbonate; and (5) subjecting the filter residues obtained in step (1) to reduction roasting, then washing same, adding the washing water obtained in step (4) thereto, extracting lithium by means of water leaching, and filtering same to obtain a lithium-extracted filtrate. The method can recover valuable metal in spent lithium battery materials without extraction, and thus improves the recovery rate of the valuable metal.
Inventors:
CHEN XINGEN (CN)
CAO LEIJUN (CN)
HE RAN (CN)
LI LIANG (CN)
TANG HONGHUI (CN)
LI CHANGDONG (CN)
CAO LEIJUN (CN)
HE RAN (CN)
LI LIANG (CN)
TANG HONGHUI (CN)
LI CHANGDONG (CN)
Application Number:
PCT/CN2022/118012
Publication Date:
January 04, 2024
Filing Date:
September 09, 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:
C22B26/12; C22B7/00; C22B15/00; C22B21/00; C22B23/00; C22B47/00
Foreign References:
| CN107017443A | 2017-08-04 | |||
| CN112158894A | 2021-01-01 | |||
| EP2669390A1 | 2013-12-04 |
Other References:
XIANWU YI: "Current Situation and Development Overview of Copper Hydrometallurgy Technology (Continued)", NONFERROUS METALS (EXTRACTIVE METALLURGY), vol. 8, 1 May 1977 (1977-05-01), pages 50 - 54, XP093121974
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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