Title:
リチウムの回収方法
Document Type and Number:
Japanese Patent JP6770676
Kind Code:
B2
Abstract:
A method for recovering lithium from low-content extraction tailwater and recycling extraction tailwater is provided. The disclosure is characterized that recovery of lithium from lithium-containing extraction tailwater is achieved by adding calcium to remove fluorine, carrying out evaporative crystallization and precipitating lithium salts. Recycle of extraction tailwater is achieved by adopting the following steps: in the lithium-containing extraction tailwater, adding calcium to remove fluorine, carrying out evaporative crystallization, recovering condensate water, precipitating a lithium salt and recycling mother liquor. According to the disclosure, lithium is recovered from low-content extraction tailwater via enrichment and sodium sulfate and distilled water therein are incidentally recovered, so that zero release of battery waste treatment wastewater is achieved.
Inventors:
Liu Kunhei
Ouyo Ken
Liu Sweep
Ouyo Ken
Liu Sweep
Application Number:
JP2018568861A
Publication Date:
October 21, 2020
Filing Date:
September 27, 2017
Export Citation:
Assignee:
Hunan Kingen New Material Co., Ltd.
International Classes:
C22B26/12; C22B3/44; C22B7/00; C22B9/02; C22B9/10; H01M6/52; H01M10/54
Domestic Patent References:
| JP2016149330A |
Foreign References:
| WO2016054683A1 | ||||
| CN102099296A | ||||
| CN104105803A |
Attorney, Agent or Firm:
Koji Tsubouchi