Study on High-efficient Leaching of Lithium from Clay-type Lithium Ore
Received:March 22, 2021  Revised:March 29, 2021
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DOI:doi:10.3969/j.issn.1007-7545.2021.09.006
KeyWord:clay- type lithium ore;lithium ;roasting;leaching
              
AuthorInstitution
XU Lu 中国地质科学院矿产综合利用研究所
HUI Bo 中国地质科学院矿产综合利用研究所
GONG Da-xing 中国地质科学院矿产综合利用研究所
LAI Yang 中国地质科学院矿产综合利用研究所
TIAN En-yuan 中国地质科学院矿产综合利用研究所
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Abstract:
      Lithium was leached from clay-type lithium ore with Li2O grade of 0.64% by roasting-acid leaching. Effects of roasting time and temperature on Li2O leaching rate were investigated. Effects of leaching temperature and time, sulfuric acid concentration, and ratio of liquid to solid (L/S) on Li2O leaching rate in acid leaching process were investigated by orthogonal test. The results show that Li2O leaching rate is 92.97% under the optimum conditions including roasting time of 30 min, roasting temperature of 600 ℃, leaching temperature of 90 ℃, leaching time of 30 min, sulfuric acid concentration of 1.5 mol/L, and L/S=6.
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