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Metal Mine ›› 2018, Vol. 47 ›› Issue (11): 185-188.

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Experiment of Flotation Recovery and Leaching of Lithium from a Tungsten Tailings in Ganzhou

Wang Wei1,2,3,4 ，Chang Xueyong1,2,3,4 ，Liu Lin1,2,3,4 ，Liu Hongzhao1,2,3,4 Cao Yaohua1,2,3,4 ，Zhang Bo1,2,3,4 ，Wang Hongliang1,2,3,4 ，Zhao Hengqin1,2,3,4   

  1. 1. Zhengzhou Institute of Multipurpose Utilization of Mineral Resources， Zhengzhou 450006，China；2. Key Laboratory of Evaluation and Multipurpose Utilization of Polymetallic Ore， Ministry of Land and Resources，Zhengzhou 450006，China；3. Key Laboratory of Gold Resource Comprehensive Utilization in Henan Province， Zhengzhou 450006，China；4. China National Engineering Research Center for Comprehensive Utilization of Non-metallic Minerals， Zhengzhou 450006， China
  • Online:2018-11-15 Published:2018-12-19

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Abstract: A tungsten tailings in Ganzhou contains 0.34% Li2O， the lithium is mainly contained in the mica. The flotation process conditions and lithium flotation concentrate roasting-leaching process conditions were studied to determine the lithium recovery and utilization process. The results showed that a lithium concentrate could be gotten with the Li2O grade 1.18% and lithium recovery rate 58.69% through the flotation process of one roughing three cleaning three scavenging and middlings returned to the flowsheet in turn closed circuit. The lithium reaching rate could reach to 98.80% while the leaching conditions were flotation lithium concentrate mixed with chlorinating agent (the mass ratio of calcium chloride to sodium chloride is 1∶1) by mass ratio 1∶0.6 ， roasting 1 h at 900 ℃， leaching 2 hours at 50 ℃， the ratio of liquid to roasting product 1.5∶1. Therefore， the flotation-chlorination roasting-leaching process could realize the comprehensive recovery of lithium from the tungsten tailings in Ganzhou.

Key words: Lithia mica, Flotation, Chlorination roasting, Leaching