Gu Jihan, Liang Binjun, Luo Xianping, Yuan Weiquan, Xiao Bin, Tang Xuekun
School of Resource and Environment Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China.
Ganzhou Innovative Center for Clean and Efficient Utilization Technologies of Recalcitrant Solid Resources, School of Resources and Civil Engineering, Gannan University of Science and Technology, Ganzhou 341000, China.
Molecules. 2025 May 21;30(10):2244. doi: 10.3390/molecules30102244.
A complex salt roasting-water leaching process was developed and optimized for the efficient extraction of lithium (Li), rubidium (Rb), and cesium (Cs) from lepidolite. The effects of roasting parameters (temperature, time, and complex salt composition) and leaching parameters (temperature, time, and liquid-solid ratio) were systematically investigated. Optimal roasting conditions were found to be 900 °C for 60 min with a complex salt composition of Lepidolite:NaSO:CaCl:CaCO = 1:0.5:0.3:0.05, while optimal leaching conditions were 60 °C, 60 min, and a liquid-solid ratio of 3:1, achieving the highest leaching efficiencies of 94.60%, 83.33%, and 82.95% for LiO, RbO, and CsO, respectively. XRD and SEM characterizations confirmed the decomposition of lepidolite, formation of water-soluble phases during roasting, and selective separation of Li, Rb, and Cs from insoluble phases during leaching. The porous structure of the roasted product facilitated the dissolution of target metals. This study provides valuable insights and guidance for the efficient extraction of Li, Rb, and Cs from lepidolite, contributing to the comprehensive utilization of this resource.
开发并优化了一种复杂的盐焙烧-水浸出工艺，用于从锂云母中高效提取锂（Li）、铷（Rb）和铯（Cs）。系统研究了焙烧参数（温度、时间和复合盐组成）和浸出参数（温度、时间和液固比）的影响。发现最佳焙烧条件为900℃，60分钟，复合盐组成是锂云母:NaSO:CaCl:CaCO = 1:0.5:0.3:0.05，而最佳浸出条件为60℃，60分钟，液固比为3:1，LiO、RbO和CsO的浸出效率分别达到最高的94.60%、83.33%和82.95%。XRD和SEM表征证实了锂云母的分解、焙烧过程中水溶性相的形成以及浸出过程中Li、Rb和Cs从不溶性相中选择性分离。焙烧产物的多孔结构促进了目标金属的溶解。本研究为从锂云母中高效提取Li、Rb和Cs提供了有价值的见解和指导，有助于该资源的综合利用。
