铝质岩中锂的浸出富集实验研究  

Study on leaching and enrichment of lithium in aluminum rock

作　　者：吴林[1] 张杰[1] 王建蕊[1] 毛瑞勇[1] 

机构地区：[1]贵州大学矿业学院,贵州省非金属矿产资源综合利用重点实验室,贵州省优势矿产资源高效利用工程实验室,贵州贵阳550025

出　　处：《无机盐工业》2016年第5期24-26,共3页Inorganic Chemicals Industry

基　　金：贵州省科技厅工业攻关项目(黔科合外GY字[2012]3055);贵州省教育厅培育项目(黔教高发[2009]331)

摘　　要：采用氢氟酸作为浸出剂浸出富集铝质岩中的锂,进行了探索实验和单因素实验。结果表明,在75℃、固液比(g/m L)为1∶8、氢氟酸体积分数为17%、反应时间为15 min和搅拌强度为300 r/min的条件下,锂的浸出率高达98.73%;保持其他浸出条件不变,采用常温(25℃)浸出,锂浸出率仍可达83.80%。采用XRD分析原矿和浸出渣的矿物组成,结果表明,氢氟酸与铝质岩的反应主要是氢氟酸选择性溶解锂的主要载体矿物高岭石的过程,锂在反应过程中发生迁出与富集。Lithium in aluminum rock was leached and enriched by leaching agent HF,and the exploration and single factor tests were carried out.Results showed that the leaching rate of lithium was as high as 98.73%,under the conditions of temperature of 75 ℃,solid-liquid ratio（g/m L） of 1 ∶8,HF volume fraction of 17%,reaction time of 15 min,and stirring speed of300 r/min.The other leaching conditions remained the same,the lithium leaching rate of 83.80% could also be reached at room temperature（25 ℃）.The XRD was used to analyze the mineral compositions of raw ore and leaching residue,the results showed that the reaction of HF and aluminum rock was mainly that kaolinite as main carrier mineral of lithium was selectively dissolved by HF,and lithium was mobilized and concentrated in the process.

关 键 词：铝质岩 锂 氢氟酸 浸出 

分 类 号：TQ131.11[化学工程—无机化工]