河南某铝土矿中锂的浮选回收与提取试验  

Study on Flotation Recovery and Extraction Test of Lithium-bearing Bauxite from Henan Province

作　　者：张荣臻 云辉[1] 刘百顺[1] 程宏伟[3] 翁益民 韩亚 ZHANG Rongzhen;YUN Hui;LIU Baishun;CHENG Hongwei;WENGYimin;HAN Ya(Henan Institute of Geological Survey;Henan Key Laboratory of Metal Mineral Mineralization Geological Processes and Resource Utilization;Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,CAGS)

机构地区：[1]河南省地质调查院,河南省郑州市450001 [2]河南省金属矿产成矿地质过程与资源利用重点实验室 [3]中国地质科学院郑州矿产综合利用研究所

出　　处：《现代矿业》2020年第11期113-116,共4页Modern Mining

基　　金：河南省地质矿产勘查开发局2017年度科研项目(编号:豫地矿科研[2017]01号);河南省自然科学基金(编号:182300410106)。

摘　　要：河南省某地铝土矿矿石中Li2O品位为0.26%,锂主要赋存在高岭石、伊利石等黏土矿物中。为确定铝土矿伴生锂的开发利用工艺,进行了铝土矿浮选工艺试验和富锂精矿的提取试验研究。试验结果表明采用2粗1精、中矿顺序返回的铝土矿浮选闭路流程,可获得Al2O3品位61.72%,铝硅比为11.45的铝土矿精矿产品和Li2O品位0.57%、回收率为78.97%的富锂精矿;富锂精矿与浓硫酸熟化液(固液比)1∶1混合后,在熟化温度180℃、浸出液固比2∶1~3∶1、浸出时间10 min、浸出温度常温的情况下,Li2O浸出率达到94.64%,最终得到纯度为99.56%的碳酸锂产品。采用硫酸熟化—浸出—净化—提锂工艺可实现河南某地铝土矿中锂高回收率和获得高纯度产品的目的,具有一定的实际价值。The lithium-bearing bauxite which comes from Henan province contains 0.26%Li2O,and lithium mainly occurs in the kaolinite and illite.In order to determine the development and utilization of lithium-bearing bauxite technology,bauxite flotation tests and the experimental study on the extraction of lithium have been carried out.The results show that through two roughings,one cleaning and middling back to the flowsheet in turn flotation closed-circle process,the final Al2O3 grade is 61.72%,A/S is 11.45,and Li2O grade is 0.57%,recovery rate is 78.97%;Rich lithium concentrate with concentrated sulfuric acid curing liquid mixed(solid-liquid ratio 1∶1,the curing temperature 180℃,leaching liquid-solid ratio 2∶1 to 3∶1,10 min leaching time,leaching temperature at room temperature,the leaching rate of Li2O can reach 94.64%and got the purity of 99.56%lithium carbonate products finally.Thus,the process of sulfuric acid curing-leaching-purification-extracting lithiumcan achieve high recovery rate and purity of lithium in Henan bauxite,and this process has certain practical value.

关 键 词：铝土矿伴生锂 浮选试验 浸出试验 综合回收 

分 类 号：TD952[矿业工程—选矿] TD923