兑卤法从硫酸钠亚型盐湖卤水中制备碳酸锂  

Preparation of Lithium Carbonate from Sodium Sulfate Subtype Brine by a Brine Mixing Method

作　　者：高峰[1,2,3] 乜贞 郑绵平[3] GAO Feng;NIE Zhen;ZHENG Mian-ping(Institute of Non-Traditional Security,Xinjiang Police College,Urumqi 830011,China;Department of Vessel Command,China Maritime Police Academy,Ningbo 315801,China;MLR Key Laboratory of Saline Lake Resources and Environment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China)

机构地区：[1]新疆警察学院非传统安全研究所,新疆乌鲁木齐830011 [2]公安海警学院船艇指挥系,浙江宁波315801 [3]中国地质科学院矿产资源研究所国土资源部盐湖资源与环境研究重点开放实验室,北京100037

出　　处：《高校化学工程学报》2018年第2期472-477,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(41473061;U1407207);中国地质调查局地质调查项目(DD20160054);中国博士后科学基金(2017M620481)

摘　　要：为开发西藏硫酸钠亚型盐湖—扎北盐湖中的卤水锂资源,提出盐湖联合开发—碳酸盐型卤水与扎北富锂卤水兑卤提锂的新方法。实验以扎北高锂卤水(BI)为原料,扎布耶盐田富碳酸根卤水(BII)为天然沉淀剂,在不同温度(5~90℃)及兑卤比(V_(BII)/V_(BI)=0.5~2.5)条件下进行了碳酸锂混盐的兑卤沉淀。结果表明,在V_(BII)/V_(BI)=1.75、90℃条件下进行兑卤沉淀时,锂收率82.66%,碳酸锂含量88.25%。用该法所制的碳酸锂混盐利于后续提纯,经调浆水洗、烘干研磨后可获纯度高、分散性好的碳酸锂粉末。A brine mixing method using two brines from Li-rich Zhabei Salt Lake(BI)and CO3 2?rich Zabuye Salt Lake(BII)was studied in order to extract lithium from sodium sulfate subtype brine of Zhabei Salt Lake in Tibet.Li2CO3 salts were prepared under 5~90℃and VBII/VBI=0.5~2.5 with BI as material and BII as natural precipitator.The results show that the optimum conditions are VBII/VBI=1.75 and 90℃,and the maximum lithium extraction rate and Li2CO3 content are 82.66%and 88.25%,respectively.The precipitated Li2CO3 salts can be easily purified by slurry mixing,leaching,drying and grinding to obtain Li2CO3 powder with good dispersity and higher purity.

关 键 词：扎北盐湖 硫酸钠型卤水 兑卤法 碳酸锂 

分 类 号：P578.73[天文地球—矿物学] O642.4[天文地球—地质学]