包头稀土精矿中钍的赋存状态研究  

Occurrence State of Thorium in Baotou Rare Earth Concentrate

作　　者：罗明标[1] 郭国龙[1] 郭国林[1] 刘成佐[1] 

机构地区：[1]东华理工大学核资源与环境国家重点实验室,江西抚州344000

出　　处：《稀有金属》2010年第3期471-474,共4页Chinese Journal of Rare Metals

基　　金：国防基础科研项目(A3420060146)资助

摘　　要：采用电子探针背散射电子图像、波谱和能谱分析技术,对包头稀土精矿中钍的赋存状态进行了研究。结果发现稀土精矿中没有独立的钍矿石[方钍石(ThO2)、铁钍石(Th,Fe,Ca,Ce)(Si,P)(O,OH).nH2O、钍石(ThSiO4)],而主要以类质同象形式存在于稀土矿物(氟碳酸盐矿物和磷酸盐矿物)。在浮选过程中,钍的独立矿物与含铁的矿物一起浮选出去。氟碳酸盐矿物主要有氟碳铈矿和氟碳钙铈矿,其ThO2含量可高达1.68%;磷酸盐矿物主要是独居石,其ThO2含量可高达1.67%。虽然稀土精矿中没有高含量的独立钍矿物,钍的含量依然高于文献报道中稀土精矿钍的平均含量(约0.2%)。The occurrence state of thorium in Baotou rare earth concentrate was investigated using backscattered electrons image,wave spectrum and energy spectrum technology of electron probe micro-analyzer(EPMA).The results showed that there were no independent minerals [thorianite(ThO2),ferrothorite((Th,Fe,Ca,Ce)(Si,P)(O,OH)·nH2O),thorite(ThSiO4)] in Baotou rare earth concentrate,thorium chiefly hosted in fluoro-carbonate minerals and phosphate minerals as isomorphism state.The independent thorium minerals were floa...

关 键 词：稀土精矿 钍 赋存状态 

分 类 号：TF845[冶金工程—有色金属冶金]