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...
出处
《稀有金属》
EI
CAS
CSCD
北大核心
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
关键词
稀土精矿
钍
赋存状态
rare earth concentrate
thorium
occurrence state
