摘要
借助化学检测分析,化验了白云鄂博主、东矿萤石型铁矿石中ThO_2的含量,并利用扫描电镜、微区能谱分析、自动矿物分析系统,主要对主、东矿萤石型铁矿石中钍的赋存状态和分布规律做了研究。结果表明:主、东矿萤石型铁矿石中钍的独立矿物(钍石、铁钍石)极少,钍主要以类质同象的形式赋存于稀土矿物(氟碳铈矿、独居石)中;主、东矿萤石型铁矿石中氟碳铈矿中ThO_2的平均含量比约为1∶2,而独居石中ThO_2的平均含量比约为3∶1;查明主矿萤石型铁矿石中74.88%的ThO_2分布于氟碳铈矿和独居石中,二者ThO_2分布量比较接近,东矿萤石型铁矿石中62.63%的ThO_2分布于氟碳铈矿和独居石中,氟碳铈矿中ThO_2的分布量是独居石中的3.4倍。
By means of chemical analysis,the content of ThO2 in fluorite-type iron ore of Bayan Obo Main Mine and East Mine were analyzed,using scanning electron microscope,energy spectrum analysis and automatic mineral analysis system,the occurrence and distribution of thorium in the fluorite-type iron ore of the Main Mine and East Mine are studied. The results showed that the independent minerals of thorium（ thorite,ferrothorite） in the fluoritetype iron ore of the Main Mine and East Mine are rare,thorium is mainly in the form of isomorphism occurs in rare earth minerals（ bastnasite,monazite）. In the Main Mine and East Mine fluorite-type iron ore,the average content of ThO2 in bastnasite of Main Mine is about 1∶ 2 of the East Mine,and the average content of ThO2 in the monazite of the Main Mine is 3 times that of the East Mine. It is found that 74. 88% of ThO2 are distributed in the bastnasite and monazite of fluorite-type iron ore in the Main Mine,and the distribution of ThO2 is relatively close,and62. 63% of the ThO2 are distributed in the bastnasite and monazite of fluorite-type iron ore in the East Mine,the distribution of ThO2 in bastnasite is 3. 4 times that of monazite.
作者
侯晓志
杨占峰
王振江
王文才
Hou Xiaozhi;Yang Zhanfeng;Wang Zhenjiang;Wang Wencai(Institute of Mining Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China;Baotou Rare Earth Research Institute, Baotou 014010, China)
出处
《中国稀土学报》
CAS
CSCD
北大核心
2018年第3期365-371,共7页
Journal of the Chinese Society of Rare Earths
基金
北方稀土科技项目(BFXT-2015-D-0002)资助
关键词
白云鄂博矿
萤石型铁矿石
钍
赋存状态
分布规律
稀土
Bayan Obo ore
fluorite-type iron ore
thorium
occurrence state
distribution law
rare earths
