白云鄂博稀土、铌、钍在矿石中分布规律及伴生关系  

Distribution and Association of REE,Nb and Th in Bayan Obo Ore

作　　者：张铁柱[1,2] 王建英 李保卫 刘明宝 张雪峰[1,2] 

机构地区：[1]内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室,内蒙古包头014010 [2]内蒙古科技大学数理与生物工程学院,内蒙古包头014010

出　　处：《稀土》2015年第5期87-91,共5页Chinese Rare Earths

基　　金：内蒙古自治区科技重大专项(白云鄂博高值综合利用的基础及关键技术研究);国家重点基础研究计划(973计划)(2012CB722802)

摘　　要：利用电感耦合等离子原子发射光谱(ICP)对白云鄂博矿中稀土、铌、钍元素含量进行检测并分析这些元素在矿石中分布规律及伴生关系。分析显示,稀土、铌、钍元素呈类似于正态分布,但在高、低浓度显著偏离正态分布曲线;镧、铈、镨、钕具有很高的伴生关系,相关性均值为0.92;稀土与铌元素呈弱相关,相关系数为0.037;稀土与钍元素呈负相关,相关系数为-0.2。研究结果对稀土、铌、钍的富集分离具有重要的现实意义;低含量稀土可与高含量稀土如镧和铈一同富集分离;稀土元素的富集,使用适当的方法如X-射线拣选,可以不影响铌、钍元素的富集。The distribution and association of REE,Nb and Th in Bayan Obo ore were studied by ICP. Measurements of average concentration（ x）,occurrence frequency with respect to concentration and standard deviation（ σ） indicated that the distribution profiles in general were similar to normal distribution; however,at the very low and very high concentrations,the curves deviated greatly from normal distribution. The degrees of cooperative occurrence or association of major light REE in ore blocks were as high as 0. 92. Meanwhile,Nb was weakly associated with REE with an association coefficient to be 0. 037,and Th was negatively associated with REE with an association coefficient to be-0. 2. Our findings have important implication for enrichment and separation of multi minerals in Bayan Obo ores. Specifically,the lowly concentrated REE can be enriched along with La or Ce that are easily measured due to high concentration; Nb and Th can be enriched independently from REE by appropriate methods,e. g. X-ray picking,due to their weak or negative association with REE.

关 键 词：X荧光拣选 稀土 分布规律 伴生关系 

分 类 号：TD955[矿业工程—选矿]