云南盈江某花岗伟晶岩中钪的赋存状态浅析

Study on modes of occurrence of scandium in granite pegmatite from Yingjiang,Yunnanprovince

钪是典型的稀散元素,大多以类质同象的形式广泛赋存于其他矿物中,其独立矿物极为少见。优越的性能使其具有广阔的应用前景,但目前其研究程度仍然处于起步阶段。本文利用化学分析、光薄片鉴定、扫描电镜和电子探针分析等手段,对云南盈江某花岗伟晶岩中钪矿进行了赋存状态研究。结果表明:含钪矿物主要为云母类矿物(钪含量为44.80×10-6),其次为黏土矿物(为19.20×10-6)、长石类矿物(0.25×10-6);钪主要分散存在于云母类矿物、长石类矿物、闪石类矿物、黏土矿物、榍石、钛铁矿等矿物中,而黑云母则为主要载钪矿物。电子探针结果显示,花岗伟晶岩中黑云母普遍含钪(最高可达440×10-6),可考虑通过分选花岗伟晶岩中的黑云母来提取钪。花岗伟晶岩中含有较高的Sc,指示该地区花岗伟晶岩具有较好的找钪前景。同时,作者提出:选矿工作者应积极寻找一种高效的钪提取工艺,从而降低成本,达到钪的高效利用。

Scandium is a kind of sparsity and spread around element which is mostly exists in other minerals in the form of isomorphism-phase while itsindependent minerals are extremely rare .It is the superior performance that the scandium have broad application prospects ,but its research is still at the initial stage .In this paper ,chemicalanalysis ,polished section identification ,scanning electron microscopeand microscope electrical probe analysis was applied to measure the occurrence of scandium in granite pegmatite from Yingjing ,Yunnanprovince .It was obtained that scandium containing mineral mainly for the mica group minerals with a content of 44 .80ppm ,secondly is clay minerals with a content of 19 .20ppm and feldspathoid with a content of 0 .25ppm .The scandium mainly Dispersed in the mica group minerals , feldspathoid minerals ,amphibole ,clayminerals ,sphene and ilmenite minerals while the biotite is the major scandium -carrier .Microscope electrical probe analysis shows that biotitein granitic pegmatite is scandium -bearing in general ,so that scandium can be extracted by sorting biotite from granitic pegmatite .High content of scandium existed in granitic pegmatite shows a excellent scandium searching exploration prospect in this district .Moreover ,the author puts forward that mineral processing workers should be actively to looking for an efficient extraction of scandiumto get cost reduction so that the scandium can be achieve efficient use .