某铀钼矿床氧化带矿石钼赋存状态研究

Study on Molybdenum Occurrence State From Oxidized Zone in a U-Mo Deposit

针对某铀钼矿床氧化带矿石中钼元素的赋存状态进行了研究。通过显微镜观察、电子探针微区测试、化学物相分析以及水浸试验,查明了浅部矿石化学组成、矿物组成、钼矿物种类及嵌布关系、钼存在形式等。结果表明:矿石矿物种类较多,氧化带中除少量钼以类质同象或吸附形式存在外,主要为钼的氧化物,如铁钼华、蓝钼矿等,大多以微细粒、细脉状分布;矿石蚀变较强烈,水云母化、绿泥石化尤其发育,黏土含量高,极易泥化,且破磨颗粒不均匀,不利于固液分离;矿石含水溶性钼,且矿物粒度细、分布散,不适宜选矿。

Study on the molybdenum occurrence state from oxidized zone ore in a U-Mo deposit was carried out.The chemical composition,mineral composition,molybdenum species and fabric embedded,Mo existence forms have been tested by application of several methods such as microscope、EPMA、chemical phase analysis and water immersion test.The results show that besides of a little Mo exists as isomorphism or absorbed state,it is mainly exist in molybdenum oxide,like ferrimolybdit,ilsemannite,and distributed in the forms of micro-fine particles.The sample shows strongly alteration,especially hydromicazation and chloritization,high content of clay,which lead difficult in crushing and grinding processes.In addition,the ores have high content of water soluble Mo with fine particle size and scattered distribution,therefore,the ores are not convenient for beneficiation.