蒙古国某钼矿石的工艺矿物学研究

Study on Process Mineralogy of a Molybdenum Ore in Mongolia

为了高效开发利用蒙古国某品位低、伴生成分多的钼矿资源,开展了系统的工艺矿物学研究。结果表明,矿石中有用矿物主要为辉钼矿、钼钨钙矿和白钨矿,有害脉石矿物主要为滑石;辉钼矿粒度变化大,白钨矿粒度微细,钼钨钙矿的粒度介于白钨矿和辉钼矿之间;矿石的结构主要为粒状柱状变晶结构,构造以块状构造为主;辉钼矿呈片状或弯曲的鳞片状,钼钨钙矿多呈自形晶粒状包含于石榴石、透辉石、方解石等矿物中,白钨矿与鱼眼石连生;矿石中有约30%的钼以氧化钼的形式存在,对钼的浮选回收率有很大影响;与辉钼矿可浮性相近的滑石可采用强磁选工艺除去。因此,矿石宜采用泥砂分选、磁选辅助、选冶联合的工艺处理。

In order to effectively utilize the molybdenum ore resources with low grade and multiple associated components in Mongolia,systematic process mineralogy research was carried out.The results showed that the useful minerals in ores are molybdenite,powellite and scheelite,and harmful gangue minerals is talc.Molybdenite is with variable grain sizes,while scheelite has fine particle size.The particle size of powellite is between them.The structure of the ore is mainly granular columnar crystalloblastic structures and texture is mainly massive texture.Molybdenite is flaky or curved scales.Powellite is mostly selfshaped grain contained in garnet,diopside,calcite and other minerals.Scheelite is associated with apophyllite.About 30%of molybdenum in ore exists in the form of molybdenum oxide,which has a great influence on the flotation recovery rate of molybdenum.Talc with the related floatability of molybdenite can be removed by high-intensity magnetic separation process.The mineral separation process of sediment separation,auxiliary magnetic separation,and beneficiation-metallurgy union is recommended.