通过化学分析、X射线衍射、光学显微镜、电子探针、MLA等分析手段,对重庆某萤石-重晶石共生矿的化学组成、矿物组成、矿物产出形式、嵌布特征及连生关系等进行了详细研究.结果表明:矿石中的有用矿物为萤石和重晶石,其矿物含量分别为25.51％和60.14％,脉石矿物主要为方解石,含量10％左右,其他还有石英、白云石、橄榄石等,含量很低,对矿石性质影响可忽略不计.矿石硬度低,萤石、重晶石粒度较大,且与方解石三者互相镶嵌、穿插、连生,需要细磨才能使矿物单体较好解离,会造成萤石和重晶石过磨,导致矿石严重泥化,影响精矿的品味和回收率,此研究结果为该矿综合利用提供了重要依据.%The chemical composition,mineral composition,dissemination characteristics and grain size composition of Fluorite-barite ore in Chongqing were investigated through chemical analysis,XRD,optical microscope,EPMA and MLA.The results showed that:The useful minerals are fluorite and barite in the ore,its content respectively is 25.51％and 60.14％,the gangue mineral mainly is the calcite,about 10％ content.In addition,there are quartz,dolomite,olivine and so on,but their content is very low,the effect on the ore properties can be ignored.The hardness of the ore is low,fluorite,barite and calcite mosaic are mosaic and interlocking with each other,by the way,their particle size is large,fine grinding is needed to make the mineral dissociate better.This will lead to the grinding of fluorite and barite,resulting in serious ore mud,and then,affect the concentrate taste and recovery.The results provide an important basis for the comprehensive utilization of the fluorite-barite ore.
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