摘要
某铂钯矿位于津巴布韦大岩墙,为掌握该铂钯矿的矿石性质以推进资源的开发利用,采用化学分析、光学显微镜、扫描电镜(SEM)、矿物自动定量分析系统(AMICS)等多种测试手段进行了系统的工艺矿物学研究,查明了矿石的矿物组成、铂钯矿物的赋存状态、硫化矿物的嵌布特征及解离度特征。结果表明,矿石中铂和钯的品位为1.69g/t和1.41 g/t;金属矿物主要为磁黄铁矿、镍黄铁矿、黄铜矿,非金属矿物主要为顽火辉石和滑石,铂族矿物主要为碲铋钯矿、铋碲铂矿、硫镍铂钯矿;铂钯矿物嵌布关系复杂,但有83.35%的铂钯矿物与硫化矿物的嵌布关系密切;铂矿物和钯矿物嵌布粒度主要分布于1~20μm,分布率高达91.99%和94.68%,硫化矿物嵌布粒度较为均匀,+20μm粒级分布率高达90.65%;在磨矿细度为-74μm占85%的条件下,矿石中单体及富连生体硫化矿物占比93.84%。基于矿石中铂钯矿物与硫化矿物的嵌布关系密切、硫化矿物嵌布粒度较粗,且矿石中含一定量的滑石、绿泥石等易泥化矿物,同时结合铂钯矿物仍有一定比例嵌布于脉石裂隙与脉石粒间,推荐选矿选择两段磨矿浮选—浮选尾矿重选的工艺流程,既可削弱脉石矿物对选别的不利影响,又能充分提高铂钯矿物的回收指标。
A platinum-palladium mine is located in Zimbabwe′s Great Dyke.In order to master the ore properties and promote the development and utilization of the resource,process mineralogy study was carried out systematically through chemical analysis,optical microscopy,scanning electron microscopy and automated mineral identification&characterization system,etc.The mineral composition,the occurrence state of platinum and palladium minerals,the distribution characteristics and the liberation characteristics of sulfide minerals were found out.The results showed that the grade of platinum and palladium in the ore are 1.69 g/t and 1.41 g/t,respectively.The main metallic minerals in the ore are pyrrhotite,nickelpyrite and chalcopyrite,the non-metallic minerals are enstatite and talc,and the platinum group minerals are mainly merenskyite,biteplatinite and braggite.The distribution characteristics of platinum and palladium minerals are quite complicated,and 83.35%of platinum and palladium minerals are closely related to sulfide minerals.The particle size distribution of platinum and palladium minerals are mainly in the range of 1~20μm,with the distribution rates of 91.99%and 94.68%.The particle size distribution of sulfide minerals is relatively uniform,with the distribution rate of+20μm reaching 90.65%.The distribution rate of monomer and rich intergrowth sulfide minerals in the ore reach up to 93.84%under a grinding finessness of 85%passing 74μm.Considering that platinum and palladium minerals in the ore have a close relationship with sulfide minerals,the sulfide minerals have a coarse dissemination size,and the ore contains a certain amount of talc and chlorite,meanwhile,platinum and palladium minerals are still embedded in the cracks and grains of gangue minerals to a certain extent,it is recommended to choose the principle process flowsheet of two-stage grinding flotation and flotation tailings gravity separation.The principle have much more advantages in reducing bad effect on flotation and improving the recovery of platinum and palladium minerals.
作者
王怀
赵声贵
刘敬智
于梓丰
胡学平
何玉军
WANG Huai;ZHAO Shenggui;LIU Jingzhi;YU Zifeng;HU Xueping;HE Yujun(Norin Mining Limited,Beijing 100053,China)
出处
《金属矿山》
CAS
北大核心
2023年第5期282-289,共8页
Metal Mine
关键词
铂钯矿
赋存状态
嵌布特征
粒度分布
platinum-palladium ore
occurrence state
dissemination characteristic
particle size distribution
