某复杂低品位铜锌硫化矿工艺矿物学研究

针对某复杂低品位铜锌硫化矿，为降低选矿成本及为生产提供指导依据，进行了工艺矿物学研究。采用化学多元素分析、矿物自动分析仪(MLA)、光学显微镜等分析手段，查明了矿石的元素组成及矿物组成、主要矿物的嵌布特征、共生关系、粒度分布及解离度特征。结果表明，矿石中Cu品位为0.60%,锌品位为0.25%;含铜矿物主要为黄铜矿，含锌矿物主要为闪锌矿；铜锌硫矿物嵌布关系复杂，嵌布粒径大小悬殊，主要矿物单体含量低，黄铜矿及闪锌矿的单体解离度分别为37.92%、32.43%、单体解离度不高；矿石中存在极细粒黄铜矿且细粒级黄铜矿包裹于黄铁矿、磁铁矿、闪锌矿、脉石中导致铜回收困难，部分闪锌矿粒度极细且铜锌硫矿物共生关系紧密，相互包裹，共同赋存于脉石中导致铜锌分离困难。

Process Mineralogy of a Complex Low-grade Copper-Zinc Sulfide Ore

The process mineralogy of a complex low-grade copper-zinc sulfide ore was studied in order to reduce the cost of mineral processing and provide guidance for production. By means of chemical multi-element analysis, mineral automatic analyzer (MLA), optical microscope and other analysis methods, the element composition and mineral composition of ores, distribution characteristics of main minerals, symbiosis relationship, size distribution and dissociation degree characteristics of ores have been found out. The results show that the Cu grade and zinc grade in the ore are 0.60% and 0.25% respectively. Copper-bearing minerals are mainly chalcopyrite and zinc-bearing minerals are mainly sphalerite. The dissemination relationship of copper, zinc and sulphur minerals is complex, and the size of disseminated particles is quite different. The monomer content of main minerals is low. The dissociation degree of chalcopyrite and sphalerite are 37.92%, 32.43% respectively, and the monomer dissociation degree is not high. The existence of extremely fine-grained chalcopyrite in the ore and the inclusion of fine-grained chalcopyrite in pyrite, magnetite, sphalerite and vein lead to difficulties in copper recovery. The fine-grained part of the sphalerite and the close symbiotic relationship between copper, zinc and sulphur minerals, wrapping each other and coexisting in the vein lead to difficulties in separation of copper and zinc.