缅甸某氧化铜铅矿石工艺矿物学研究

为给缅甸某氧化铜铅矿石的选矿试验提供依据和指导,采用常规工艺矿物学手段研究了矿石的成分、结构构造和主要矿物的嵌布特征。结果表明:(1)矿石含铜1.52%,含铅7.84%,含银243.80 g/t,主要有用矿物为蓝铜矿、孔雀石、方铅矿、白铅矿等;主要脉石矿物为石英、重晶石和方解石等,矿石矿物成分复杂。(2)氧化铜占总铜的约85%,主要以孔雀石和蓝铜矿形式存在,硫化铜等仅占总铜的约15%;铅矿物的氧化率为65%左右,铅主要以方铅矿、白铅矿和铅矾的形式存在。(3)矿石结构形式有碎裂化蚀变粉砂结构、半自形板状—他形粒状结构、细晶结构、不等粒他形粒状结构、金属不透明矿物具他形粒状结构、残余结构等。矿石碎块中矿物集合体均匀分布,少量蓝铜矿、孔雀石星散浸染状分布,具块状构造及星散浸染状构造。(4)矿石中矿物的嵌布粒度粗细不均,一般在0.004～3 mm,铜矿物粒度一般在0.01～1 mm,铅矿物粒度一般在0.004～1.5 mm。

Study on Process Mineralogy of a Copper-lead Oxide Ore in Burma

In order to provide basis and guidance for the ore dressing test of a copper and lead oxide ore in Burma， the composition， structure and texture of the ore and the embedding characteristics of the main minerals are studied by conventional mineralogical means. The results show that ①the ore contains 1.52% copper， 7.84% lead and 243.80 g/t silver， the main useful minerals are azurite， malachite， galena， cerusite and so on. The main gangue minerals are quartz， barite and calcite， and the ore mineral composition is complex. ②Copper oxide minerals account for about 85% of the total copper minerals， mainly in the form of malachite and azurite， copper sulfide only accounts for about 15% of the total copper， and the oxidation rate of lead minerals is about 65%， lead mainly in the form of galena， cerusite ore and lead alum. ③The structure of ore structure consists of cracking altered siltstone structure， hypautomorphic plate-xenomorphic granular structure， fine crystal structure， unequal granular and granular structure， metallic opaque mineral with granular structure and residual structure. Mineral aggregates in ore fragments are evenly distributed， and a small amount of azurite and malachite scattered disseminated， with massive structures and scattered disseminated structures. ④The granularity of the minerals in the ore is not uniform， usually from 0.004 to 3 mm， and the size of the copper minerals is generally 0.01 ~ 1 mm， and the size of the lead minerals is generally 0.004 to 1.5 mm.