云南某氧化铜矿石工艺矿物学研究

Research on Process Mineralogy of a Oxide Copper Ore from Yunnan Province

为了更好地开展云南某氧化铜矿石选矿试验,对有代表性矿石进行了工艺矿物学研究。结果表明：（1）矿石铜品位为0.75%,氧化率高达92.00%,伴生银含量为23.20 g/t,主要铜矿物为孔雀石（蓝铜矿）、含铜褐铁矿和假孔雀石,主要脉石矿物为石英和白云母。（2）矿石原岩由石英岩质角砾岩、岩屑角砾岩、岩屑石英砂岩等组成,主要为浸染状构造和脉状构造,主要结构为填隙结构、交代结构、包含结构、角砾状结构、变余砂状结构、细粒粒状变晶结构。（3）主要铜矿物孔雀石（蓝铜矿）、含铜褐铁矿和假孔雀石的嵌布粒度分别为1.2-212μm（主要为9.6-106μm,分布率达69.39%）、1.75-150μm（主要为4.8-38μm,分布率达58.43%）、1.75-106μm（主要为53-106μm及9.6-19μm,累计分布率达81.39%）。（4）石英、云母、高岭石等脉石矿物与铜矿物的共生关系密切,常与主要铜矿物混杂分布。根据矿石工艺矿物学研究结果,该铜矿石采用浮选工艺回收,预计难以获得理想的铜精矿指标,酸浸可能是相对合理的开发利用工艺。

In order better to carry out beneficiation tests with a oxide copper ore from Yunnan Province,the research on process mineralogy was investigated with the representative ore. Research indicates：（1）The copper grade is 0. 75%,the oxidation rate of 92. 00%,the silver grade is 23. 20 g / t,the main copper minerals are malachite（ azurite）,Cu-bearing limonite,pseudomalachite,the main gangue minerals are quartz and muscovite.（2）The protolith is comprised of quartzite breccias,cuttings breccia,lithic quartz sandstone,etc.,sparse disseminated structure and vein structure are mainly structure,intersertal texture,metasomatic texture,poikilitic texture,brecciated texture,palimpsest texture,fine granular blastic texture are mainly texture.（3）The particle size of malachite（ azurite） in the range of 1. 2 - 212 μm,（ mainly in 9. 6 - 106 μm,accounted for69. 39%）,Cu-bearing limonite in the range of 1. 75 - 150 μm,（ mainly in 4. 8 - 38 μm,accounted for 58. 43%）,pseudomalachite in the range of 1. 75 - 106 μm,（ mainly in 53 - 106 μm,9. 6 - 19 μm,accounted for 81. 39%）.（4）Quartz,muscovite,kaolinite ect. closely symbiosis with the copper,which often confounding with each other. According to the process mineralogy research result,it is estimated that good indicators would not get by flotation process,and leaching process may be more reasonable to recover the copper.