西藏甲玛角岩型铜钼矿石工艺矿物学研究

Process mineralogy of hornstone copper-molybdenum ore in Jiama,Tibet

利用显微镜、MLA、电子探针及化学分析等手段,对西藏甲玛角岩型铜钼矿石进行了系统的工艺矿物学研究,查明了矿石中矿物组成、矿物嵌布特征、矿石结构构造、目的矿物种类及分布率等,并讨论了影响矿石中目的矿物回收的矿物学因素。结果表明:矿石中硫化矿物相对含量为4.48%,脉石矿物主要为石英、长石及云母类矿物;铜矿物主要为黄铜矿,粒度以小于0.053 mm为主,与脉石矿物嵌连密切的黄铜矿容易流失,会影响铜的回收;钼矿物主要为辉钼矿,粒度以-0.053~+0.010 mm为主,与脉石矿物呈贫连生体状态的辉钼矿易流失到浮选尾矿中。研究结果为该矿石资源的高效开发利用提供了依据。

Systematic process mineralogy study on hornstone copper-molybdenum ore in Jiama,Tibet,is carried out by the use of microscope,MLA,electronic probe and chemical analysis,investigates the mineral composition,mine-ral embedding characteristics,ore structure,target mineral type and distribution rate in ores,and discusses the mineralogical factors that influence target mineral recovery from ores.The results show that the relative sulfide content in ores is 4.48%;the gangue minerals are mainly quartz,feldspar and mica group;copper minerals are mainly chalcopyrite dominated by-0.053 mm grains,and the chalcopyrite closely related to gangue minerals is easily lost,influencing copper recovery;molybdenum minerals are mainly molybdenite dominated by-0.053-+0.010 mm grains,poor locked molybdenite and gangue minerals are easily lost into flotation tailings.The research results provide basis for efficient development and utilization of the ore resource.