云南某钨矿石工艺矿物学研究

Study on Process Mineralogy of a Tungsten Ore in Yunnan Province

通过采用化学物相分析、MLA、扫描电镜、光学显微镜及能谱分析等方法,对云南某钨矿石的矿物组成、矿物的嵌布粒度和有价元素的赋存状态等进行了详细的工艺矿物学研究,并进行了矿石可选性分析,为有效选别该矿石提供了理论依据。结果表明,该矿石主要有价元素为钨,伴生有金、银等有价金属元素。钨以白钨矿形式存在且粒度较粗,适宜重选。白钨矿在矿石中主要呈块状—星点状分布于非金属矿物(石英、方解石)中,形成半规则连生或包含关系,需要提高磨矿细度以确保钨精矿的回收率。

By applying chemical phase analysis,mineral liberation analyzer(MLA),SEM,optical microscope and energy spectrum analysis,the mineral composition,grain size and occurrence states of valuable minerals are studied in this article,also the beneficiability of the ore is analyzed,which provides a theoretical basis for the effective separation of the ore.Results show that the valuable elements of the tungsten ore are WO_(3),Au and Ag.Tungsten exists in the form of scheelite and its particle size is coarse,so it is suitable for gravity separation.Scheelite is mainly distributed in non-metallic minerals(quartz and calcite)in the form of massive star point,forming a semi regular association or inclusion relationship,so it is necessary to improve the grinding fineness to ensure the recovery rate of tungsten concentrate.