西藏玉龙Ⅱ号矿体氧化铜矿石工艺矿物学研究

Study on the process mineralogy of copper oxide ore of Yulong No.2 orebody in Tibet

为了查明西藏玉龙Ⅱ号矿体氧化铜矿的矿石性质,本文通过化学多元素分析、物相分析、光学显微镜下观察及扫描电镜能谱分析等多种研究方法,查明了矿石的主要化学组成、矿物种类、矿物含量及铜矿物的嵌布特征、粒度分布及铜的赋存状态等研究内容。研究结果表明:西藏玉龙Ⅱ号矿体氧化铜矿石中铜的品位为4.43%,氧化程度较高,氧化铜占铜矿石总量的64.33%;矿石中含量最高的组分是SiO_(2)、Al_(2)O_(3)和Fe;铜矿物的种类多样,赋存状态复杂,铜主要赋存于辉铜矿和孔雀石中,其次赋存于褐铁矿、赤铜铁矿中,少量铜以黄铜矿、蓝辉铜矿、铜蓝、蓝铜矿等铜矿物的形式存在。西藏玉龙铜矿矿石具有铜氧化程度高、赋存状态复杂、褐铁矿含量高、高岭石量大等特点,属于复杂难处理的高泥质-高铁质氧化铜矿。

In order to find out the ore properties of the oxidized copper ore in Yulong No.2 orebody,Tibet,the main chemical composition,mineral species,mineral content and distribution characteristics of copper minerals in the ore area are found out by means of chemical multi-element analysis,phase analysis,observation under optical microscope and energy spectrum analysis under scanning electron microscope particle size distribution and occurrence of copper.The results show that the grade of copper in oxidized copper ore of Yulong No.2 orebody in Tibet is 4.43%,the degree of oxidation is high,and the oxidized copper accounts for 64.33%of the total copper ore.The most abundant components in the ore are SiO_(2),Al_(2)O_(3) and Fe.There are various kinds of copper minerals with complex occurrence state.Copper mainly occurs in chalcocite and malachite,followed by limonite and hematite.A small amount of copper exists in the form of chalcopyrite,chalcocite,copper blue,chalcocite and other copper minerals.The ore in this mining area is characterized by high degree of copper oxidation,complex occurrence,high content of limonite and large amount of kaolinite.It is a complex and refractory high argillaceous high iron oxide copper ore.