西藏多才玛铅锌矿石工艺矿物学研究

为给西藏多才玛铅锌矿详查阶段矿产评价提供依据,对其进行了详细工艺矿物学研究。研究结果表明:该矿石含Pb为4.21%、Zn为2.81%,银、镉、硒、碲和铊分别为27 g/t、0.017%、0.002%、0.03%、0.023%,可进行综合回收利用。铅主要以方铅矿的形式存在,锌主要以闪锌矿的形式存在。方铅矿、闪锌矿为主要回收目的矿物。铅、锌矿物嵌布关系复杂,与其他矿物紧密接触,分离较困难。方铅矿嵌布粒度相对较粗,有利于选矿回收,而闪锌矿嵌布粒度较细,-0.02 mm粒级以下含量高达22.07%,选矿难度大,需要进行细磨工作,才能提高回收率。此外,脉石矿物主要为方解石、石英,具有易磨碎、易泥化等特点,将给铅、锌矿物分选带来不利影响。

Study on Process Mineralogy of Duocaima Lead-zinc Ore in Tibet

In order to provide the basis for the mineral evaluation in the detailed investigation stage of the Tibet-Taicangma lead-zinc mine, a detailed process mineralogy study was conducted. The results show that the ore contains 4.2% Pb and 2.81% Zn. The silver, cadmium, selenium, tellurium and strontium are 27 g/t, 0.017%, 0.002%, 0.03% and 0.023%, respectively, which can be comprehensively recycled. Lead exists mainly in the form of galena, and zinc mainly exists in the form of sphalerite. Galena, sphalerite for the comprehensive recovery of minerals. The relationship between lead and zinc minerals is complex and it is in close contact with other minerals. Separation is difficult. The galena inlay grain size is relatively coarse, which is conducive to beneficiation and recovery. The grain size of the sphalerite inlay is fine, and the content below -0.02 mm is as high as 22.07%. It is difficult to be ore dressing and fine grinding work is needed to increase the recovery rate. In addition, gangue minerals are mostly mud-crystal-gray minerals, which are characterized by easy grinding and easy argillization, which will adversely affect the separation of lead and zinc minerals.