二硫化钼新型降杂生产方法

NEW METHOD FOR REDUCING IMPURITY OF MOLYBDENUM DISULFIDE

本方法针对焙烧后的钼精矿采用降杂药剂氯盐1、氯盐2、氯盐3进行一段酸浸,氯盐1呈酸性且可电离出氯离子,因此可具备降铁功能同时可以降铅;而在此过程中产生的硫化氢采用氯盐2、氯盐3吸收,从而彻底杜绝了硫化氢气体的产生。至此通过加入氯盐1、氯盐2、氯盐3可使钼精矿中的杂质铁、铅均由固相变为液相,之后经过二段酸浸加入氢氟酸和盐酸除去二氧化硅及其他硅盐类的非金属杂质,整个过程中完全不产生硫化氢气体。最终得到高纯度的二硫化钼产品(MoS_2≥98. 50%,Fe≤0. 15%,Pb≤0. 02%,SiO_2≤0. 10%),从而形成新型工业化的二硫化钼降杂生产方法。

In this method, chloride salt 1, chloride salt 2 and chloride salt 3 are used to leach molybdenum concentrate after roasting for a period of acid leaching, chloride salt 1 is acidic and can ionize chloride ion, so it can reduce iron and lead, and the hydrogen sulfide produced in this process is absorbed by chloride salt 2 and chloride salt 3, thus completely eliminating hydrogen sulfide gas.By adding chloride salt 1, chloride salt 2 and chloride salt 3, the impurities of iron and lead in molybdenum concentrate can be changed from solid phase to liquid phase, and then the non-metallic impurities of silicon dioxide and other silicon salts can be removed by adding hydrofluoric acid and hydrochloric acid after two-stage acid leaching.Finally, high purity molybdenum disulfide products (MoS 2<98.50%, Fe<0.15%, Pb<0.02%, Si<0.10%) are obtained, thus forming a new industrialized production method of molybdenum disulfide impurity reduction.