高硫铅锌矿中黄铁矿/毒砂对矿物颗粒间Galvanic Corrosion的影响机理及调控机制

黄铁矿/毒砂的有效抑制是高硫铅锌矿资源有效利用的前提和基础，对保障我国铅、锌以及稀贵金属（银、锗、铟等）资源储备有重要的战略意义。但此类资源嵌布粒度细、高含量硫铁矿（黄铁矿/毒砂）的存在影响其他矿物表面的电化学性质及可浮性，造成分选难度大，尤其是高碱（即高石灰用量）条件严重制约伴生稀贵金属元素综合回收。本项目拟以方铅矿、闪锌矿、黄铁矿、毒砂为研究对象，以氯化钙、腐植酸钠为黄铁矿/毒砂的组合抑制剂，研究粒级效应及硫铁矿含量对矿物颗粒间Galvanic corrosion的微观影响机制，确定铅锌硫化矿物表面的电化学反应过程与矿物颗粒间电化学交互作用机理；建立组合抑制剂与矿物表面性质、矿浆环境的匹配关系与调控机制，实现矿物/水界面的选择性疏水/亲水强化，强化微细粒级矿物的高效分选与回收，实现高硫铅锌矿资源中硫铁矿（黄铁矿/毒砂）的无碱（即无石灰添加）抑制，为复杂矿物资源高效浮选分离提供理论支撑。

The effective depression of arsenopyrite/pyrite is the prerequisite and basis for the effective utilization of high sulfur lead-zinc resources, which has important strategic significance to guarantee the resource reserves of lead, zinc and rare precious metals (sliver, germanium, indium, etc.) in China. However, because of the fine particle size and high content of pyrite in this kind of resources, the electrochemical properties and floatability on other mineral surface are affected, which results in difficult flotation separation. Especially, the comprehensive recovery of associated rare and precious metal elements is severely restricted in high alkali conditions. At present, research on the mechanism of the alkali-free depression and the galvanic interaction between minerals is the main research direction for the efficient separation of high-sulfur lead and zinc ores. The project intends to take galena, sphalerite and arsenopyrite/pyrite as research objects, to take calcium chloride and sodium humate as the combined depressant for arsenopyrite/pyrite, to study the microscopic influence mechanism of particle size effect and arsenopyrite/pyrite content on galvanic interaction between minerals, to reveal the influence of electrochemical reaction process on the mineral surface, to form the theory of electrochemical interaction, to establish the matching relationship and the controling mechanism between the mixed depressant, the surface properties of minerals and the slurry environment, then to realize the selective hydrophobic/hydrophilic strengthening of mineral/water interface, to enhance the efficient separation and recovery of fine-grained minerals at the same time, to realize the alkali-free depression of pyrite in high sulfur lead-zinc mineral resources, and to provide the theoretical support for efficient flotation separation of complex mineral resources.