醋酸-醋酸钠体系中铜铅硫化矿物电氧化浸出分离行为

针对铜铅复杂矿物难以高效分离的技术难题，文中构建了醋酸-醋酸钠电氧化体系，并系统考察了方铅矿、黄铜矿的电氧化浸出分离行为。结果表明，醋酸-醋酸钠不仅能维持体系的稳定，还能与铅离子结合形成络合物，强化方铅矿的选择性浸出过程。优化的工艺条件为:固液比0.02 g/mL，搅拌速度700 r/min，阳极电流密度659.4 A/m2，常温，反应时间60 min，氯化钠浓度3 mol/L，槽电压3.8~4.4 V。优化条件下，Pb的浸出率达71.55%，Cu的浸出率仅为1.85%，实现了铅、铜硫化矿物的经济高效分离回收。该技术具有良好的工业化应用前景 

Electro-oxidation leaching and separation behavior of copper-lead sulfide minerals in acetic acid-sodium acetate system

Aiming at solving the technical problem that the complex copper-lead minerals are difficult to separate efficiently, this paper introduced an acetic acid-sodium acetate electro-oxidation system and systematically investigated the electro-oxidation leaching and separation behavior of galena and chalcopyrite. The results showed that acetic acid-sodium acetate can not only maintain the stability of the system, but also strengthen the selective leaching process of galena by combining with lead ions to form complexes. The optimized process parameters were: solid-liquid ratio 0.02 g/mL, stirring speed 700 r/min, anode current density 659.4 A/m2, normal temperature, reaction time 60 min, sodium chloride concentration 3 mol/L, cell voltage 3.8~4.4 V. Under such optimized conditions, the leaching rate of lead reached 71.55%, and that of copper is less than 1.85%, which led to the economical and efficient separation and recovery of lead and copper minerals. This technology has a good industrial prospect in application.