关键词: 黄铜矿, 输出功率, 正交实验, 发电浸出

Abstract: The generative principle was applied to leaching process of CuFeS2-FeCl3(aq) and CuFeS2-MnO2 in this study. It was confirmed that a certain quantity of electrical energy along with the leached products could be simultaneously obtained during the process. The factors affecting the power output, such as grain size of concentrate and graphite paste in working electrode, NaCl concentration and pH value of anodic solution, temperature, different systems of cathode, and HCl concentration of cathodic apartment, were investigated by using an orthogonal design and factorial experiments. The results indicated that the materials of cathode were very important, then followed by concentrations of NaCl and HCl of the leaching system. The leaching conditions were optimized according to their effects on the maximal output power. It was shown that the generative impeding factor was mainly solid sulfur gathering on the surface of working electrode based on the discharging experiments under constant resistance in 6 h. Therefore, eliminating elemental sulfur is the key measure to maintain the output power.

Key words: chalcopyrite, output power, orthogonal design, electro-generative leaching