The interface dynamic behaviors of sulfide mineral carbon paste electrodes in NaCl electrolyte were investigated by alternating
current impedance technique.An equivalent circuit of
electrogenerative leaching process was postulated based on the oxidation reactions of sulfide minerals electrogenerative leaching.The alternating current impedance diagram of the process was deduced.The results show that the alternating current impedance diagram of the process is composed of one semicircle and one beeline being 45° to the horizontal axis in the first quadrants.The semicircle represents the resistance of the electrochemical reactions and capacitance of double layer and the beeline denotes the diffusion of resultant through the passivation of sulfur film and the sulfide mineral which is not reacted.The anodic polarization of sulfide minerals is controlled by(electrochemistry) and diffusion simultaneously.The supposed process is consistent with the actual anodic one of electrogenerative leaching of sulfide minerals.