Electrochemical properties of pyrite pyr

Metal sulphides are typically semiconductors with low electrical conductivity, making them sources of electrons that promote electrochemical reactions significant for sulphide flotation. This study aimed to measure the open-circuit potentials of pyrite, pyrrhotite, and steel electrodes relative to a reference electrode, investigating how potential differences influence flotation behavior. The methodology involved utilizing a two-electrode system with both saturated calomel and gold reference electrodes to ascertain time-potential relationships. Results indicated that the potential of pyrite and pyrrhotite increased over time, whereas steel showed a decreasing trend except at pH 12. Notably, potential dropped with increasing pH for most materials, contrasting with steel. The findings underscore the galvanic interactions between minerals and the grinding media, alongside interactions among the minerals during flotation. This paper elucidates the role of electrochemical mechanisms in flotation efficiency and recovery of sulphide minerals, emphasizing how oxidation-reduction conditions at the mineral-liquid interface affect the flotation process critically.