Abstract:In order to understand the influence and mechanism of Pb2+ on the floatability of muscovite through electrochemical pretreatment in the sodium oleate system, a pure mineral flotation test using lead nitrate solution after electrochemical pretreatment was tested, and the muscovite samples were characterized through Zeta potential, infrared spectroscopy and XPS. The results suggested that electrochemical pretreatment could significantly regulate the activation of Pb2+ on muscovite. Compared with untreated, the pretreatment of lead nitrate solution on the muscovite surface can reduce the recovery rate of muscovite by 32.4%. The mechanism is that the pretreatment can reduce the pH value, increase the conductivity of the lead nitrate solution; meanwhile, pretreatment can also convert Pb2+ into PbO2 and lead element in lead nitrate solution, reduce the content of Pb2+, and decrease the lead hydroxyl complexes on the muscovite surface, which is not conductive to the activation of Pb2+ on muscovite. The study not only provide a theoretical basis for electrochemical pretreatment to regulate the activation of Pb2+ on non-metallic minerals, but also give a certain reference significance for the agents of electrochemical pretreatment.