Abstract:In order to clarify the influence mechanism of current frequency on the improvement of galena flotation effect by magnetization pretreatment of distilled water with alternating magnetic field, surface tension, dissolved oxygen concentration, infrared spectroscopy and XPS were used to characterize the galena samples treated by magnetized distilled water and magnetized distilled water at different current frequencies. The results showed that alternating magnetic field magnetized distilled water can significantly improve the floatability of galena. Compared with unmagnetized distilled water, the recovery rate of galena can be increased by 12.45% by magnetizing distilled water for 15 min at the current frequency of 0.5 MHz. The dissolved oxygen concentration of distilled water magnetized by alternating magnetic field with current frequency of 0.5 MHz increased by 0.6 mg/L, resulting in the relative content of S-S bond on the surface of galena improved by 20.466 %, that is, part of the sulfur ion on the surface of galena transformed into elemental substance, thus improved the floatability of galena. The research has certain reference significance for the application of alternating magnetic field magnetization pre-treatment technology in sulfide ore flotation.