Abstract: In order to improve the sulfurized flotation effect of malachite, the behavior and kinetic gene characteristics of the staged sulfurized flotation of malachite were systematically studied, and the optimal number of sulfurized flotation sections of malachite was determined by flotation tests. The results show that the floatability of malachite is reduced with the increase of sulfurized time, and the flotation rate of malachite increases with appropriate amount of sodium sulfide, but the flotation rate decreases with the increase of time; when the dosage of sodium sulfide is 4 mg/L, the curing time is 1 min, and the dosage of butyl xanthate is 80 mg/L, the floatability of malachite is the best; the flotation effect of malachite can be improved by adding ammonium carbonate and when the dosage of ammonium carbonate is 50 mg/L, the activation effect of malachite is the best; the flotation rate of each section of malachite is related to the mass distribution ratio of flotation reagents; the total recovery of malachite increases with the increase of the number of sulfurized flotation sections properly; the optimal number of sulfurized flotation sections of malachite is three, and the proportion of flotation agent distribution in each stage is 4∶2∶2.

Key words: Malachite, Staged flotation, Sulfurized flotation, Sodium sulfide, Flotation kinetics, Gene characteristics