Abstract: In order to further improve coarse particles flotation recovery, developing next-generation flotation machine impellers is one of the research priorities. Aiming at the low coarse particles flotation recovery of certain molybdenum ore, a new type of flotation machine impeller was applied to the partial flotation process of the molybdenum ore. By conducting a study of the dynamics performance of flotation machine, the stir for dispersion and sorting effect of the new type of flotation machine impeller was compared and analyzed. It was shown that the new flotation machine impeller improved the transport height of coarse particles in the groove, thus promoting coarse particle recovery. During the test period, the total recovery of molybdenum in the selected plants increased by 1.73 percent.