This flotation machine is suitable for the selection of non-ferrous metals, ferrous metals, non-metals (coal fluorite, talc). The flotation machine is driven by the motor's V-belt drive to rotate the impeller, which generates centrifugal force to form a negative pressure. On the one hand, the air is mixed with the slurry, and on the one hand, the slurry is mixed with the drug, and the foam is refined to make the mineral adhere to the foam and float to the surface of the slurry to form a mineralized foam. Adjust the height of the shutter and control the liquid level so that the useful foam is scraped off by the scraper.