The flotation machine is suitable for the separation of non-ferrous metals, and can also be used for the separation of non-metals such as coal fluorite and talc. The flotation machine is driven by the motor triangle belt to drive the impeller to rotate, generate centrifugal effect to form negative pressure, on the one hand, absorb enough air to mix with the pulp, on the other hand, stir the pulp to mix with the drug, and refine the foam, so that the mineral bond on the foam, float to the pulp surface and form a mineralized foam. Adjust the height of the gate, control the liquid level, so that the useful foam is scraped out by the scraper.