Flotation machine is applicable for the separation of nonferrous metal and ferrous metals, such as fluorite and talc. The impeller is driven by V-belts, which can bring the centrifugal effect to form negative pressure. While extracting sufficient air to mix with ore pulp, the machine stirs ore pulp and mixes it with chemicals to form mineralized froth. By adjusting the height of the flash board to control the liquid level, the useful froth can be scraped from the loam board. The height of the strobe must be adjusted carefully to keep the stabilization of liquid level and scrape the mineralized froth to the launder. The impellers and stators should be kept at a distance and should be changed when worn. The bearing in the pump should be maintained every three months.