Mine flotation machine is also called the impeller type flotation machine, the working principle of this type of flotation machine is: Pulp by into the slurry pipe into the impeller, the vortex impeller centrifugal force generated by the into the trough, and negative pressure formed under cover, automatically by the intake pipe air inhaled. Inhaled air and feed pulp was thrown together in the upper impeller mixing tank, and produce negative pressure, and sucked in air, so continuously. After drug use in the pulp, floating minerals is bubbles to form the mineralized froth surface layer, and concentrate by scraper scrape. Without floatation mineral and gangue is the trough and the gate on the side wall into the middle chamber and give into a flotation tank, each or more the adjustment of the pulp level in the tank, each by adjusting the gate down. The pulp in the machine is such of the circulation.