Floatation machine uses in classifying in non-ferrous and ferrous metal mineral. Sf is the mechanical agitation type. It can own draw the inspiration and the pulp; compared to a, its spirit is big , and the power loss low, and the impeller lap wears lightly; jif has the self-absorption ability, the suction intensity big, and it may adjust the air input in 0. 1 m3/min -1m3/min; the impeller