1.It can be widely used in the beneficiation of non ferrous metals, black metals and nonmetals.It is suitable for the roughing and scavenging of the large and middle dressing plants. 2.Mechanical agitating, self air- inflation and self slurry absorbing.Constitute a flotation unit with flotation cell to be the absorbing tank of each process. 1. Inspiratory capacity is relatively stable;  2. Solid particles suspend better, impeller installation is shallow depth, stator has long life, liquid surface is balance and high sorting efficiency. 3. Generally, bf series separator is always applied with sf series flotation separator to form a joint unit; Sf flotation separator is used for inhalation slot of pulp self-absorption while jjf series separator is used for dc slot. Thus, operations space is level configuration without foam pump to get high sorting indicators. Bf series and sf series also play their respective advantages.