Supplies is it have by reinforced mouth gyration valve of barrel transport into the hierarchical room to put into. Disperse , grade by the rotor that the level is installed. Thick powder is it move to tube wall office bar office blow and send two air function and first air that centre in charge of off in wind downwards to get rid of. Make the thick powder accelerate moving , putting gyration valve discharging machine outside on the barrel downwards in grades two times, the thin powder is crossed and transfered to the interval of one of cotyledon and sent from blast pipe while catching the collecting device , the tail gas is put from air blower to the atmosphere.

Second, main characteristic:

　　 1, This machine , for the doing type hierarchical machine of supplies air. Adopting the advanced hierarchical principle of vortex and structure in the world, two times can be transfered in the device that the wind and turbine graded dynamically.

　　 2, The structure is advanced, grade the grain size of the reliable products and is distributed in the range narrowly: The energy consumption with high efficiency is low , durable in use.

　　 3, Hierarchical precision high, grade in extensive range, can among 5-120um wanton to adjust grain size.

　　 4, This machine is of simple structure and compact, vibration is small, the noise is low, operate steadily, operate , maintain it conveniently, the automatic degree is high.

Third , use:：Each suitable for the powder body while processing, except the iron, get rid of fibres, choice.