Widely used in a variety of difficult to sieve micro-fine powder, 50-500 mesh range of fine powder can be well sieved. Such as light calcium powder, active calcium powder, active carbon powder, starch, Chinese medicine powder, fly ash, zinc powder, graphite powder, quartz sand powder, gold powder, clay powder, hawthorn powder, fruit sparse powder, calcium hydroxide powder, pesticide powder, konjac powder, fluorescent powder, wood flour, flour, epoxy resin powder, manganese dioxide, sulfur powder, alumina powder, gum wood powder, magnesium oxide, perlite powder, iron powder, cotton short staple and so on. Airflow sifter is a kind of mesh screening and grading equipment, not a mill. The crushing function of the feeder is only to break up the powder into lumps for the benefit of the screen, and no grinding function. Therefore, in the selection of airflow sifter screening a certain fineness of fine powder, first of all, we must know which contains a large proportion of the fineness of the fine powder, if its fineness is only 200 mesh, want to sieve out the fineness of 325 mesh fine powder is not possible. Air sieve is characterized by sieving fine not coarse, lumpy and granular materials suitable for grading with vibrating screen, Professor Liang Xuezeng presided over the development of the third generation of air sieve powder machine rely entirely on the air flow feeding screening, gas-solid separation, has removed the first generation of air sieve powder machine sieve body to participate in the vibration of the characteristics of the whole machine running smoothly without vibration.