The airflow pulverizing classifier is a device for realizing ultrafine pulverization of dry materials by high-speed airflow. The airflow pulverizing classifier is composed of a pulverizing nozzle, a grading rotor, a screw feeder, etc., and the material enters the pulverizing chamber through a screw feeder, and the air velocity is compressed. The specially configured supersonic nozzle is sprayed at high speed to the crushing chamber, and the material is accelerated in the jet of the supersonic nozzle, and repeatedly impacts and collides at the intersection of the nozzles to reach the crushing device. The airflow crushing classifier and the cyclone separator, the dust collector and the induced draft fan form a complete set of crushing system. After the compressed air is filtered and dried, it is sprayed into the pulverizing chamber at a high speed through a nozzle. At the intersection of the multiple high-pressure air streams, the material is repeatedly collided, rubbed, sheared and pulverized, and the pulverized material moves with the upward airflow under the action of the fan pulling force. To the classification zone, under the strong centrifugal force generated by the high-speed rotating classifier turbine, the coarse and fine materials are separated, and the fine particles meeting the particle size requirements are collected by the classification wheel into the cyclone separator and the dust collector, and the coarse particles are lowered to the crushing zone to continue the crushing. Airflow crushing and classifying machine is widely used in chemical, mineral, metallurgy, abrasive, ceramic, refractory materials, medicine, pesticides, food, health care products, new materials and other industries.

The airflow pulverizing classifier is a gas grading technology mainly based on a square cylinder structure. This technology changes the form of the rotary cylinder of the circular cylinder to make the material more dispersible, thereby improving the classification efficiency. The airflow crushing and classifying machine adopts high-precision horizontal grading form, which has sharp cutting effect, good cutting precision and large grain control performance. The airflow pulverizing classifier also adopts a grading wheel hinge joint structure connection type, which can remove the grading impeller and make the gap adjustment and maintenance very convenient. It reflects the design concept of humanization.