Working principle:

1. The abrasive material enters the inside of the powder concentrator from the upper hopper of the powder concentrator, falls onto the combined propeller spreading disc integrated with the rotor, and is sprinkled around under the high-speed rotation of the spreading disc, while being propagated by the propeller. The ascending air current generated by the blade rises upward and forms a material boiling on the rotating paddle of the spreading disc. The finer particles in the material float upward and are in a suspended state, while the coarser or heavier materials are dispersed by the spreading disc blades along the wall of the drum to complete the initial powder selection.

2, under the spreading tray, there is a cage-type rotor 10, and the cage-type rotor rotates with the spindle to form a vortex, and the heavy material falling along the wall of the vessel is again broken up, and the fine powder of the mesh is lifted up and returned again. In the circulating wind, the grading is again carried out, and the coarse powder drip device is removed from the inner cone.

3. The cage rotor is arranged above the spreading plate. 6. In the powder selection chamber, the airflow near the surface area of ​​the upper cage type of the rotor and the material dispersed in the airflow are rotated by the classification ring together with the classification ring. At high speeds in the grading circle, a uniform and strong vortex flow is formed around the grading circle. In this region, the relationship between the centrifugal force and the suction force at any position is constant, and the centrifugal force of the material in the airflow can be adjusted by adjusting the rotational speed of the spindle 3 of the motor 2. When the rotational speed increases, the force also increases. At this time, if the air volume is kept constant, the cutting particle diameter is reduced, and the product is thinned; if the rotational speed is decreased, the product becomes thick.

4. After grading by the cage-type rotor, the fine particles enter the external cyclone dust collector along with the circulating wind. Since the air deflector of the newly designed cyclone dust collector is provided with a wind deflector, a reflective screen is added to the inner cone, and a speed reducer is added at the lower end, so that the fluid resistance of the cyclone dust collector is greatly reduced. The circulating wind enters the cyclone dust collector at a higher wind speed under the action of the air deflector. In the enlarged part of the snail angle, the wind speed suddenly decreases, accelerating the sedimentation of the particles, and also improving the dust collecting efficiency of the cyclone dust collector.