Air Stream Fine Grinding Technology
Fine grinding principle and features
① The raw material is supplied to fine grinding mill body in a circumferential direction.
② It rotates at high speed with the swirling flow generated by the high-speed rotor in the machine<br> and is introduced into the grinding chamber.
⑥ Only coarse particles are once discharged to the outside of fine grinding mill by a high-speed swirling air stream.
⑦ The discharged coarse particles return to fine grinding mill rotating rotor from the reintroduction line arranged on the rotating shaft.
⑧ The reintroduced coarse particles are accelerated by the rotation of the blades and arrive at grinding chamber, where they collide with each other and are fine grinding again.
② It rotates at high speed with the swirling flow generated by the high-speed rotor in the machine<br> and is introduced into the grinding chamber.
3) In the grinding chamber, particles are accelerated from the center of the rotor in the radial direction of the rotating blades, and collide at high speed with particles circling around the outer periphery.
④ After the blades rotate, tangential air vortices are created, and normal air vortices similar to the wingtip vortices of an airplane are created on the surface of the blades. These vortices and swirling air currents rotate at high speed. These vortices and swirling air currents accelerate and amplify particle collisions, accelerating the process of fine grinding.
⑤ Particles crushed by particle collision move to classification zone. ⑥ Only coarse particles are once discharged to the outside of fine grinding mill by a high-speed swirling air stream.
⑦ The discharged coarse particles return to fine grinding mill rotating rotor from the reintroduction line arranged on the rotating shaft.
⑧ The reintroduced coarse particles are accelerated by the rotation of the blades and arrive at grinding chamber, where they collide with each other and are fine grinding again.
Key Points
◆ The rotating rotor blades generate a swirling flow.
◆ It has the role of accelerating the particles in the radial direction.
◆ Particle collision (autogenous fine grinding) by swirling flow is the main grinding action.
* The principle is different from impact pulverization in which particles collide with a blade or repulsion plate.
◆ It has the role of accelerating the particles in the radial direction.
◆ Particle collision (autogenous fine grinding) by swirling flow is the main grinding action.
* The principle is different from impact pulverization in which particles collide with a blade or repulsion plate.
◎ Since the temperature rise is small, it is suitable for fine grinding of
heat-sensitive materials.
◎ Since it consumes less power, running costs are low.
◎ Since the machine wears less, it suppresses the occurrence of contamination.
◎ Since it consumes less power, running costs are low.
◎ Since the machine wears less, it suppresses the occurrence of contamination.