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The pulverizing action of the Rotormill is supplied by a rotor which spins at high speed.
This rotor is supported by heavy duty bearings which are located at either end of the shaft. This provides the stability necessary for greater material loading while also extending bearing life. The bearings are out of the grinding chamber and are protected from contamination.
The rotor itself consists of two sections:
At the bottom is a fan which provides the air flow for the grinding system. In addition, the fan helps to accelerate and distribute the feed material prior to the material entering the grinding chamber.
The top section is the grinding part of the Rotormill. It consists of a number of rows containing grinding plates which accelerate the air causing it to react with the grooved lining of the Rotormill. This interaction creates miniature pockets of rotating air at very high velocities. This air stream causes the particles to collide with each other and disintegrate while the heat caused by the size reduction is instantly absorbed by the rapidly moving air stream.