Turning Waste Into Resources
An Overview of the KDS Micronex™ Grinder-Dryer
1. Raw material containing up to 80 % moisture is dropped into the throat of the KDS Micronex™
where it passes through an air-lock gate valve that eliminates blow-back and dust.
2. The material enters the torus rotor chamber where it falls onto spinning chains and is subject to
enormous centrifugal accelerations. The chains spin with a tip speed of about 400 mph (640 km/h).
The material is “fractured” as it impacts repetitively with the chains and the strike plates on the
sides of the torus. Moisture is squeezed out of the material due to the compressive action of the
impacts. Heat created from the kinetic energy of the impacts also evaporates some of the moisture
in the material. When appropriate particle size reduction is achieved, air flow in the torus lifts the
particles upwards towards the classifier.
3. The floor of the torus, i.e., the clam, opens easily for maintenance. Replacing the bars or chains
can be accomplished in ten minutes or less.
4. The classifier sorts the “fractured” material and can be adjusted for the desired particle size.
Selected particle sizes pass through the classifier and larger particles are forced back to the torus to
repeat the impact process.
5. Air containing water vapor and water droplets leaves the top of the cyclone back into the blower
and then on to the grinding chamber. Water vapor and droplets leave the chamber through the
vapor vents (not shown).
6. Finished material is pneumatically conveyed out of the machine into the cyclone where the fine,
dry processed material falls through the bottom air-lock gate valve to be packaged or placed in a
bulk container.
An Overview of the KDS Micronex Components and Operations
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