Rotary Kilns

Rotary WebSite A rotary kiln is a continuous process designed specifically for drying, calcining, processing, or sintering bulk materials.

Rotary Kiln Process

The rotary kiln heated chamber is a long horizontal tube that is rotated with one end slightly elevated. The bulk material is continuously fed into the elevated end of the tube and cascades down the length of the tube by the tube’s continuous rotation. The bulk material exits the tube at the other end and falls into a collection hopper. Depending on the required operating temperature of the rotary kiln, the tube material will either be a high temperature metal alloy or ceramic composition.  

Rotary Kiln Design Requirements

The following information is required to determine the tube OD, tube ID, tube length, tube rotation speed, the tube inclination angle, and the tube material:
  • production rate (pounds per hour)
  • bulk density of the feed material
  • angle of repose of the feed material
  • maximum temperature
  • length of time a the maximum temperature
With this information, Harrop designs the tube, surrounds the tube with the appropriate heating chamber and system, applies the appropriate tube speed and temperature control systems. Harrop Industries is a kiln manufacturer. Call us at 614-231-3621 and contact us to order your rotary kiln.

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