A rotary kiln

The rotary kiln is slightly inclined in the longitudinal direction to the circulation of the stovepipe bring about a transport of material along the inside in the oven, the inlet side of the outlet side.
A rotary kiln is a high quality capital good with a cost of usually several million Euros. His operation is a "continuous operation to organize", and in most cases are rotary kilns 24 hours a day, 7 days a week and operated in 50 or 51 weeks of the year: the continued operation of the new cheer to parking the furnace for maintenance and repair work is "furnace campaign called".
Because of the generally difficult conditions and the thermal sensitive to rapid temperature fluctuations may not lining the continuous operation of a rotary kiln are not interrupted suddenly. In the event of a power failure or damage on the drive to emergency facilities exist, a further rotation of the oven if necessary. to enable its emptying: an auxiliary drive or an emergency operation is needed. suffer because kilns that stop suddenly in a full load with hot materials, often extremely costly damage caused by the one-sided heat transfer of the left standing good: the dreaded "banana arise," can not allow this irreversible bending of the rotary tube by unilateral action of heat to the uselessness.
To heating value fluctuations and to go out of the way power fluctuations, or compensate for unpredictable events (sudden arrest) is often useful in a rotary kiln burner support (fuel medium of pure oxygen to install). This can prevent damage or a complete meltdown of the kiln.

In a rotary kiln can be burned just about everything which has calorific value. Constraining size is the exhaust gas purification. A rotary kiln is like the universal kiln for thermal recovery - which is also reflected in the price.