Used Rotary Kilns / Rotary Calciners

Rotary kilns or calciners are high temperature drum furnaces usually used in continuous processes where the material is fed into one end, tumbles through a rotating chamber and exits through a cooling or quenching section.

Key features for kilns and calciners:

• a cylindrical shell, tube or drum usually made of steel, nickel or high alloy
• a lining made of refractory brick which prevents the shell from overheating.
• multiple heating zones
• heat source can be indirect fired (external) or direct fired (internal)
• temperature ratings ranging from 700 ° F to 1400 ° F, much higher than industrial dryers
• typical fuels used to heat kilns and calciners are electricity, gas and oil
• newer rotary kilns can feature a waste heat recovery system that is often used to fire boilers or drive turbines for power generation
• variety of feed and discharge configurations