Direct Fired Rotary Kiln vs. Indirect Fired Rotary Kiln - FEECO .In the thermal processing industry, often times a rotary kiln is used to process a wide variety of feed material – from waste sludges to high-value mineral.indirect fired rotary kilns and grinding mills,Rotary Kiln Design: Direct Fired vs. Indirect FiredAnother aspect of rotary kiln design is deciding whether to go with a direct fired rotary kiln, or an indirect fired rotary kiln. The difference between th.
indirect fired rotary kilns and grinding mills