Heat treating particulate material - esp. limestone, dolomite or magnesite

摘要

Treated product is separated and treatment gases leaving separator are recycled to preheater. Latter is single or multi stage cyclone heat exchanger. Gases leave this, wholly or in part, to go to hot gas generator and completing a circuit between generator, treatment chamber and preheater. Process esp. applies to treatment of limestone, dolomite or meerschaum suspended in a flow of hot gases.