METHOD OF OPERATION OF STIFF-MUD PROCESS ROTARY FURNACE Russian patent published in 1998 - IPC

FIELD: roasting of materials; manufacture of building materials. SUBSTANCE: raw material mixture is fed to ascending shaft of cyclone heat exchanger and/or to cyclone heat exchanger at probable burning of fuel in shaft; provision is also made for supply of powdered raw material to ascending shaft and/or to cyclone heat exchanger at probable burning of fuel in shaft. EFFECT: enhanced productivity and reduced specific consumption of fuel, provided raw material is free of toxic agents or their content is low. 1 dwg