HIGH-TEMPERATURE ROTARY MUFFLE FURNACE WITH COMBINED LINING Russian patent published in 1998 - IPC

FIELD: heat treatment of materials with no contact with heat-transfer agent; roasting of powder-like materials at roasting temperature of up to 1750 C; manufacture of catalysts in chemical engineering. SUBSTANCE: lining is combined with firebox of furnace; lining is provided with passages for delivery of secondary air to the firebox of furnace which adjoin rotary body and are located above heat-transfer gas passages; secondary air supply passages and heat-transfer gas passages are provided with inner relief made in the form of wave-shaped grooves along the passages. Combined lining is provided with system of supply and discharge passages which reduce temperature of flue gases to 150-200 C. EFFECT: reduced temperature of exhaust flue gases and smooth heating of active working surface of lining due to delivery of combustion products heated to 1800 C. 2 cl, 2 dwg