MUFFLE FURNACE Russian patent published in 2002 - IPC

FIELD: devices for heat treatment of materials without contact with heat carrier; applicable in chemical machine building for production of catalysts. SUBSTANCE: muffle furnace has rotating drum accommodating ceramic muffle made with working chamber and ducts for heat carrier located over periphery and provided with transverse perforated partitions located over length of ducts. Ducts are partially filled with inert loose material. In this case, walls of ceramic muffle forming working chamber are made of material with differential thermal conductivity. EFFECT: compensation of heat losses in working chamber walls in heat carrier motion and directed variation of thermal resistance of walls in transverse direction over furnace length for obtaining of holding temperature zone and heat economy. 5 cl, 1 dwg