HIGH-TEMPERATURE FURNACE WITH HEATED MATERIAL CONVEYED MECHANICALLY Russian patent published in 1998 - IPC

FIELD: heat-treatment furnaces for manufacturing, for example, carbide-silicon heaters. SUBSTANCE: heating pipe of furnace roasting chamber is built up of three parts; working part has conical external surface and length of its exit end is greater than that of entrance end; safety pipe of roasting chamber is built up of two parts; length of first part is smaller than that of second one; water-cooled end walls of roasting chamber may have internal rings with admission pipe connections passed through water-cooled jacket. Cooling chamber may be made as three- stage chamber each stage being tube-in-tube structure with water flowing between tubes; length of each next stage is greater than that of preceding one. EFFECT: improved performance characteristics and operating reliability of furnace. 5 cl, 5 dwg