ROTARY HEARTH ANNULAR FURNACE Russian patent published in 1994 - IPC

FIELD: furnaces. SUBSTANCE: furnace has a lined chamber with an arc and walls, heating devices, a hearth positioning mechanism which is supported by a movable support, a hearth with channels. The furnace has pistons from a refractory material equidistantly circumferentially positioned in the walls to provide lateral gas flow, rods connected to the pistons, and a piston drive. The piston drive is made in the form of a column positioned in the furnace center, a profile guide connected to it and cams engageable with piston rods. A hot pressing press may be built in the furnace chamber ahead of a cooling zone. The furnace may be made from interconnected sectors. EFFECT: improved structure. 5 cl, 2 dwg