Furnaces through which the charge is moved mechanically

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F27Furnaces F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL OPEN SINTERING OR LIKE APPARATUS

F27B9/00Furnaces through which the charge is moved mechanically

F27B9/02of multiple-track type of multiple-chamber type Combinations of furnaces F27B9/021having two or more parallel tracks F27B9/022With two tracks moving in opposite directions F27B9/023with a U turn at one end F27B9/024with superimposed tracks F27B9/025having two or more superimposed tracks F27B9/028Multi-chamber type furnaces F27B9/029Multicellular type furnaces constructed with add-on modules F27B9/04adapted for treating the charge in vacuum or special atmosphere F27B9/042Vacuum furnaces F27B9/045Furnaces with controlled atmosphere F27B9/047the atmosphere consisting of protective gases F27B9/06heated without contact between combustion gases and charge electrically heated F27B9/061with at least two longitudinal chambers carrying combustion gases F27B9/062electrically heated F27B9/063Resistor heating F27B9/065the resistance being transported by the conveyor F27B9/066heated by lamps F27B9/067heated by induction F27B9/068heated by radiant tubes, the tube being heated by a hot medium F27B9/08heated through chamber walls F27B9/082Muffle furnaces F27B9/084the muffle being fixed and in a single piece F27B9/086with two or more fixed muffles F27B9/088Series of separate muffles conveyed through the furnace F27B9/10heated by hot air or gas F27B9/12with special arrangements for preheating or cooling the charge F27B9/14characterised by the path of the charge during treatment characterised by the means by which the charge is moved during treatment F27B9/142the charge moving along a vertical axis F27B9/145the charge moving along a serpentine path F27B9/147the charge moving on an inclined floor F27B9/16the charge moving in a circular or arcuate path F27B9/18under the action of scrapers or pushers F27B9/185multiple hearth type furnaces F27B9/20the charge moving in a substantially straight path tunnel furnace F27B9/201walking beam furnace F27B9/202Conveyor mechanisms therefor F27B9/203having ramps F27B9/205having excentrics or lever arms F27B9/206consisting of a single central beam F27B9/207consisting of two or more conveyors F27B9/208the workpieces being rotated during their advance F27B9/22on rails F27B9/222the path comprising a section specially adapted for effecting equalisation of the temperature of the charge F27B9/225the charge being subjected to an additional manipulation along the path F27B9/227with rotation of the charge F27B9/24being carried by a conveyor F27B9/2407the conveyor being constituted by rollers (roller hearth furnace) F27B9/2415the charge rotating about an axis transversal to the axis of advancement of the charge F27B9/2423the charge rotating about an axis parallel to the axis of advancement of the charge F27B9/243Endless-strand conveyor F27B9/2453Vibrating conveyor (shaker hearth furnace) F27B9/2461the charge being suspended from the conveyor F27B9/2469the conveyor being constituted by rollable bodies F27B9/2476the conveyor being constituted by air cushion F27B9/26on or in trucks, sleds, or containers F27B9/262on or in trucks F27B9/28for treating continuous lengths of work F27B9/30Details, accessories, or equipment peculiar to furnaces of these types F27B9/3005arrangements for circulating gases F27B9/3011arrangements for circulating gases transversally F27B9/3044Furnace regenerators F27B9/3077Arrangements for treating electronic components F27B9/32Casings F27B9/34Arrangements of linings F27B9/36Arrangements of heating devices F27B9/38Arrangements of devices for charging F27B9/39Arrangements of devices for discharging F27B9/40Arrangements of controlling or monitoring devices