Industrial electric heating furnaces – Resistance furnace device – With heating element detail
Patent
1983-03-21
1985-01-08
Envall, Jr., Roy N.
Industrial electric heating furnaces
Resistance furnace device
With heating element detail
373137, H05B 366, F27D 100
Patent
active
044930895
ABSTRACT:
A kit is provided that is especially designed for relining electric furnaces of circular cross section and relatively standard dimensions. Prefabricated rings of ceramic fibers bonded together with an inorganic binder form integral, rigid bodies that can be easily handled. Some rings are provided with protruding hangers at predetermined desired locations, spaced around the interior circumference of the ring. The hangers are each formed with an upturned hook at one end of a short intermediate section that supports the heating ribbon and with a straight, elongated section at the other end thereof which is oriented at an angle of between about 115.degree. and about 155.degree. thereto. The elongated ends fit into downwardly inclined holes which are correspondingly oriented at an angle between 25.degree. and 65.degree. to the interior, vertical, circumferential wall of the ring. Additional, rigid, ceramic-fiber, spacer rings are located above or below the hanger-carrying ring, and a relatively thin sealing batt of flexible refractory fiber felt is preferably located at the interface between adjacent rings. Optional ceramic spacers may be installed below each of the hangers.
REFERENCES:
patent: 4088825 (1978-05-01), Carr
patent: 4341916 (1982-07-01), Byrd, Jr. et al.
patent: 4346252 (1982-08-01), Walton et al.
Envall Jr. Roy N.
Refractory Poroducts Co.
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