Heating – Processes of heating or heater operation – Controlling flame position or work atmosphere
Patent
1981-12-17
1983-09-27
Camby, John J.
Heating
Processes of heating or heater operation
Controlling flame position or work atmosphere
266252, 373 5, 432138, 432198, F27B 904, F27B 916, F27B 504
Patent
active
044066180
ABSTRACT:
A method of operating a continuous heat treatment furnace for metal strip coils includes steps of enclosing them in muffles in the furnace supplied with an atmosphere gas containing a combustible gas such as hydrogen and feeding the muffles into and through the furnace having therein heating, soaking and cooling zones. According to the disclosed method, at least part of the heating and soaking zones is heated by direct firing heating with a fluid fuel with excess air and combustible gas leaked from the muffles into the furnace is burnt in the furnace with the aid of the excess air. Combustible gas leaked from the muffles into the cooling zone is diluted with air forced into the cooling zone to make the combustible gas incombustible and thereafter to exhaust it out of the furnace, thereby eliminating ignition means for the combustible gas in the furnace and particular precaution for preventing an ignition failure.
REFERENCES:
patent: 2504810 (1950-04-01), Dailey, Jr.
patent: 3836320 (1974-09-01), Hemsath et al.
Camby John J.
Kawasaki Steel Corporation
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