Metallurgical apparatus – With means to preheat gas
Patent
1978-03-01
1979-08-28
Dost, Gerald A.
Metallurgical apparatus
With means to preheat gas
266240, 266242, F27B 1402, F27B 1414
Patent
active
041658655
ABSTRACT:
A crucible furnace for high-temperature melting of metals or other materials which includes a capped vessel for serving as a crucible to hold a charge of material to be melted, a solid baffle surrounding and closely spaced from the vessel to form a restricted passageway and a refractory wall surrounding and widely spaced from the baffle to form a combustion chamber. Fuel is supplied at the base of the combustion chamber and mixed with air preheated by a compact internal recuperator operative from exhaust gases exiting the restricted passageway. The fuel is burned in the combustion chamber, heating the baffle which in turn radiates heat to the vessel containing the charge. Several of the elements forming the combustion and heat transfer system also serve as structural elements providing rigid support to internal components when the furnace is upright and when it is tilted to pour off melt. Adjacent its top, openings are formed through the baffle to permit flame and combustion products to pass from the combustion chamber downwardly through the restricted passageway and recuperator region to the exhaust flue. Thus, heating of the vessel is also had by convection. The combustion chamber is isolated from the charge in the vessel by a seal, the integrity of which is maintained by downward pressure from a lip formed on the crucible.
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Nowak Leonard G.
Nunes Maurice
Shefsiek Paul K.
Dost Gerald A.
Holcroft and Company
Messenger Herbert E.
Neal James L.
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