Atmospheric control of flux pre-melting furnace

Details Atmospheric control of flux pre-melting furnace Atmospheric control of flux pre-melting furnace

1977-03-01

1980-05-13

Envall, Jr., Roy N.

13 9ES, F27D 706

Patent

active

042029970

ABSTRACT:
A graphite lined crucible includes an upper horizontally extending flange having a seal ring around its periphery. The crucible may be raised by a hydraulic cylinder so as to bring the seal ring into engagement with the inside of a refractory lined roof. Electrodes supported by the roof extend downwardly into the crucible for melting the flux within the crucible. The roof and the crucible are air-tight thereby preventing air from entering the crucible. An exhaust port located in the upper portion of the roof is connected to a vacuum device for exhausting fumes from the crucible and for controlling the atmosphere within the crucible.

REFERENCES:
patent: 2996559 (1961-08-01), Gruber et al.
patent: 3973076 (1976-08-01), Scott et al.

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