Metallurgical apparatus – With control means responsive to sensed condition – With analyzer or computation means
Patent
1985-08-28
1987-02-17
Brody, Christopher W.
Metallurgical apparatus
With control means responsive to sensed condition
With analyzer or computation means
C21N 1100
Patent
active
046434011
ABSTRACT:
A vacuum furnace is cooled in a two-step process. In the first step, a noble gas is injected into the furnace to break the vacuum, and to provide initial cooling. In the second step, a non-noble, but relatively inert, gas is injected into the furnace to complete the cooling. The flow of the noble gas is cut off when the temperature in the furnace falls below the point at which the contents of the furnace will no longer react with the second gas. The invention also discloses apparatus for cooling the furnace. Temperature controllers monitor the temperature, and rate of temperature change, in the furnace, and direct controlled amounts of noble or non-noble gas into the furnace. At no time is a liquefied gas allowed to enter the furnace. The process allows the furnace to be cooled rapidly but safely, minimizing the danger of thermal shock to the internal furnace components.
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"The Cryogenic Rapid Cooling Process" by Werner Buecker, Sep. 18, 1984.
Brodbeck Howard D.
Obman Howard J.
Brody Christopher W.
Eilberg William H.
MG Industries
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