Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – With means to discharge molten material
Patent
1990-07-16
1991-10-29
Rosenberg, Peter D.
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
With means to discharge molten material
266239, H05B 720
Patent
active
050609149
ABSTRACT:
A method for controlling process conditions in a continuous skull nozzle process is provided wherein one or more process parameters are controlled to maintain the operation of the process within a process window derived using integral solutions and expressed in terms of dimensionless parameters. The process window defines a range of values for the controllable process parameters within which a steady state solidified skull will be maintained and outside of which a steady state solidified skull will not be maintained. A pressure differential between the inside of a crucible holding the melt and outside of the crucible is one process parameter which is controlled to adjust the melt discharge flow rate to maintain operation within the process window.
REFERENCES:
patent: 4345467 (1982-08-01), Carlson
patent: 4654858 (1987-03-01), Rowe
patent: 4793596 (1988-12-01), Kutota
Wang, H. P. and Perry, E. M.; "Criteria for Achieving a Stable Solidified Layer Inside a Nozzle Using Integral Solutions"; General Electric Corporate Researach and Development Report No. 88CRD288; Oct. 1988.
Wang, H. P. and Perry, E. M.; "Formation and Growth of the Sodidified Layer During Filling in the Investment Casting Process with an Application for Titanium Casting"; General Electric Corporate Research & Development Report No. 88CRD023; Jun. 1988.
Pang Yuan
Wang Hsin-Pang
Davis Jr. James C.
General Electric Company
McDaniel James R.
Rosenberg Peter D.
Webb II Paul R.
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