Patent
1978-05-01
1979-04-10
Envall, Jr., R. N.
C03B 502
Patent
active
041490223
ABSTRACT:
A power control system to distribute the electrical energy being supplied to a glass melting furnace of the vertically oriented type wherein raw glass batch is fed at the top level of the melting chamber and molten glass withdrawn at the bottom level of said chamber. Specifically, the present control system supplies electrical power to three sets of electrodes located at different elevation levels in the melting chamber so that when power is increased to the intermediate level electrodes, there is a decrease in power applied to the top level electrodes while a constant power ratio is maintained between the intermediate and bottom level electrodes. Said control system can further include cooperative electrode heating means to refine the molten glass being continuously withdrawn from the bottom of the melting chamber in a separate refining chamber connected thereto. By controlling the glass melting process in this manner, improved temperature control is maintained and hot spots can be generated in the molten glass adjacent the underside of the batch blanket causing a flow of gas bubbles upwardly through the glass at the hot spot locations for escape through the batch blanket.
REFERENCES:
patent: 2773111 (1956-12-01), Arbeit et al.
patent: 3852509 (1974-12-01), Rutledge et al.
Envall, Jr. R. N.
General Electric Company
Kempton Lawrence R.
McDevitt John F.
Neuhauser Frank L.
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