Method and apparatus for electrically melting glass

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C03B 502

Patent

active

041616170

ABSTRACT:
A method and apparatus is described for melting of a glass batch with electrical energy supplied by electrodes disposed in a vertically oriented melting chamber and which ameliorates the problems encountered when the raw batch blanket cannot be continuously and uniformly melted in said chamber. Specifically, improved electrode heating means are provided to generate localized hot spots in the molten glass adjacent the underside of the batch blanket and cause a flow of gas bubbles upwardly through the glass at the hot spot locations for escape through the batch blanket. The electrical energy rate supplied to said electrode means is also controlled so that a crust of only partially melted foam-type glass material is not formed within the batch blanket to impede escape of the gas bubbles. The improved system can further include cooperative means to refine the molten glass being continuously withdrawn from the bottom of the melting chamber in a separate refining chamber connected thereto.

REFERENCES:
patent: 2773111 (1956-12-01), Arbeit et al.
patent: 3524206 (1970-08-01), Boettner et al.
patent: 3583861 (1971-06-01), Preston
patent: 3636227 (1972-01-01), McQuaid
patent: 3742111 (1973-06-01), Pieper
patent: 3852509 (1974-12-01), Rutledge et al.

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