Glass furnace having electrically heated submerged throat and me

Details Glass furnace having electrically heated submerged throat and me Glass furnace having electrically heated submerged throat and me

1974-09-16

1976-12-14

Envall, Jr., R. N.

C03B 502

Patent

active

039977102

ABSTRACT:
Arrangement for and methods of operating electrically heated submerged throats between glass melter and final conditioning zones are disclosed which enable the pull rate of glass to be reduced while maintaining temperature control and to be stopped without freezing the molten glass in the throat. High rates of heat loss in the throat region are compensated for with a high voltage power supply to electrodes positioned for Joule effect heating of the glass in the throat. Thermal adjustment at maximum pull rates is enhanced by the use of cooled electrodes in the throat as heat extractors with no electrical energy supplied. Low or zero pull rates can be tolerated without throat freeze-up by connecting additional voltage sources in series with the supply to the throat electrode.

REFERENCES:
patent: 2866838 (1958-12-01), Paxton
patent: 2902524 (1959-09-01), Paxton
patent: 3160692 (1964-12-01), Paxton
patent: 3388204 (1968-06-01), Ellis
patent: 3400204 (1968-09-01), Gell

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