Industrial electric heating furnaces – Glass furnace device – Joule effect heating
Patent
1981-09-17
1983-08-16
Envall, Jr., Roy N.
Industrial electric heating furnaces
Glass furnace device
Joule effect heating
373 40, C03B 502, H05B 360
Patent
active
043995446
ABSTRACT:
A high temperature electronic furnace wherein a product-containing vessel has a product exit orifice, a plurality of electrodes are located in the vessel to define primary current paths adjacent the orifice, a control electrode is positioned in the vessel for defining an additional current path adjacent the orifice and a circuit for energizing the primary electrodes with multiphase current and for time-sharing the multiphase current with the control electrode. The degree of time-sharing is made responsive to the temperature of product passing through the orifice and/or the rate of flow of product passing through the orifice. In addition, the control electrode is moveably positioned with respect to the orifice, with the position of the control electrode being dependent upon the temperature of product passing through the orifice and/or the rate of flow of product through the orifice. The invention also includes a method for controlling the melting of product wherein primary electrodes of a furnace are sequentially electronically replaced by a control electrode.
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Energy Fibers Int'l. Corp.
Envall Jr. Roy N.
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