Electric melter for high electrical resistivity glass materials

Details Electric melter for high electrical resistivity glass materials Electric melter for high electrical resistivity glass materials

1987-01-12

1988-04-12

Envall, Jr., Roy N.

Industrial electric heating furnaces

Glass furnace device

Joule effect heating

373 39, C03B 5027

Patent

active

047379669

ABSTRACT:
An electric melting furnace is described for melting high electrical resistivity glass, such as E-glass, within a melting chamber surrounded by a relatively low electrically resistivity refractory, such as chromic oxide refractory, by utilizing interconnected peripherally positioned batch electrodes at substantially the same potential as the chromic oxide walls and centrally positioned electrodes which are immersed a greater distance than the batch electrodes. A quiescent zone is formed adjacent a lower portion of the melting chamber and the batch blanket and effective hydrostatic head of the molten bath are adjusted by controlling the immersion of the batch electrodes within the molten bath.

REFERENCES:
patent: 3806621 (1974-04-01), Machlan
patent: 3818112 (1974-06-01), Clishem et al.
patent: 3842180 (1974-10-01), Froberg et al.
patent: 4483008 (1984-11-01), Varrasso

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