C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
307/1
C03B 5/027 (2006.01) C03B 5/425 (2006.01) C03B 5/44 (2006.01) C03B 7/07 (2006.01) C03B 37/092 (2006.01)
Patent
CA 1218099
ABSTRACT OF THE DISCLOSURE A glass heating method and apparatus, such as a glass melting furnace or a forehearth, utilizing a re- fractory lining and electrically energized heating elect- rodes. The refractory lining is an erosion resistant material, preferably a chromic oxide refractory, having an electrical resistivity which is less than the re- sistivity of the molten glass, preferably an E glass, which is being heated. To avoid short-circuiting through the low resistance refractory, the refractory interposed between electrodes of opposite polarity is cooled to a temperature less than the temperature of the molten glass and at which the resistivity of the refractory is materially increased. Where the electrodes of opposite polarity are carried by opposing side walls, the end and/or side walls of the apparatus are cooled. Where the electrodes are all carried by a single wall, that wall is cooled.
453159
G. Ronald Bell & Associates
Owens Corning
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