Evaluation of Gas-Fired Immersion Tube Materials for Glass Melting Furnaces.Final Report, September 1, 1992-April 1, 1994

摘要

Materials were developed for the application of immersed heating of molten glassusing natural gas. The mechanisms of corrosion in molten glass (E-glass and soda-lime-silicate glass) at 1560 degrees C and combustion products at 1600 Degrees C were established experimentally, and confirmed with thermodynamic models for a number of candidate materials. A tube wall made of a functional gradient of MoSi2 contact with oxidizing gases, and Mo in contact with glass was devised and demonstrated. A method of corrosion protection was devised involving applying a cathodic potential to the immersed tube. Heat transfer models showed that convective heat transfer from combustion products to the tube was rate limiting. Suggested tube processing methods were slip casting and plasma spraying.