Heat Transfer from Glass Melt to Cold Cap: Gas Evolution and Foaming
Journal Article
·
· Journal of the American Ceramic Society
- EMERITUS PROGRAM
- Institute of Chemical Technology - Laboratory of Inorganic Materials - Czech Republic
- Institute of Chemical Technology in Prague
- BATTELLE (PACIFIC NW LAB)
- OFFICE RIVER PROTECTION
In electric melters, the conversion heat is transferred through the foam layer at the cold cap bottom. Understanding cold cap foaming is thus important for enhancing the efficiency of both commercial and waste glass melters as well as for the development of advanced batch-to-glass conversion models. Observing foam behavior “in-situ” is still impossible, i.e., viewing directly in glass melters. To investigate the feed foaming behavior in laboratory conditions, we employed the feed volume expansion test, evolved gas analysis, and thermogravimetry. Combining these techniques helps assess the cold cap bottom temperature that directly influences the temperature gradient at the melt/cold cap interface, and thus the rate of melting. We also discuss the behavior of cavities formed by coalescing primary foam bubbles and ascending secondary bubbles.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1571518
- Report Number(s):
- PNNL-SA-138527
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 10 Vol. 102
- Country of Publication:
- United States
- Language:
- English
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