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Title: Heat Transfer from Glass Melt to Cold Cap: Gas Evolution and Foaming

Abstract

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.

Authors:
 [1];  [2];  [2];  [3]; ORCiD logo [4];  [5]
  1. EMERITUS PROGRAM
  2. Institute of Chemical Technology - Laboratory of Inorganic Materials - Czech Republic
  3. Institute of Chemical Technology in Prague
  4. BATTELLE (PACIFIC NW LAB)
  5. OFFICE RIVER PROTECTION
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1571518
Report Number(s):
PNNL-SA-138527
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of the American Ceramic Society
Additional Journal Information:
Journal Volume: 102; Journal Issue: 10
Country of Publication:
United States
Language:
English

Citation Formats

Hrma, Pavel R., Klouzek, Jaroslav, Klouzek, Jaroslav, Pokorny, Richard, Lee, Seung Min, and Kruger, Albert A. Heat Transfer from Glass Melt to Cold Cap: Gas Evolution and Foaming. United States: N. p., 2019. Web. doi:10.1111/jace.16484.
Hrma, Pavel R., Klouzek, Jaroslav, Klouzek, Jaroslav, Pokorny, Richard, Lee, Seung Min, & Kruger, Albert A. Heat Transfer from Glass Melt to Cold Cap: Gas Evolution and Foaming. United States. doi:10.1111/jace.16484.
Hrma, Pavel R., Klouzek, Jaroslav, Klouzek, Jaroslav, Pokorny, Richard, Lee, Seung Min, and Kruger, Albert A. Tue . "Heat Transfer from Glass Melt to Cold Cap: Gas Evolution and Foaming". United States. doi:10.1111/jace.16484.
@article{osti_1571518,
title = {Heat Transfer from Glass Melt to Cold Cap: Gas Evolution and Foaming},
author = {Hrma, Pavel R. and Klouzek, Jaroslav and Klouzek, Jaroslav and Pokorny, Richard and Lee, Seung Min and Kruger, Albert A.},
abstractNote = {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.},
doi = {10.1111/jace.16484},
journal = {Journal of the American Ceramic Society},
number = 10,
volume = 102,
place = {United States},
year = {2019},
month = {10}
}