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

Hrma, Pavel R.; Klouzek, Jaroslav; Klouzek, Jaroslav; Pokorny, Richard; Lee, Seung Min; Kruger, Albert A.

doi:10.1111/jace.16484

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

Journal Article · Tue Oct 01 00:00:00 EDT 2019 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/jace.16484· OSTI ID:1571518

Hrma, Pavel R. ^[1]; Klouzek, Jaroslav ^[2]; Klouzek, Jaroslav ^[2]; Pokorny, Richard ^[3];

^[4]; Kruger, Albert A. ^[5]

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.

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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, Vol. 102, Issue 10

Country of Publication:: United States

Language:: English

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