Heat transfer from glass melt to cold cap: Gas evolution and foaming

0517154 - ÚSMH 2020 RIV US eng J - Článek v odborném periodiku
Hrma, P. - Kloužek, Jaroslav - Pokorný, R. - Lee, S.M. - Kruger, A.A.
Heat transfer from glass melt to cold cap: Gas evolution and foaming.
Journal of the American Ceramic Society. Roč. 102, č. 10 (2019), s. 5853-5865. ISSN 0002-7820. E-ISSN 1551-2916
Institucionální podpora: RVO:67985891
Klíčová slova: cold cap * feed‐to‐glass conversion * foam * gas evolution
Obor OECD: Ceramics
Impakt faktor: 3.502, rok: 2019
Způsob publikování: Omezený přístup
https://ceramics.onlinelibrary.wiley.com/doi/abs/10.1111/jace.16484

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 is still impossible in situ, that is, 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.
Trvalý link: http://hdl.handle.net/11104/0302441