Cold-cap structure in a slurry-fed electric melter

Ferkl, Pavel; Hrma, Pavel; Kloužek, Jaroslav; Kruger, Albert A.; Pokorný, Richard

doi:10.1111/ijag.16645

Title: Cold-cap structure in a slurry-fed electric melter

Journal Article · 22 September 2023 · International Journal of Applied Glass Science

DOI: https://doi.org/10.1111/ijag.16645 · OSTI ID:2301566

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Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
US Department of Energy (USDOE), Richland, WA (United States).Support Services Contractor to the Office of River Protection
University of Chemistry and Technology, Prague (Czech Republic); Czech Academy of Sciences (CAS), Prague (Czech Republic)
US Department of Energy (USDOE), Richland, WA (United States). Office of River Protection

We report as glass batch is charged into an electric melter, a cold cap forms on the glass melt surface. Heat transfer to the cold cap from the molten glass below and the melter atmosphere above determines the melting rate. A mathematical model of the cold cap and the experimental kinetic data of the feed-to-glass conversion that were collected for several simulated low-activity and high-level waste melter feeds allowed us to develop relationships between the internal structure of the cold cap, its properties, its thickness, and the internal heat transfer. This contribution shows the distribution of major crystalline phases and the cumulative evolution of gases within the cold cap. It also examines the temperature, conversion degree, and heating rate the melter feed is experiencing during the passage through the cold cap and their effects on the cold-cap bottom temperature and morphology, which are important for the computational fluid dynamics simulations of melters.

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Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE Office of Science (SC); Czech Ministry of Education, Youth and Sports

Grant/Contract Number:: AC05-76RL01830; AC07-05ID14517

OSTI ID:: 2301566

Report Number(s):: PNNL-SA-185608

Journal Information:: International Journal of Applied Glass Science, Vol. 15, Issue 1; ISSN 2041-1286

Publisher:: American Ceramic SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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