ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 65, (4) 410 - 416 (2021)


VISUAL OBSERVATION OF FOAMING AT THE BATCH-MELT INTERFACE DURING MELTING OF SODA-LIME-SILICA GLASS
 
Kloužek Jaroslav 1,2, Cincibusová Petra 1,2, Vernerová Miroslava 1, 2, Marcial Jose 1, 2, Hrma Pavel 3, Pokorný Richard 1, 2
 
1 Laboratory of Inorganic Materials, University of Chemistry and Technology Prague, Prague 6, 166 28, Czech Republic
2 Institute of Rock Structure and Mechanics, Czech Academy of Sciences, Prague 8, 182 09, Czech Republic
3 AttainX, Support Services Contractor to the Office of River Protection, U.S. Department of Energy, Richland, WA, USA Submitted August 16, 2021

Keywords: Batch melting; Batch foaming; Foam decay; Visual observation
 

One of the least understood phenomena related to the optimization of the batch-to-glass conversion in melters is the behavior of the primary foam layer that develops at the interface between the batch and melt. Although its structure and behavior are directly linked with the heat and mass transfer between the reacting batch and melt, until recently, the foam layer at the batch bottom has eluded direct measurement. In this work, we build on our previous research addressing the primary foam behavior using high-temperature in-situ visual observation, and analyze its behavior at the batch-melt interface during melting of representative container soda-lime-silica glass. We visualize the formation of primary foam and its coalescence and collapse, leading to the formation of gas cavity layer at the batch bottom. The unprecedent contrast and resolution of the images provides detailed information on the foam morphology during melting, and can help in future development of more realistic batch melting models.


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doi: 10.13168/cs.2021.0044
 
 
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