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X‐ray imaging of a high‐temperature furnace applied to glass melting

Boloré, Damien and Gibilaro, Mathieu and Massot, Laurent and Chamelot, Pierre and Cid, Emmanuel and Masbernat, Olivier and Pigeonneau, Franck X‐ray imaging of a high‐temperature furnace applied to glass melting. (2019) Journal of the American Ceramic Society. 1-14. ISSN 0002-7820

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Official URL: https://doi.org/10.1111/jace.16809

Abstract

The dynamics of soda‐lime‐silica glass grain melting is investigated experimentally using a nonintrusive technique. A cylindrical alumina crucible is filled with glass cullet and placed into a furnace illuminated by an X‐ray source. This glass granular bed is gradually heated up to 1100°C, leading to its melting and the generation of a size‐distributed population of bubbles rising in the molten glass. An image processing algorithm of X‐ray images of the cullet bed during melting allows the characterization of bubbles size distribution in the crucible as well as their velocity. The introduction of tin dioxide μ‐particles in the glass matrix before melting enhances the texture of the images and makes possible the determination of the bubble‐induced molten glass velocity field by an optical flow technique. The bubble size distribution can be fitted by a log‐normal law, suggesting that it is closely related to the initial size distribution in the cullet bed. The liquid motion induced by the bubbles in Stokes' regime is strongly affected by the flow confinement and the determination of bubble rising velocity along its trajectory unveils the existence of local tiny temperature fluctuations in the crucible. Overall, the measuring techniques developed in this work seem to be very promising for the improvement of models and optimization of industrial glass furnaces.

Item Type:Article
HAL Id:hal-02309775
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Saint-Gobain (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Mines ParisTech (FRANCE)
Other partners > PSL Research University (FRANCE)
Laboratory name:
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Deposited On:09 Oct 2019 13:30

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