Ceramics-Silikáty 52, (3) 155 - 159 (2008) |
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THE ROLE OF SULFUR IN GLASS MELTING PROCESSES
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Arkosiová Miroslava, Kloužek Jaroslav, Němec Lubomír
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Laboratory of Inorganic Materials
Joint Workplace of the Institute of Inorganic Chemistry of the Academy of Sciences
of the Czech Republic and the Institute of Chemical Technology Prague,
Technická 5, 166 28 Prague, Czech Republic
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Keywords: Sulphur, Glass melting, Bubble nucleation, Foaming, Sand dissolution
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This work is aiming to complete the kinetic data of bubble behavior and nucleation at different redox state controlled by different
ratios between carbon and sulphate added to the batch of the soda-lime-silica glass, to elucidate the mechanism of melt
foaming at medium temperatures and to provide experimental data showing the effect of sulfur reactions on the sand dissolution.
Two generations of bubbles nucleated in the glass melt were indicated by measurements and the bubble growth rates
were obtained at temperatures 1300-1500°C to appreciate the bubble fining process and glass foaming. The chemical reaction
between water vapour atmosphere and sulfur compounds in glass resulted in bubble nucleation on the glass level and
melt foaming. The acceleration of sand dissolution in glasses having lower redox state was observed. |
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