Ceramics-Silikáty 46, (4) 127 - 132 (2002) |
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SPINEL CRYSTAL DISTRIBUTION AND SETTLING IN A HIGH-LEVEL WASTE MELTER WORKING AS A PERFECT MIXER: PART 2. RESULTS OF CALCULATIONS
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Jiřička Miloš, 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: Particle settling, High-level waste, Perfect mixer
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The developed models of crystal distribution and settling in a vitrification space working either as the perfect mixer or space
with the piston flow were applied to compare their results with the numerical mathematical model of the real vitrification
space. In this study, the influence of temperature, initial spinel crystal size and concentration in the batch, glass liquidus temperature
and melter pull rate on the thickness of the crystal layer were examined. The results demonstrated the decisive role
of the initial crystal size and character of the melt flow on the crystal settling rate and crystal layer growth. The comparison
of results of both models has shown that the real vitrification space behaves similarly as the combination of the short-term
piston flow and the subsequent perfect mixer. |
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