Ceramics-Silikáty 46, (3) 81 - 85 (2002) |
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SPINEL CRYSTAL DISTRIBUTION AND SETTLING IN A HIGH-LEVEL WASTE MELTER WORKING AS A PERFECT MIXER:
PART 1. THEORETICAL RELATIONS
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Němec Lubomír, Jiřička Miloš
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Laboratory of Inorganic Materials
Joint workplace of the Institute of Inorganic Chemistry ASCR and Institute of Chemical Technology in 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 mathematical and laboratory modeling of the high-level waste vitrification process is able to reveal the mechanism of
spinel crystal formation, their interaction with a melt and settling. This enables to find conditions for higher waste loading
into vitrification facility. A model of a perfect mixer has been developed by authors with the aim to examine the crystal settling
and to compare results with the numerical mathematical model. This model is based on the mass balance of inputted,
outputted, nucleated, growing or dissolving and settling crystals in the melting space. To complete the description of possible
melter behavior, similar relations were derived and are presented for the piston flow in the melter. |
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