3D simulation of a 500 kg UO2 melt in a cold crucible induction furnace

Sauvage, E.; Brun, Pierre Le; Lacombe, J.; Aufore, Laurence

doi:10.22364/mhd.53.2.5

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…Unfortunately, this is not the case of the cold cap region of melters. Mathematical models have successfully simulated fluid flow and heat transfer in the melt pool and furnace atmosphere to address energy economy, glass product quality, and environmental pollution issues, [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] but the heat transfer from the melt pool to the cold cap has not been the main focus. Even though certain aspects of glass processing have been studied in minute detail, [23][24][25] the complexity of chemical and physical phenomena occurring in the batch blanket and at the batch-melt and batch-gas interfaces present formidable obstacles to executing realistic models.…”

Section: Introductionmentioning

confidence: 99%

Glass production rate in electric furnaces for radioactive waste vitrification

et al. 2019

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Correlating the melting rates of feeds in electric melters with results of simple laboratory experiments can help evaluate melter feed additives and their effects on melting rate, and support the feed scheduling and plant operation. A recently proposed melting rate correlation (MRC) equation, relating the melting rate to melt viscosity, feed‐to‐glass conversion heat, and cold‐cap bottom temperature, was tested using data from experiments covering various feed compositions and melter operating parameters. The MRC equation is shown to reasonably represent the measured data and thus can be used to quantify how individual variables (melt viscosity, cold‐cap bottom temperature, conversion heat, melter operating temperature, and bubbling flux) affect the glass production rate.

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Section: Introductionmentioning

confidence: 99%

Glass production rate in electric furnaces for radioactive waste vitrification

et al. 2019

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“…Finally, the disappearance of solids can be used to define the end of batch conversion in the absence of a cold cap in melters where a mechanical stirrer mixes the batch directly into the melt . This method is effective when the batch is calcined (to avoid excessive foaming) and then charged into an induction heated melter . In that case, the Sherwood number, a dimensionless form of the mass transfer coefficient, h , Equation (), is a function of particle diameter and diffusivity …”

Section: Kinetic Limited Modelsmentioning

confidence: 99%

Modeling batch melting: Roles of heat transfer and reaction kinetics

et al. 2019

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Development of mathematical models of heat and mass transfer in glass‐melting furnaces began in the 1970s and progressed rapidly with advances in sophisticated experimental/numerical techniques and increasing computational power. Today, practically all newly built or rebuilt furnaces are optimized with these models to meet stringent quality requirements, reduce the unit costs of manufacturing, or control emissions. One remaining hurdle is to model the batch‐to‐glass conversion accurately enough to reliably assess the glass production rate. This article summarizes two key aspects of the batch‐conversion modeling—the heat transfer and the kinetics of conversion—and reviews the current state‐of‐the‐art approaches to simulating them. We critically examine the advantages of the commonly used heat transfer approach, but also explain that its predictive capabilities are significantly restricted by the dependence of batch thermal properties on the time‐temperature history. We argue that kinetic approaches to the batch‐conversion modeling would offer a significant improvement when coupled with the heat transfer approach. Finally, we summarize key areas requiring further research on the way toward a realistic model of the batch blanket.

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3D simulation of a 500 kg UO2 melt in a cold crucible induction furnace

Cited by 2 publications

References 9 publications

Glass production rate in electric furnaces for radioactive waste vitrification

Glass production rate in electric furnaces for radioactive waste vitrification

Modeling batch melting: Roles of heat transfer and reaction kinetics

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