Glass production rate in an electric melter: Melting rate correlation and primary foam stability

•The melting rate of nuclear waste glass depends on primary foam bottom temperature.•The primary foam stability depends on transient viscosity and homogeneity.•Silica particles stabilize or destabilize primary foam depending on their location.•Particles stabilize foam in Plateau borders and destabil...

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Bibliographic Details
Published inMaterials letters Vol. 369; p. 136689
Main Authors Hrma, Pavel, Ferkl, Pavel, Pokorný, Richard, Kruger, Albert A.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.08.2024
Subjects
Cold cap
Electric melting
Foam
Shear rate
Viscosity
Waste glass
Viscosity
Cold cap
Foam
Electric melting
Waste glass
Shear rate
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Summary:•The melting rate of nuclear waste glass depends on primary foam bottom temperature.•The primary foam stability depends on transient viscosity and homogeneity.•Silica particles stabilize or destabilize primary foam depending on their location.•Particles stabilize foam in Plateau borders and destabilize it in foam cell lamellas.•Shear stress by melt flow destabilize primary foam and promotes melting rate. Waste loading and melting rate are major factors determining the lifecycle of nuclear waste disposal by vitrification in electric melters in which the heat to the cold cap is delivered from the melt pool. One of the crucial parameters that affect the rate of melting is the temperature at which the primary foam collapses at the cold cap bottom. Apart from the transient glass-forming melt viscosity, primary foam stability is affected by the shear stress imposed by the flow in the melt pool and the presence of residual solid particles.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2024.136689