9/17/2023 0 Comments Viscosity calculationA forthcoming report will describe glass characterization and melter feeding, operation, and glass pouring. After initial tests with soda-lime-silica (SLS) feed, three melter volumes of glass were produced from the surrogate feed. Surrogate Oak Ridge Reservation (ORR) B&C pond sludge was treated in a demonstration of the TVS system at Clemson University and at ORR. The TVS consists of a feed preparation and delivery system, a joule-heated melter, and an offgas treatment system. The Transportable Vitrification System (TVS) developed at the Savannah River Site is designed to process low-level and mixed radioactive wastes into a stable glass product. The objective of this study is to examine the ability of the soda-lime-aluminosilicate glass as an alternative vitrification tool for the disposal of radioactive waste and to investigate the sensitivity of product chemical durability to variations in composition. New insights in the mixed-alkali effect are = to the glass more ยป composition increases the environmental durability of the glass. The prediction 95% confidence interval for glass in mass production largely depends on the glass composition of interest, the composition uncertainty, and the viscosity level. The developed global model corrects those errors. Similarly, in the glass transition range many experimental data of borosilicate glasses are reported too high due to phase separation effects. (1972) and the recently published High temperature glass melt property database for process modeling by Seward et al. It is shown that within a measurement series from a specific laboratory the reported viscosity values are often over-estimated at higher temperatures due to alkali and boron oxide evaporation during the measurement and glass preparation, including data by Lakatos et al. A global statistical glass viscosity model was developed for predicting the complete viscosity curve, based on more than 2200 composition-property data of silicate glasses from the scientific literature, including soda-lime-silica container and float glasses, TV panel glasses, borosilicate fiber wool and E type glasses, low expansion borosilicate glasses, glasses for nuclear waste vitrification, lead crystal glasses, binary alkali silicates, and various further compositions from over half a century.
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