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Thermo-rheological snapshot of melter feed conversion to glass

Journal Article · · Journal of the American Ceramic Society
DOI:https://doi.org/10.1111/jace.20208· OSTI ID:2513898
 [1];  [1];  [1];  [1];  [1];  [2];  [1];  [3];  [4]
  1. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
  2. USDOE Office of River Protection (ORP), Richland, WA (United States); AttainX Inc., Herndon, VA (United States)
  3. USDOE Office of River Protection (ORP), Richland, WA (United States)
  4. University of Chemistry and Technology, Prague (Czech Republic); Czech Academy of Sciences (CAS), Prague (Czech Republic)
Slurry feed charged into an electric melter creates a layer of reacting and melting material (termed cold cap) that floats on the surface of molten glass. The rheological behavior of heated melter feed affects the spreading of slurry at the top of the cold cap and the stability of the primary foam, affecting cold-cap coverage and melter plenum temperatures. The apparent viscosity of a high-alumina high-level waste melter feed was assessed by thermomechanical analysis, high-temperature viscometer, and the hot stage microscopy method, yielding viscosity estimates from ≈107.5 Pa s at 550°C to ≈102.5 Pa s at 1050°C. As the temperature of feed materials increased, their state changed from rigid solid to dilatant fluid, to pseudoplastic bubbly liquid with dissolving solids, to fully developed foam, and finally to Newtonian glass melt.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
Ministry of Education, Youth and Sports of the Czech Republic (MEYS); USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
2513898
Report Number(s):
PNNL-SA--186061
Journal Information:
Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 3 Vol. 108; ISSN 0002-7820
Publisher:
American Ceramic SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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