Dependency of Sulfate Solubility on Melt Composition and Melt Polymerization (U).

Jantzen, C. M. ; Smith, M. E. ; Peeler, D.K.

Technical Information Center Oak Ridge Tennessee

关键词: Sulfate;    Solubility;    Borosilicate glass;    Waste disposal;    Molten salts;   

RP-ID  :  DE2004830590

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Sulfate and sulfate salts are not very soluble in borosilicate waste glass. When sulfate is present in excess it can form water soluble secondary phases and/or a molten salt layer (gall) on the melt pool surface which is purported to cause steam explosions in slurry fed melters. Therefore, sulfate can impact glass durability while formation of a molten salt layer on the melt pool can impact processing. Sulfate solubility has been shown to be compositionally dependent in various studies, (e.g. , B2O3, Li2O, CaO, MgO, Na2O, and Fe2O3 were shown to increase sulfate solubility while Al2O3 and SiO2 decreased sulfate solubility). This compositional dependency is shown to be related to the calculated melt viscosity at various temperatures and hence the melt polymerization.