A Study on the Correlation of Structure and Fluidity of Three Asian Coal Ashes and Slags

概要

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Correlations among structures and flow properties of three typical Asian coal ashes and their slags were carefully examined using multi-nuclear solid-state NMR and self-manufactured viscometer. The amorphous structures of slags were successfully quantified through the NMR measurement. The Si structure of slag D which showed highest viscosity among three slags was mainly Q^4 structures with a high degree of polymerization. Slag M which contained high Fe content showed similar Si structure to that of slag D. Alkaline-earth ions of Ca^<2+> and Mg^<2+> in slag A successfully segmented the framework to form the primary Q^2 structures, which resulted in the lowest viscosity of slag A.