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- W4225122322 abstract "This article investigated the effect of Na 2 O on the viscosity and structure of CaO–SiO 2 –MgO–Al 2 O 3 –BaO–Na 2 O slag. To understand the stability of slag at high temperatures, the “excessive heat of slag” was calculated. The structure of slag was analyzed using Raman and 27 Al magic angular spinning nuclear magnetic resonance (MAS-NMR) techniques. The results showed that the viscosity decreased with an increase in Na 2 O content in the range of 0 to 4 wt%, while the excessive heat of slag increased because the effect of slag composition on its heat capacity was more significant than that of temperature. From the perspective of heat supply, it should increase the fuel ratio of the blast furnace to ensure a stable furnace temperature when raising Na 2 O content. The mole fraction of Q Si 0 (Q Si n , n is the number of bridging oxygen in a [SiO 4 ]-tetrahedron) and Q Si 2 increased gradually, whereas that of Q Si 3 decreased obviously. The [SiO 4 ]-tetrahedral structures were depolymerized, which reduced the number of bridging oxygen. Simultaneously, the increment in non-bridging oxygen caused the transformation from AlO 4 to AlO 5 and AlO 6 , thus decreasing the fraction of the network former (AlO 4 ). The connection between [SiO 4 ] and AlO 5 or AlO 6 weakened the strength of the network structure and increased the proportion of the Al–O bond." @default.
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- W4225122322 date "2022-08-01" @default.
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- W4225122322 title "Influence of Na2O on the thermodynamics properties, viscosity, and structure of CaO–SiO2–MgO–Al2O3–BaO–Na2O slag" @default.
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- W4225122322 doi "https://doi.org/10.1016/j.ceramint.2022.04.325" @default.
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