نتایج جستجو برای: nepheline syenite
تعداد نتایج: 414 فیلتر نتایج به سال:
Mold powders used in the continuous casting of steel contain the harmful CaF2 as a main substance developing toxic gases such as SiF4 and HF at elevated temperatures. In this study, three samples of I1, I2 and I3, which contained gypsum free Portland cement clinker with different percentages of Fe2O3 (5.68, 6.83, 8.02 ...
Grossular is a secondary mineral commonly observed in Al-lende CAIs associated with monticellite, wollastonite, forsterite, anorthite, and wadalite [1–6]. Studies of the 26 Al– 26 Mg systemat-ics in grossular yield (26 Al/ 27 Al) 0 ranging from ~5×10 –5 to <3×10 –6 suggesting grossular formation started almost contempo-raneously with crystallization of CAIs and lasted > 3 My [1–3]. This interpr...
Two types of refractory bricks were used in reaction tests with slag from a production kiln for iron ore pellet production. Electron microscopy was used to characterize morphological changes at the slag/brick interface and active chemical reactions. Phases such as kalsilite, nepheline and potassium β-alumina form, in a layered structure, as a consequence of alkali metals migration in the brick....
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