Interaction of Potassium Oxide with Calcium Aluminate: Fid-Bau Portal

Interaction of Potassium Oxide with Calcium Aluminate

Erygina, A. O. / Mishin, D. A.

The main problem of cement production is the presence of circulation of alkaline compounds. Alkali metal salts are always present in the raw mix of cement production. As it is known, these compounds have a negative impact on the technological process of clinker production, contributing to the formation of rings in chain screens and accretions in cyclone heat exchange devices, and also worsen the strength indicators of cement. To solve the problems of neutralizing alkali metal salts, it is necessary to study the possible chemical interactions of these compounds with raw materials and clinker minerals formed during firing in a rotating furnace in all technological zones of the furnace unit. If chemical interactions in the range of temperatures up to 1100 and above 1300 °C have been studied by many researchers, the range of 1100–1300 °C has been not. This work is devoted to the study of possible interactions between one of the main clinker minerals (calcium aluminate) and potassium oxide, which is involved in the internal circulation of alkaline compounds. The study established firing products between C₄AF and K₂O at 1200 °C:

Stage 1 of the reaction:

\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ 4CaO \cdot A{l_2}{O_3} \cdot F{e_2}{O_3} + {K_2}O\mathop \to \limits^{1200^{{\circ}}{\rm C}} 2CaO \cdot F{e_2}{O_3} + {K_2}O \cdot A{l_2}{O_3} + 2CaO $$\end{document}

Stage 2 of the reaction:

\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ 2CaO \cdot F{e_2}{O_3} + {K_2}O\mathop \to \limits^{1200^{{\circ}}{\rm C}} {K_2}O \cdot F{e_2}{O_3} + 2CaO. $$\end{document}

These reactions can occur at firing temperatures corresponding to the zone of exothermic reactions of a rotating cement furnace, with the arranged return of dust from the hot end of the furnace.

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Interaction of Potassium Oxide with Calcium Aluminate

Erygina, A. O. / Mishin, D. A.

Abstract

Stage 1 of the reaction:

Stage 2 of the reaction:

\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ 2CaO \cdot F{e_2}{O_3} + {K_2}O\mathop \to \limits^{1200^{{\circ}}{\rm C}} {K_2}O \cdot F{e_2}{O_3} + 2CaO. $$\end{document}

These reactions can occur at firing temperatures corresponding to the zone of exothermic reactions of a rotating cement furnace, with the arranged return of dust from the hot end of the furnace.

Interaction of Potassium Oxide with Calcium Aluminate

Erygina, A. O. / Mishin, D. A.

Abstract

Stage 1 of the reaction:

Stage 2 of the reaction:

\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ 2CaO \cdot F{e_2}{O_3} + {K_2}O\mathop \to \limits^{1200^{{\circ}}{\rm C}} {K_2}O \cdot F{e_2}{O_3} + 2CaO. $$\end{document}

These reactions can occur at firing temperatures corresponding to the zone of exothermic reactions of a rotating cement furnace, with the arranged return of dust from the hot end of the furnace.