Conclusions
As a result of chemical reaction between chamotte and zinc oxide, zinc aluminate ZnAl2O4 and zinc silicate Zn2SiO4 are formed.
The mullite is not chemically resistant under the action of zinc oxide. Even at 900°C mullite reacts with zinc oxide, forming ZnAl2O4 and SiO2.
In accordance with the quantity of melt formed in the refractory under the action of zinc oxide, high-alumina products should be more resistant to the action of vapors and oxides of zinc at elevated temperatures than chamotte and semiacid refractories.
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Literature cited
L. B. Romanovskii et al., Chemical Technology [in Russian], No. 4, Izd. Khar'kov Un-ta (1966).
N. S. Uglikova and V. A. Perepelitsyn, Ogneupory, No. 1, 26 (1968).
L. I. Karyakin, Trans. 3rd Conference of Experimental Mineralogy and Petrography, Izd. AN SSSR (1940), p. 60.
R. L. Pevzner, Ogneupory, No. 1, 38 (1945).
D. S. Belyankin et al., Physicochemical Systems in Silicate Technology [in Russian], Promstroiizdat (1954), p. 177.
P. P. Budnikov and A. M. Ginstling, Reactions in Mixtures of Solids [in Russian], Gosstroiizdat (1961), p. 325.
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Translated from Ogneupory, No. 7, pp. 36–39, July, 1971.