Conclusions
The feasibility was demonstrated of producing chrome-containing magnesia spinel from a mixture of the by-products of chemical processes and magnesite. The composition of this spinel is similar to that of spinel fused from a mixture of commercial alumina, magnesite, and chromite. The fused spinel from the by-products contains a large proportion of SiO2 and correspondingly less FeO + Fe2O3 than spinel fused from commercial alumina.
The properties of magnesite-spinel refractories based on fused and sintered spinels from the by-products were investigated and compared with those of specimens based on fused and sintered spinels from alumina. The properties of the products containing fused spinels from the by-products proved to be good and similar to those of products containing fused spinel from alumina.
Fused spinel from the by-products can be used also as starting material for the production by the ceramic method of spinel brick with good properties.
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Translated from Ogneupory, No. 6, pp. 33–39, June, 1974.
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Shapiro, Y.Z., Degtyareva, É.V., Kotel'nikov, G.R. et al. Magnesite-Spinel products from fused materials with by-products from chemical processes. Refractories 15, 366–371 (1974). https://doi.org/10.1007/BF01284171
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DOI: https://doi.org/10.1007/BF01284171