Conclusions
Macroscopic and microscopic investigations of MShS refractories after service and direct observations of their behavior in the roof of open-hearth furnaces fired with oxygen-enriched fuel showed that MShS bricks containing 20 and 30% fused spinel are eroded by the sweating of the working surface.
An increase in the spinel content of the mix for MShS refractories from 30 to 60% produces a tendency to erosion by spalling, the explanation being the reduced volumetric stability of the brick which manifests itself in aftershrinkage and distension as a result of the action of iron oxides.
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Translated from Ogneupory, No. 4, pp. 26–33, April, 1977.
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Pyatikop, P.D., Shapovalov, V.S. & Antonov, G.I. Analysis of magnesite — Spinel refractories after service in the roof of an open-hearth furnace. Refractories 18, 217–223 (1977). https://doi.org/10.1007/BF01281602
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DOI: https://doi.org/10.1007/BF01281602