Conclusions
During service, abundant saturation of the lining by components of the melting region is observed. The amount of silicates in the slag belt reaches 40–60% and in the high-lying lining — 10–15%.
In regard to composition of the silicate bond in the working zones the lining is divided in height into two zones: the slag belt and the high-lying part. In the slag belt the bond is composed chiefly of cuspidine and fluorite; in the high-lying part — of dicalcium silicate and glass.
Formation in the silicate bond of cuspidine and fluorite is due to the high rate of wear of the lining of the slag belt.
In refractories of high density there is a smaller zone impregnated with reagents of the melting region, and so there is less wear during service.
Further increase in the life of the lining can be obtained by using refractories with a minimum porosity in the slag belt and opposite the hot-phase arc; such refractories include fusion-cast blocks.
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Kaibicheva, M.I., Pivnik, L.Y. The nature of the destruction and method of increasing the resistance of electric furnace linings. Refractories 4, 282–291 (1963). https://doi.org/10.1007/BF01370993
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DOI: https://doi.org/10.1007/BF01370993