Conclusions
The authors have devised a composition for gunited coatings with high thermal conductivity for protection of water-cooled structures in the linings of steel smelting systems at the points of contact with the slag. They show that addition of 20 or 40 wt. % of a heat-conductive filler, consisting of cast iron pellets measuring 2–5 mm, to magnesia guniting material increases the thermal conductivity of the gunited coatings by an average factor of 1.3 or 1.6, respectively.
The dependence of the thermal conductivity of the coatings on the bulk concentration of pellets is satisfactorily represented by the equations of Euchen and Odelevskii, which were derived for a two-phase system consisting of a continuous matrix with randomly distributed inclusions of spherical particles. High-thermal-conductivity gunited coatings were tested in service in a water-cooled screen in a vertical channel of a 500-ton open-hearth furnace at the Zaporozhstal' works.
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Translated from Ogneupory, No. 2, pp. 31–36, February, 1979.
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Pirogov, Y.A., Boltyanskii, A.V., Leveda, V.P. et al. Gunited coating with high thermal conductivity for water-cooled structures in steel works. Refractories 20, 97–102 (1979). https://doi.org/10.1007/BF01281939
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DOI: https://doi.org/10.1007/BF01281939