Springer Online Journal Archives 1860-2000
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Conclusions A production test was made in the roof of a 180-ton open hearth of periclase-chromite parts produced by the Magnesite Combine from electrofused periclase-chromite. The life of the roof of experimental parts was an average of two campaigns of 690 heats, which is three times longer than the life of PKhS refractories produced by the Nizhnii Tagil Metallurgical Combine. The difference in the life of the two forms of refractories may be explained by features of their phase composition, structure, and failure mechanism. It was shown that the main improvement in the quality of the refractories is a significant reserve for increasing the life of open hearth roofs. The use in open hearth roofs of parts of electrofused periclase-chromite makes it possible to decrease the refractory consumption by 3.36 kg per ton of steel and to reduce the cost of a ton of steel by 0.05 rubles. It is necessary to continue work in the direction of production and use of refractories of pure sintered and fused original materials, especially in the local areas subject to the maximum wear of the roofs of open hearths in which high quality steel is melted.
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