Some Trends for The Tundish Refractory Lining

by Dr. P. Tassot, Ch. Turrel, G. Hsieh

Publisher - Calderys Corporate

Category - General Novel

The demand for cleaner steels increases every year. In addition to lowering non metallic oxide inclusions and controlling their morphology, composition and size distribution, clean steel requires lowering other residual impurity elements such as sulphur, phosphorus, hydrogen, nitrogen and even carbon. As such, the tundish is a metallurgical reactor in which a series of operations occurs that requires chemical, thermal, and physical control. The tundish has a very important role with regard to steel cleanliness, thermal homogeneity and in providing stable operation. The operation of a tundish needs to be geared to: • promote inclusion flotation by maximizing residence time; • ensure inclusion assimilation by a captive and noncorrosive slag; • prevent thermal and chemical losses from the melt; • minimize short-circuiting and dead zones; and • offer the steelmaker an optimal design for quality and yield.

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