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Effect of the configuration of the pouring nozzle on the flow of the melt in a thin slab undergoing solidification

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Results are presented from an analysis of flows of a melt for two widely used types of pouring nozzles designed especially for the continuous casting of thin steel slabs. The theoretical predictions that are obtained are reliable because the computations were performed using an advanced method of calculating turbulent flows that is based on the K–ε model and the universal numerical method of finite elements. It is shown that the use of a closed-bottom nozzle ensures that the melt will flow rapidly over the covering slag at the meniscus, which makes it possible to remove nonmetallic inclusions from the steel. At the same time, the high rate of flow of the melt along the solid skin of the semifinished product can result in excessive deformation of the skin by the jet of superheated alloy. The jet penetrates deep into the body of the semifinished product when a direct-flow nozzle is used. This prevents almost any of the nonmetallic inclusions from ascending to the meniscus and the covering slag, which would allow further refining of the steel. On the other hand, the low rate of flow of the melt along the skin near the narrow faces of the slab makes it less likely that the skin will be deformed or have its growth impeded.

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  1. Research Institute of Metallurgical Heat Engineering (VNIIMT), 16 Studencheskaya St., 620219, Ekaterinburg, Russia

    Yu. A. Samoilovich

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  1. Yu. A. Samoilovich
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Correspondence to Yu. A. Samoilovich.

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Translated from Metallug, No. 6, pp. 51–56, June, 2009.

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Samoilovich, Y.A. Effect of the configuration of the pouring nozzle on the flow of the melt in a thin slab undergoing solidification. Metallurgist 53, 348 (2009). https://doi.org/10.1007/s11015-009-9185-5

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  • DOI: https://doi.org/10.1007/s11015-009-9185-5

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