Research The Flow Control Devices Of Four-strand T-shape Tundish For Beam And Bloom Continuous Casting

Tundish is the most important device in continuous casting process, and it is thelast vessel for the molten steel before entering mold. The flow field of molten steel inthe tundish determined the quality of steel. Application of flow control device is one ofthe main measures for the modern “tundish metallurgy”, it is necessary to improve theflow field of molten steel in tundish and the quality of casting blank.Mathematical modeling and water modeling were used to study the structure of afour-strand T-shape tundish for beam and bloom continuous casting. The weirs andturbulent inhibitors were studied in this paper, focusing on the mean residence time, firstresponed time, and the uniform of molten steel from the nozzles. The results indicatethat weirs can improve the flow field in the tundish significantly and turbulent inhibitorcan induce the erosion of tundish and uniform the velocity in the impacting zone. Thereare some problems in the application of oval-shaped turbulent inhibitor andcycloidal-shape turbulent inhibitor in the four-strand T-shape tundish. The application ofoval-shaped turbulent inhibitor in the tundish will cause the asymmetric flow and vortexon the level which may induce the slag entrapment. The application of cycloidal-shapeturbulent inhibitor will induce the strong turbulent in the impacting zone and erosionserious, which may reduce the life of turbulent inhibitor.The best flow control device for the four-strand T-shape tundish is the weir and theparameters are: diameter of holes is100mm, horizontal angle is25°, the back angle is15°and35°.