Intensification of liquid steel active flow volume in one-strand tundish using a modified ladle shroud

Abstract

This work presents the numerical and physical simulation results of the liquid steel flow in the one-strand tundish. The results obtained during the numerical simulations and the water modeling results were compared to each other. Six types of turbulence models were tested. Among tested turbulence models the BSL k-ω was turned out the best correlating with the results from the laboratory experiments. Besides, the ladle shroud modification was proposed by the authors and the influence of the modified ladle shroud immersion depth in the liquid steel on the hydrodynamic structure in the tundish was checked. The ladle shroud modification depended on the expansion, narrowing, and re-expansion of the liquid steel feed stream. The four tundish variants with the four different ladle shroud immersion depths (at 0.1, 0.2, 0.3 and 0.4 m) in the liquid steel were tested. The liquid steel flow volumes were calculated and according to the generated active flow volume, the most beneficial research case was indicated. The tundish variant with the ladle shroud immersion depth of 0.3 m in the liquid steel was characterized by the lowest stagnant flow volume. The numerical simulations were performed by using the Ansys-Fluent computer program.

Challenge of Residence Time Distribution Curve in Tundish for Continuous Casting of Steel

“…Bartosiewicz et al [24] 1 KCl Saturated -2 F-Curve -Yazdi et al [25] 4 NaCl Saturated 50 2 E-Curve Zheng Cwudzinski et al [26] 1 KCl Saturated -3.5 F-Curve -Chatterjee et al [27] 4 NaCl…”

“…In the last 40 years, there are numerous documents about the E ‐curve obtained by pulse input of tracer, but there are few articles about F ‐curve obtained by step input of tracer. [ 24,26,77,78 ] By definition, [ 77,78 ] the relation between E ‐curve and F ‐curve can be expressed as follows. …”

“…In the last four decades, most metallurgists used the NaCl solution as the tracer in the water model, [ 22,25,27–30 ] some metallurgists used the KCl solution, [ 23,24,26,31 ] and some metallurgists used the dye, [ 17,43,73,74,80 ] while a few studies used the acid. [ 42,79 ] Such phenomena come from the following reasons.…”

Numerical Analysis of RTD Curves and Inclusions Removal in a Multi-Strand Asymmetric Tundish with Different Configuration of Impact Pad

“…The last point where the amount of non-metallic inclusions in the steel melt can be modified during continuous casting is mainly the tundish. Therefore, a number of studies are devoted to the optimization of the flow in the tundish using different weirs and dams [17][18][19][20][21][22][23][24][25], impact pads (e.g., [26,27]), ladle shroud [28], or argon injection [29][30][31]. To study the steel flow, the authors usually utilize the knowledge of experimental measurements or modelling methods, both physical and numerical (e.g., [32]).…”