Quasi-Symmetric Transfer Behavior in an Asymmetric Two-Strand Tundish with Different Turbulence Inhibitor

Abstract

The task of the tundish is to supply and distribute the molten steel with the similar temperature and the similar inclusion mass concentration to the continuous casting mold. But it is difficult for the asymmetric tundish to accomplish this task. Thus, the scheme about the asymmetric turbulence inhibitor and the baffle wall with guided holes is proposed to optimize the tundish. In order to have a deep insight into the metallurgical behavior in the asymmetric tundish, numerical simulation is applied to describe the fluid flow, the heat transfer, RTD (residence time distribution) curve, and inclusion collision aggregation behavior. Numerical results show that the predicted temperature and inclusion concentration agree with the industrial experimental data. In the asymmetric two-strand tundish, the asymmetric turbulence inhibitor and the baffle wall with guided holes can extend the mean residence time at the left outlet, reduce the temperature difference between the two outlets, and prompt the inclusion removal rate at the left outlet.

Optimization of large capacity six-strand tundish with flow channel for adapting situation of fewer strands casting

“…In general, the large capacity tundish could make the molten steel flow state more complex, and it needed to be optimized by effective measures. On the one hand, it was important to install flow control devices such as turbulence inhibitor, weir and dam, or adopt new technologies such as electromagnetic stirring and argon blowing to improve the flow state of melt and the consistency of strands [5][6][7][8][9][10]. On the other hand, it was indispensable to find out specific and effective quantitative indicators to describe the flow characteristics of molten steel and to evaluate the quality of molten steel flow [11,12].…”

Synthesis of a CFD Benchmark Exercise: Examining Fluid Flow and Residence-Time Distribution in a Water Model of Tundish

“…CFD codes contain plenty of physical models for describing the turbulent flow, heat transfer, multi-phase interaction, and chemical reactions. In recent years, there have been a number of research works focusing on the CFD model application of the flow phenomena in tundish, such as residence time distribution [ 6 , 7 , 8 ], flow control device [ 9 , 10 , 11 ], inclusion behavior [ 12 , 13 ], and thermal status [ 14 , 15 , 16 ]. A series of CFD modelling studies have been recently published by the author through international collaborations [ 17 , 18 , 19 , 20 , 21 ].…”

Modeling of Fluid Flow and Residence-Time Distribution in a Five-Strand Tundish

“…A large number of mathematical modeling studies have been carried out to analyze the flow and the RTD in the tundish, including: (i) the study of FCD configurations; (ii) the study of external stirring (e.g., gas-stirring and electromagnetic stirring); (iii) the study of simulation model (e.g., fluid flow, turbulence, particle dispersion, isothermal/thermal, steady/transient). Several numeric simulation studies [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] of both fluid flow and RTD characteristics of the tundish have been presented in the literatures and summarized in Table 1. A diverse range of numeric modeling parameters (e.g., mesh size, steel flow rate, gas flow rate, inclusion size, installation of flow control devices, expression form of RTD) were applied to simulate flow characteristics in a wide range of tundish system.…”