Effect of Inflow Rate Variation on Intermixing in a Steelmaking Tundish during Ladle Change‐Over

Abstract

The intermixing of dissimilar grades of steel in tundish during the ladle change-over is a problem of growing interest. During sequential casting of different grades, it is important that the intermixing of the grades is kept to a minimum. Present work deals with computational and water model studies of the three-dimensional turbulent fluid flow in a multi-strand tundish during ladle change-over process. The physical investigation has been carried out by conducting experiment on a 1:4 scale model of tundish. The numerical simulations have been carried out with the help of educational version of ANSYS Fluent, using the Volume of Fluid (VOF) method and incorporating standard k-ɛ turbulence model. The numerical model has been validated with the results of physical investigation and is found to be in good agreement. Further, the numerical model is used to study the ladle change-over process considering effect of inflow rate on grade mixing and interface positions, i.e., different bath height positions in tundish with and without advance pouring box (APB). It has been observed that the use of APB is not helpful in reducing the intermixed time while increase in flow rate of new grade steel decreases the intermixed amount.

Effect of Port Angle of Sen on Melt Flow in a Mold

“…1 The vast application of steel makes it production process important aspect of study. [2][3][4][5] The cleanliness of steel is a most required process of industry. 6 Various methods have been used to enhance the properties of steel during solidification.…”

Two-Phase Numerical Modeling of Grade Intermixing in a Steelmaking Tundish

“…In the present numerical modeling, modified High-Resolution Interface Capturing (HRIC) [34] scheme was used due to its better interface approximation and stability of the solution. The F-curves obtained from numerical models have been compared with the experimental results and further discussion on F-curves can be referred to from the authors that previously published a research article [20]. It was demonstrated that the numerical model was capable to reproduce the water-based laboratory results.…”

“…A correlation was developed to quantify the formation of mixed grade steel. Siddiqui and Jha [20] reported that the inflow rate has a significant impact on grade mixing in tundish during sequential castings. Cwudzinski [21] carried out a numerical investigation of flow control devices in tundish to modify the hydrodynamic pattern inside the tundish.…”

Online tool based on Tundish steel CFD model to monitor and minimise steel intermix in CC slabs

“…Different approaches are used and detailed in literature to minimize intermixing effects [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. They have been targeted at improving operating conditions and/or layout, even with suitable tools (e.g., particular ladle shroud geometry).…”