Effect of Inflow Rate Variation on Intermixing in a Steelmaking Tundish during Ladle Change‐Over. Issue 6 (8th September 2015)

• Record Type: Journal Article
• Authors: Siddiqui, Md Irfanul Haque; Jha, Pradeep Kumar
• Is Part Of: Steel research international. Volume 87:Issue 6(2016)
• Page Start: 733
• Page End: 744
• Publication Date: 2015-09-08
• Subjects: grade mixing -- volume of fluid -- bath height -- tundish; Steel -- Periodicals; Steel -- Metallurgy -- Periodicals; 669.142
• DOI: 10.1002/srin.201500210
• Languages: English
• ISSNs: 1611-3683

Abstract

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. Abstract : The intermixing of the grades is kept to a minimum during sequential casting of different grades. Numerical and water model investigations of the three‐dimensional turbulent fluid flow in a multi‐strand tundish have been carried out by using Volume of Fluid (VOF) method to study the effect of inflow rate on grade mixing. The figure shows the tracer concentration in tundish.