Study of Molten Steel Solidification in Continuous Casting Slab Mold
A numerical simulation method was used in this article to study the turbulent flow and heat transfer coupled with solidification in mold by using volume of fluid (VOF) model and porosity method in the mushy zone. Comparisons of the flow field and the solid shell thickness in mold with different casting speeds and magnetic densities were given in this study. As results shown, solid shell does not distribute uniformly at the cross-section of mold. At the wide face, solid shell at the center is thicker than other part, but is relatively thin near the corner. Due to the jet impingement on the narrow face, the shell near the impingement point is the thinnest, which causes a zero increase of the shell thickness with the distance from free surface along the narrow face. Solid shells become thinner and thinner as the casting speeds increase. When the casting speed reaches to 1.5m/min, the shell at the impingement point is only about 1mm thick, which can easily cause the shell breakout and becomes a limitation to the increase of casting speeds. Using EMBR can effectively decrease the jet impingement on the narrow face but shift the jet a little upward. When the magnetic density is 0.2T, the shell thickness at the impingement point can increase to 5mm, which effectively minimize the possibility of the shell breakout. But for the wide face, using EMBR can make the erosion of the solid shell worse, which causes the shell thickness decrease at a wide scale. So a reasonable magnetic density must be chosen when using EMBR, to avoid the occurrence of local thin shells.
mold flow field solid shell EMBR
ZHAO Jing-jing CHENG Shu-sen WU Di-feng
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 10 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 10
国际会议
北京
英文
98-104
2008-11-04（万方平台首次上网日期，不代表论文的发表时间）