Modeling of Solidification in Continuous Casting Round Billet with Mold Electromagnetic Stirring (M-EMS)

摘要

A fully couple flow of molten steel, heat transfer, and solidification in the mold region of a continuous casting round billet under mold electromagnetic stirring (M-EMS) are investigate with computational tools of fluid flowand electromagnetic simulations. A finite elementmodel is employed to simulate the electromagnetic stirrer in themold and calculate the Lorenz force distribution. The Lorenz forces are applied as a source termin the Navier-Stokes equations of the fluid flow model, which was solved through a finite volume model. The flow pattern produced by the stirrer is mainly rotational, with velocities of 0.37ms(-1) close to the solidifying shell for the higher current. The results indicate that a higher M-EMS current produces a reduction of the temperature in the strand center; a decrease of 42 degrees C is observed for a current of 350 A/4.25Hz. The M-EMS also produces a thinner shell close to the stirrer center and a larger region of solid fraction in the billet center.