Stirring Effect of Bottom Regiments Arrangement on the Molten Pool in a 260 t Converter

Abstract

For this article, the bottom regiments distribution is designed to investigate the instantaneous kinetic energy of molten pool with the help of numerical simulation. The results indicate that the time required for kinetic energy to reach the stable state is affected by the angle among regiments. When the blowing gas flowrate is 720 Nm³·h⁻¹, the shorter equilibrium time is 66 s with the angle of 15°. Meanwhile, the higher kinetic energy of 2915 J has been discovered as the outer regiments kept at a pitch circle diameter ratio of 0.5, which reflects the preferable internal dynamic conditions of liquid steel. While the molten pool can get enough stirring force, and the outer cluster should not be arranged closely to the furnace wall to avoid unnecessary energy dissipation. Besides, the weak stirring zones inside the bath can be reduced by the elevation of blowing gas intensity, and the proportions of the proper scheme are 0.84, 0.74, 0.69, and 0.67 under four diverse operation conditions, respectively.