Numerical Simulation of Gas-Liquid Flow Mixing Effect in Bottom-Blown Bath

摘要

In order to clarify the stirring mechanism of a bottom-blown bath, the volume of fluid (VOF) multiphase flow model was used to simulate the gas-liquid two-phase flow process. The simulation results were verified by water model test, and the influence of gas-liquid mixed melt process was analyzed. The results show that the separation effect of matte is better when the injection angle is between 15° and 22.5°. When the gas velocity is 70 m/s, the gas stirring radius is 1 m, so the distance between the oxygen lance and the furnace wall is 1-1.5 m, which can ensure that the furnace wall is not washed by excessive melt. The optimum spacing of the oxygen lance is controlled at 2-3 m, the distribution of oxygen lances is more reasonable, the effect of bath agitation is better, and the splash caused by excessive bath agitation is prevented.