Desenvolvimento De Simulação Fluidodinâmica Em Panela Com Lança De Injeção Submersa

Abstract

For the development of the computational fluid dynamic (CFD) simulation of the ladle desulphurization process with reagent injection through a submerged lance, the calibration of interphase forces is essential to obtain a reliable prediction, which allows the distribution of gas and reactant particles throughout the domain to be known. In this work, using numerical simulations via CFX, the effect of lift, and turbulent dispersion forces in a 1:7 scale physical model of a 245ton industrial ladle was investigated. The distribution of gas predicted via CFD was assessed and validated with physical modeling results. The best combination of interphase forces was found by taking in account a virtual mass coefficient of 0.3, the turbulent dispersion force and a lift coefficient of 0.5. Mixing time was well predicted by the CFD simulations. The gas flow showed a great influence on the mixing time and offcentering the lance also reduced the mixing time.