熔池特性对转炉熔渣流场的影响

Influence of Molten Pool Characteristics on Converter Slag Flow Field

采用流场数值模拟软件模拟了转炉熔渣溅渣护炉气化脱磷过程,探究了熔池深度和熔渣粘度对熔池流动的影响。结果表明,熔池深度越深,越有利于湍动能转换率的提高和熔池内的混匀,优化流场。死区占比随熔渣粘度的增高而增大,所以相应在高粘度深熔池中,需要增加喷吹时间才能使熔池达到稳定、均匀的效果。

The numerical simulation was adopted to simulate the process of blowing gas into converter slag before slag splashing protection by a software.The influence of molten pool depth and slag viscosity on the flow of the molten pool was analyzed.The simulated results show that the deepening of the molten pool is conducive to the enhancement of turbulent kinetic energy conversion rate and the homogenization of the molten pool,and to the optimization of the flow field.The slag viscosity has a great influence on the dead zone ratio.The dead zone ratio is increased with the increase of the slag viscosity.Therefore,it is necessary to increase the injection time to make the molten pool stable and uniform in the deep melting pool with high viscosity.