复吹转炉熔池内流体流动的数值模拟

Numerical Simulation of Fluid Flow in Converter Combined Blown Bath

建立了描述复吹转炉熔池内流体流动的数学模型，采用PHOENICS（Parabolic Hyperbolic or Elliptic Numerical Integration Codes Series）商用软件模拟计算．根据模拟计算结果分析了底吹、顶吹、顶底复吹等不同工况下熔池内不同截面流体的流动状况和速度分布，得出各喷枪正常工作情况下，熔池内的流动是以转炉中心轴对称的三维流动，底吹、顶吹搅拌流动的动力主区和流动迟缓的旋涡区，提出在实际生产中应设法减少或消除的流动“死区”，转炉采取顶底复吹工艺时，底吹喷枪的合理布置位置应在熔池直径的（0．5～0．7）倍圆周上．

The fluid flow mathematic models in converter combined blown are set up. It is simulated for flow state and velocity distribution of gas and stir action in different behaviours of bottom blown, top blown and combined blown by software PHOENICS（ Parabolic Hyperbolic or Elliptic Numerical Integration Codes Series）. In normal operation condition of ejection guns, the fluid flow in bath is axisymmetric three-dimensions flow. The results reveal out dynamic main area and slowness cyclone zones, also asked dead zone abating or erasing in practice. These shows that bottom blown gun ought to 0.5～0.7 circumference diameter of fused bath using top-bottom combined blown process.