Numerical Simulation of Steel Flow Characteristics in Tundish with Argon Bottom Blowing

According to the structure and the tundish operating parameters of a production plant,the flow charecteristics of steel in the tundish with turbulence inhibitor and gas curtain technique was researched by numerical simulation method.Eulerian-multiphase model and porous media model were applied in the research.The effect of gas curtain position and gas flow rate on the flow characteristics of steel in the tundish was investigated.The results indicate that the position of gas blowing and gas flow rate has remarkable effect on the steel fluid flow and RTD curve.It is disadvantageous to the steel fluid flow if the position of gas blowing is near the inlet or outlet.There is an optimum range for the gas flow rate,too large is liable induce slag rolling but too small is disadvantage to forming gas curtain.When the distance of gas blowing position from the inlet is 1 200~2 000 mm meanwhtile the gas flow rate is 0.90 m³/h,the residence time of fluid in tundish will be effectively prolonged and the dead zone volume will be decreased,and so accelerate the removal of inclusions.