Water Modeling of Effect on Steel Liquid Flow in the Bottom Gas Blowing Tundish of Different Porous Materials

Effect on steel liquid flow in the bottom gas blowing tundish of different porous materials was studied using water modeling.It is found that the parameters of porosity,permeability and average diameter have great influence on bubble si{e and gas flow rate which can form effective gas curtains.When gas is blowing through different porous materials,the relevant RTD curves are analysed and the gas blowing parameters optimized.The results show that higher gas flow rate is needed to form effective gas curtains and the bubbles are smaller as the porosity and permeability of porous materials are smaller. With bottom gas blowing at the tundish,the average residence time of steel liquid flow in the tundish can be prolonged effectively;the dead volume fraction can be reduced.Different gas blowing parameters are needed when gas is blowing through different porous materials at the same position of the tundish.