Reduction Behavior of Ti in Low TiO₂ Content Slag During Blast Furnace Ironmaking Process

To determine the appropriate parameters for hearth lining protection by using TiO₂ containing materials,the influence of TiO₂ content in slag,temperature,reaction time,ratio of slag to hot metal,and w_(CaO)/w_(SiO2)slag binary basicity on reduction behavior of Ti in slag with low TiO₂ content,i.e.,1.0~5.0%,has been experimentally investigated through slag-hot metal reaction.The results show that the increase of TiO₂ content and binary basicity of slag,temperature,and reaction time contributes to Ti content increasing in hot metal.When the reaction time is fixed,TiO₂ content and temperature of slag have noticeable influence on Ti content in hot metal while binary basicity of slag has little influence.When the temperature is fixed,the relationship between Ti content and reaction time can be described by w_[Ti]=kt + c with k and c as constants.Ti content in hot metal increases rapidly with the increase of ratio of slag to hot metal(RSM) from 0.25 to 0.40,and it increases slowly in the RSM range of 0.40 to 0.50;further increase of RSM from 0.50 to 0.80 can result in a slow decrease of Ti content in hot metal.