Titanium Deoxidation Reaction of High Sulfur Molten Steel

Titanium deoxidation experiments of sulfur bearing molten steel were carried out with CaO–SiO2–TiO2–S slag at 1873K and the kinetic analysis on basis of the coupled reaction model was applied. Thermochemical software was introduced into the model to achieve the activity coefficient in wide range slag compositions. Sulfur contents in both metal and slag were calculated from the sulfide capacity based on the optical basicity model. The behavior of major components such as titanium, sulfur and so on in both metal and slag were clarified experimentally and analytically. The present modeling study suggested that the reduction rate of titanium in metal was not strongly affected by the initial CaO/SiO2 ratio or TiO2 composition of flux. The model was extended to handle both TiO2 and Ti2O3 simultaneously and the calculated results showed good agreements with the experimental results.