Effect of chromium–sulphur interactions on decarburisation of levitated Fe–C alloy droplets by CO2–Ar gas mixtures

This study provides a comprehensive evaluation of the influence of chromium on the decarburization kinetics for systems involving CO2 as the oxidant in the presence of the surface active element sulphur. The increase in decarburization rate of iron-chromium droplets, compared to chromium-free droplets containing the same amount of sulphur, can be accounted for by the solute interaction effects between chromium and sulphur in the liquid phase that resulted in a decrease of surface site occupation by sulphur