Researchers at Steel Authority of India Ltd (SAIL) have been using thermodynamic databases and FactSage 6.4 software to optimise the parameters of slag basicity and slag oxygen potential in order to optimise the desulphurisation of liquid steel in the ladle. By Snehangshu Roy, Rajeev Kumar Singh, A. Paul, A. Gupta, N. Banerjee, N. Pradhan and S. Ghosh