The equilibria between liquid iron and liquid slags such as (Mn, Fe) oxide, (Mn, Fe) sulphide and (Mn, Fe) oxysulphide were examined with MgO crucible at 1550 and 1600°C.
The effect of sulphur on the equilibrium relation of deoxidation of liquid iron with manganese, the activity of each component in the slag of (Mn, Fe) oxysulphide and the sulphur distribution between slag and metal were investigated.