Abstract
The paper presents the study of the influence of the most important slag oxides on the distribution of manganese between slag and metal ?Mn in the electric arc furnace (EAF) steelmaking. The higher yield of manganese would help to save the energy costs and  the consumption of relatively expensive ferromanganese alloy. The plant data from 48 EAF campaigns were statistically evaluated. The graphical results in accordance with the majority of references confirmed the positive effect of basicity, %CaO, %Al2O3 growth and %FeO decline on the manganese yield (decrease of ?Mn). Better conditions for higher Mn yield also help dephosphorization efficiency.