This book focuses on influence of slag-steel chemical reaction on control of inclusions in Al deoxidized special steel. Readers learn about the control of inclusions in Al deoxidized special steel refined with high basicity high alumina slag. This refining slag system was developed by the authors and used to target low melting point inclusions. This book is useful for university teachers, graduate students, researchers and engineers who are engaged in the field on control of non-metallic inclusions in steel, particularly those who are exploring innovative and optimal technologies for more efficient control of inclusions and improved qualities of steels.