Influence of Slag and Refractory Materials on Inclusions during the Ladle Refining of Low Carbon Aluminum Killed Steel

The evolution of inclusions in low carbon Al killed steel during ladle refining was studied based on industrial experiments, which high basicity slag used. results showed that experienced the changes from Al2O3 → MgO-Al2O3 CaO-MgO-Al2O3 CaO-Al2O3. Without calcium treatment, inclusion were largely transformed into or With aim to decrease and clarify effects refractory materials inclusions, laboratory experiments performed with lower (lower theoretically helps reduce spinel-type inclusions) MgO crucibles. indicated that, dissolved liquid would react CaO at 1600 °C. Hence, [Mg] [Ca] be supplied bulk steel. Due large contact area between MgO-based steel, as well higher activity refractory, Mg can more easily reduced, accounts for easy modification MgO-Al2O3. By contrast, because limited supply CaO-Al2O3 incomplete. use Al2O3-based reefing about 2.45, obviously decreased.