Evaluation of Sulfur Addition to the High Basicity Slag on the Sulfur, Aluminum, and Cleanliness of High Sulfur Al‐Killed Molten Steel

Abstract

In the present work, the influence of sulfur addition to the high basicity slag on the Al‐killed molten steel with high sulfur content was investigated by using a vacuum induction furnace at 1873 K in MgO crucibles. CaO–SiO2–Al2O3–MgO–CaS slags were used to study the effect of high basicity slags with different CaS contents on sulfur loss, aluminum loss, and total oxygen content in the molten steel. It is shown that the sulfur content in the molten steel decreased with the time, and the addition of CaS into the slag can reduce the sulfur loss in the molten steel. Moreover, there was a decreasing tendency of the aluminum content in the molten steel with the time, and the addition of CaS into the slag can reduce the aluminum loss in the molten steel. Total oxygen content in the molten steel first increased and then decreased with the time when no CaS was added into the slag. However, it decreased monotonically with the time when the addition of CaS was made into the slag.

Effect of CaO/Al₂O₃ Ratio of Ladle Slag on Formation Behavior of Inclusions in Mn and V Alloyed Steel

“…[16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] Holappa et al 21) reported a thermodynamic evaluation of inclusion formation and modification in calcium treated steel transferring from ladle to tundish and mold until the steel solidified. Recently, Verma et al [24][25][26] reported a mechanism of using calcium to modify alumina and spinel inclusions.…”