Effect of Sulfur in Slag on Dynamic Chan (1)

In the continuous casting process of steel, minimizing slag entrapment into liquid steel is crucial, which necessitates an understanding of the dynamic change behavior of interfacial tension between liquid steel and molten slag during redox chemical reactions at their interface. This study aims to investigate how the presence of sulfur in slag affects this interfacial tension behavior. Employing a series of experiments, the interfacial tension of liquid iron/molten slag was evaluated under varying sulfur content conditions while closely monitoring the redox chemical reactions. The results indicate that the interfacial tension decreases as sulfur content in the slag increases, leading to a more pronounced effect on slag entrapment during continuous casting. Furthermore, the observed dynamic changes in interfacial tension could be attributed to the excess adsorption of oxygen atoms resulting from the decomposition reactions of slag components, with subsequent desorption processes. This understanding can significantly improve the control strategies employed in steel manufacturing, thereby enhancing the quality of produced steel while minimizing defects related to slag entrapment.