Influence of a Rising Bubble on the Behavior of the Slag-Steel Interface

The interfacial contact area between molten steel and slag is one of the key factors influencing the efficiency of chemical reactions. This study reconstructs the phenomenon of gas bubbles traversing the slag-steel interface by constructing a physical modelPhysical model of the water–oil system and employing image processing techniques. The study focuses on the effects of bubble size, slag density, viscosityViscosity, and interfacial tension on the entrainment volume of steel and the slag-steel interface area. The entrainment volume increases with the increase of bubble size or slag density, but decreases with the increase of slag viscositySlag viscosity. The interface area shows a trend of first increasing and then decreasing with the increase of bubble size, and increases with the increase of slag density or the decrease of slag viscositySlag viscosity. As the oil-air interfacial tension increases, the water–air interfacial tension decreases, or the water–oil interfacial tension decreases, the liquid–liquid interface area increases.