| Mass transfer between two immiscible liquids, oil and water, simulating slag and steel respectively, was measured in a scale model of ladle. The transferred species was thymol, which has an equilibrium partition ratio between oil and water similar to that of sulfur transfer between slag and metal. The mass transfer rate was measured as a function of commonly encountered design parameters used in ladle steelmaking. Mixing times in the presence of an oil layer were also measured and interpret ed from the standpoint of two phase mass transfer. The dependence of mass transfer on gas flow rate allows one to define three distinct regimes of gas flow rate, each exhibiting a different dependence. The critical gas flow rate at the boundary between the first and the second flow rate regimes, was found to be a function of the position of gas injector, the slag/metal volume ratio, the densities of two phases, and the interfacial tension. The data allowed these critical gas flow rates to be correlated against system parameters. |
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