Transient behavior of dephosphorization kinetics in oxygen steelmaking

The kinetics of dephosphorization in steelmaking is a complex phenomenon, as it occurs under non-equilibrium conditions with transient rate parameters. It is clear that simple first order rate equations could not explain the behavior of phosphorus refining in steelmaking operations. In the present paper recent work on the kinetic modeling of dephosphorization in BOF process is reviewed. In particular, plant trial data has been analyzed and different equations for analyzing these data have been investigated. The nature of transient variables e.g. slag-metal interfacial area, rate constants, equilibrium driving force on kinetics of phosphorus refining has been investigated. Further a kinetic modeling approach of phosphorus incorporating the recent theory of bloated droplets is described. AISTech 2015 Proceedings