Simulation of metal-oxide melt interaction in view of kinetics of chemical reactions in the interphase boundary

Abstract

Thermodynamics analysis of oxidation-reduction reactions between metal melt and slag (1) provides answers to certain practical issues such as the path of specific chemical reactions, final (equilibrium) phase composition, and the elements that are reduced and oxidized at given physical parameters. Although considerable, this is obviously not enough to analyze real technological systems, because the required equilibrium cannot be normally achieved despite high temperatures of welding and metallurgical processes. Hence, a dynamic problem has to be resolved here, which is calculating phase composition as a function of time. This cannot be achieved without knowing the rates of element concentration changes in each and every phase, and also technological parameters of the process. Relevant studies are detailed in(2-19). This paper analyzes special kinetic features of physical and chemical processes in the metal and oxide melt interface.