  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.
