Kinetic Study on Nitrogen Absorption and Desorption of Molten Iron

Measurements have been done on the rates of nitrogen absorption and desorption of levitated iron droplets. On the assumption that the mass transfer between two phases determines the total reaction rate, the kinetics of this reaction has been studied. The results obtained in the present work are as follows: The rate equation with the same parameter a conformed to both the rates of nitrogen absorption and of desorption. A decrease in influence of oxygen in the melt on the rate constant of the melt phase with increasing temperature was interpreted to be due to the increase infraction of bare surface. In connection with Arrhenius equation, it was suggested that the rate of surface chemical reaction is not possible to be the rate determining factor.