Permeability and Apparent Diffusivity of Oxygen in Molten Iron Oxide-CaO-SiO₂ System

Abstract

Permeabilities of oxygen through molten iron oxide-CaO-Si0₂ have been measured by means of the penetration method through molten film developed by the authors.
The permeability of oxygen increased with increasing iron oxide content when the content was low. However it decreased with increasing iron oxide content above 30wt%.
This phenomenon was explained on the basis of the theory for high temperature oxidation of metals by C. Wagner. From the present results, it was found that the apparent oxygen diffusivity can be determined. This can be used for the calculation of oxygen transport rate through the molten slag under non-steady state.