1979 Volume 65 Issue 12 Pages 1727-1736
The permeabilities of oxygen through the molten Fe2O3-CaO-SiO2-Al2O3and CaF2-CaO-SiO2-Al2O3systems were measured by means of an experimental procedure which was developed by the authors. Those trough the Fe2O3-CaO-SiO2-Al203and CaF2-CaO-SiO2-Al2O3melts were found to be in the range of 1×10-8to 1×10-6and 5×10-12to 5×10-8moles O2/cm·s, respectively. The permeability was raised by a factor of 10 to the 10th power when 0.2 wt% of Fe2O3was added to 40 wt%CaO-40 wt%SiO2-20 wt% Al2O3melt. The permeabilities through the molten slags with Fe2O3are proportional to the 1/4th power of oxygen partial pressure in the atmosphere. The permeabilities through the molten slags without Fe2O3are directly proportional to the oxygen partial pressure in the atmosphere. They increase when CaF2is added to the Fe2O3-CaO-SiO2-Al2O3melt.