1979 Volume 65 Issue 12 Pages 1712-1719
The process of oxygen absorption of liquid iron has been studied by taking the formation of iron oxide at the gas-metal interface into account. The rates of oxygen absorption have been measured by blowing Ar-O2 gas mixtures onto inductively stirred liquid iron.
It was confirmed that oxygen absorption from gas phase is represented by a model that most of gaseous oxygen dissolves into liquid iron through oxide free interface, although some of them forms iron oxide at the interface and then dissolves into liquid iron. The results show that this model is valid for the process of oxygen absorption in the range above 0.057 atm pO2· When the partial pressure of oxygen is lower than 0.057atm pO2, however, the formation of oxide could be practically ignored, so that the rate of oxygen absorption is controlled simply by the mass transfer in gas phase.