Abstract
The rates of nitrogen absorption in the ternary liquid iron, Fe-O-J, at several oxygen levels were measured at 1600°C. The results show that chromium and vanadium clearly increase the apparent mass transfer coefficient in any oxygen levels, as chromium and vanadium increase up to about 2%. Manganese and nickel have virtually no effect on the apparent mass transfer coefficient. The deoxidizing elements, such as chromium and vanadium, act as counter-poison for surface active oxygen. However, it is reasonable to consider that oxygen at the gas-metal interface mostly remains near interface, andacts as a resistant substance, even if the deoxidizing elements are present.
It is further observed that carbon, manganese and silicon in the ternary liquid iron, Fe-S-J, have virtually no effect on the apparent mass transfer coefficient, probably because of the lower affinities of these elements to sulphur and the weaker effect of sulphur on the rate of nitrogen absorption than oxygen.
