Rate of Desulfurization of Oxygen Containing Steel Bath and Falling Steel Droplets

Abstract

In order to clarify the influences of some factors on the desulfurization rates of molten steel by the slag, were performed experimental studies. The results obtained are summarized as follows:
(1) When steels containing various oxygen contents were desulfurized the rate constants decreased with the increase of initial oxygen. At the same time, oxygen decreased with time, but the rate constants were independent of the initial content. The influence of surface active oxygen on the desulfurization rate constants was explained by the decrease in the efficient reaction area due to the absorption of oxygen at the interface and by the increase in its area due to the decrease of oxygen with the reaction time.
(2) When the molten steel droplets fell down into the slag bath, desulfurization occurred very fast and the rate constants were 7-25 times larger than those of quiescent reaction.