Absorption of Sulfur by Liquid Slags from the Gas Phase in the Presence of Liquid Iron under the Reducing Atmosphere

Rates of sulfur transfer from the gas phase to liquid slaps in the presence of liquid iron under the reducing atmosphere were studied. In the present work, an Ar-H2S gas mixture was introduced over slaps as CaO-SiO2 and CaO-SiO2 Al2O3 slaps at 1550°C. Results obtained are summarized as follows: (1) Although the sulfur transfer from the Ar-H2S gas mixture to liquid slaps is practically independent of the presence of liquid iron, the rate of sulfur absorption of acidic slaps increases gradually as the reduction of silica in those slaps proceeds. (2) When the slaps are acidic, it is observed that sulfur transfers into liquid iron through those slaps and then returns to slaps after the maximum concentrations are attained. (3) The rate of silicon transfer from Slags to liquid iron increases with increasing sulfur absorption of slaps from gas phase, because the reaction of sulfur absorption of slaps accompanies the consumption of oxygen ions in those slaps.