還元性雰囲気下における溶鉄と共存する溶融スラグの気相からの硫黄吸収

抄録

The rates of sulfur transfer from gas phase to the liquid slags in the presence of liquid iron under reducing atmosphere were studied. In the present work, Ar-H2S gas mixture was introduced over slags as CaO-SiO₂ and CaO-SiO₂-Al₂O₃-slags at 1 550°C.
The results obtained are summarized as follows:
1) Although the sulfur transfer from Ar-H₂S gas mixture to liquid slags is independent of the presence of liquid iron, the rate of sulfur absorption of acidic slags increases gradually as the reduction of silica in those slags proceeds.
2) When the slags are acidic, it is observed that sulfur transfers into liquid iron through those slags and then returns to slags after the maximum concentrations are attained.
3) Rate of silicon transfer from slags to liquid iron increases with increasing sulfur absorption of slags from gas phase, because the reaction of sulfur absorption of slag accompanies the consumption of oxygen ions in those slags.