溶鉄中の硫黄と酸素の活量
1982 年 68 巻 13 号 p. 1728-1736
詳細
1982 年 68 巻 13 号 p. 1728-1736
The equilibria of reactions between liquid iron and H2S-H2O-H2-Ar gas mixture were examined using a resistance furnace in order to make clear the interaction between sulphur and oxygen in liquid iron. The gas mixture was sufficiently preheated by adjusting its total flow rate, and hence thermal diffusion was avoided. Soundly solidified specimens were obtained when the gas mixture was diluted with argon. How-ever, adding too much of argon and water vapor decreased the values of PH2S/PH2 thermodynamically calculated. Therefore, experiments were performed on the basis of the condition, under which H2S-H2-Ar gas mixture was in thermal equilibrium.
As a fundamental study, measurements were carried out for liquid iron equilibrated with H2S-H2 and H2O-H2 gas mixtures using the same resistance furnace.
The interaction parameters eO(S) and eS(O) at 1 500, 1 550 and 1 600°C were obtained by combining the results for Fe-O-S system with those obtained in the present study for both Fe-O and Fe-S systems.
