Effect of Phosphorus on the Activity of Oxygen in Liquid Iron

Study on dephosphorization of molten steel-I

Abstract

The interaction between oxygen and phosphorus in molten iron was studied by a method of equilibrating molten Fe-P alloys with a mixture of hydrogen and water-vapor at a given ratio.
The composition of the gas mixture was so determined that slag was not formed. In order to examine the effect of temperature on the interaction parameter e ^(p) _o, experiments were performed at three different temperatures of 1540°C, 1585°C. and 1625°C, but there was almost no difference within the experimental errors.
The interaction parameter e ^(p) _o (=∂logf ^(p) _o/∂ [%P]) calculated from the present results was approximately +0.06 at an average temperature of 1585°C.