1991 Volume 77 Issue 3 Pages 353-360
Phase equilibria of Fe-S-C ternary melts have been studied to obtain the fundamental knowledges on the copper removal from liquid iron by FeS flux.
Measurements were made to clarify the solubility of carbon and miscibility gap between iron and FeS melts at carbon saturation or unsaturation in Fe-S-C melts at temperature range from 1 473 to 1 873 K. Some thermodynamic considerations were tried by applying interstitial model. In order to determine the interaction parameter in Fe-C binary system, activity of iron in liquid Fe-C binary alloys was measured by the distribution of iron between liquid iron and silver.
It was concluded that interstitial model was applicable to express thermodynamic relations in this system. By this model, phase diagram and iso-activity contour of constituents in Fe-S-C ternary melts were calculated.
