Phosphorus Distribution between Liquid Iron and MgO Saturated Slags of the System CaO-MgO-FeO_x-SiO₂

Abstract

Experiments have been made to study the phosphorus distribution between liquid iron and the CaO-SiO₂-FeO_x slag equilibrated in a magnesia crucible in the temperature range 1550° to 1650°C. The phosphorus distribution ratio (P₂O₅)/[P] increased with increasing CaO content and decreasing temperature. The maximum value of the distribution ratio was found to be present near the slag composition saturated with the tricalcium silicate and the magnesio wustite phases. The experimentally determined phosphorus content in metal disagrees with the phosphorus contents estimated from the treatments proposed by Balajiva et al., Turkdogan and Pearson, and Healy over the present range of slag compositions, except by Flood and Grjotheim.