Distribution of Nb, P, Mn between Liquid Iron and MgO-saturated Fe_tO-SiO₂-NbO_x-MnO Slags

Abstract

Experiments have been conducted to study the niobium, phosphorus, and manganese distribution between MgO-saturated Fe_tO-MnO-SiO₂-NbO_xslags and liquid iron at 1 600°C. It is shown that the niobium dis tribution ratio increases with the iron oxide content in slag, whereas the phosphorus and manganese distribution ratios remain almost constant. Also, the thermodynamic criteria governing the selective oxidation of niobium, phosphorus and manganese in the extractive process of niobium from hot metal are discussed.