Activity of Chromium Oxide in Calcium Silicate Bearing Molten Slag for Highly Clean Chromium Steel Refining Process

Thermodynamic properties of chromium oxide in molten slags are essential to optimizing stainless steel refining processes and reduction ores. The present study conducts chemical equilibrium experiments at 1823 K (1550°C) under different oxygen partial pressures order investigate activity coefficient CaO–CaF2–MgO–Al2O3–SiO2–MnO–CrOx with low content taking the effect MgO addition into consideration. An increase initial from 0 20 mass% increases CrOx 6.38×10−12 atm 1.60×10−10 atm. It is found that lower pressure may reduce solid phase formation. recommends usage 29 CaO-5 CaF2-20 MgO-10 Al2O3-29 SiO2-5 MnO-2 Cr2O3 slag loss atm, where highest without phase.