Viscosity Measurements of SiO2-FeO-MgO System in Equilibrium with Metallic Fe

The present study delivers the measurements of viscosities in the SiO2-FeO-MgO system in equilibrium with metallic Fe. The rotational spindle technique was used for the measurements at the temperature range of 1523 K to 1773 K (1250 A degrees C to 1500 A degrees C). Molybdenum crucibles and spindles were employed in all measurements. The viscosity measurements were carried out at 31 to 47 mol pct SiO2 and up to 18.8 mol pct MgO. Analysis of the quenched sample by Electron probe X-ray microanalysis after the viscosity measurement enables the composition and microstructure of the slag to be directly linked with the viscosity. The replacement of FeO by MgO was found to increase viscosity and activation energy of the SiO2-FeO-MgO slags. The modified Quasi-chemical Viscosity Model was further optimized in this system based on the current viscosity measurements.