Viscosities of the quaternary Al2O3-CaO-MgO-SiO 2 slags

Abstract

Viscosities of some quaternary slags in the Al2O 3-CaO-MgO-SiO2 system were measured using the rotating cylinder method. Eight different slag compositions were selected. These slag compositions ranging in the high basicity region were directly related to the secondary steel making operations. The measurements were carried out in the temperature range of 1720 to 1910 K. Viscosities in this system and its sub-systems were expressed as a function of temperature and composition based on the viscosity model developed earlier at KTH. The iso-viscosity contours in the Al2O3-CaO-MgO-SiO2 system relevant to ladle slags were calculated at 1823 K and 1873 K for 5 mass% MgO and 10 mass% MgO sections. The predicted results showed good agreement with experimental values and the literature data. © 2011 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.