Viscosities of calcium ferrite slags and calcium alumino-silicate slags containing spinel particles

The viscosity of a 19 wt% CaO–81 FeOx melt containing Fe3O4 particles up to a volume fraction of 0.1 was measured and compared with a previous study of the viscosity of 10 wt% Al2O3–28 CaO-10 MgO–42 SiO2 slag containing up to 0.2 volume fraction of MgAl2O4. The viscosity of both the alumino-silicate slag/spinel and the calcium ferrite/magnetite mixtures increased as the volume fractions of particles increased. The mixtures all showed apparent `Binghamʹ dependence. The results are discussed in terms of predicting two-phase liquid properties.