Experimental Study and Modelling of Viscosity of Chromium Containing Slags

Viscosities of slags containing Al 2 O 3 , CaO, CrO x , MgO and SiO 2 were measured in contact with metallic chromium using the rotating cylinder method. The modified Urbain model, developed at the University of Queensland, was extended to include MgO, CrO and Cr 2 O 3 , in addition to existing Al 2 O 3 , CaO, FeO and SiO 2 . Chromium oxides, in general, decrease the slag viscosity, although addition of trivalent oxide raises up the liquidus temperature and thus limits the measuring range. The model was able to describe the viscosity of complex slags reasonably well in most experimental cases.