Experimental studies of the viscosities in the CaO‐FeO‐SiO₂‐CaF₂ slags

Abstract

In this investigation, the viscosity of slags containing 4 components, viz. CaO (4.48 wt% to 35.1wt%), FeO (16wt% to 50.9wt%), SiO 2 (27.33 wt% to 47 wt%) and CaF 2 (3.53 wt% to 13.2 wt%) were carried out with temperature range 1435 to 1749 K. For measuring the viscosity, a rotating cylinder method with iron spindle and crucible were used. The pre‐ as well as post‐measurement samples of the slags were subjected to chemical and X‐ray fluorescence analyses. The results indicated no significant change in composition during the measurements. In the temperature range of study, CaF 2 additions had the expected effect of decreasing the viscosity of the slags. The effect was found to be particularly significant at lower temperatures. The slag viscosities were found to increase with increasing SiO 2 contents and decreasing basicities. Arrhenius and Weymann activation energies for viscous flow have been evaluated from the present results.