Influence of Cr2O3 content on viscosity and rheological behavior of Cr2O3-containing slags

The rheological behavior of Cr2O3-containing slags was investigated using a rotating cylinder viscometer and the solid fraction and phases of Cr2O3 in molten slags were also calculated and observed at different temperatures. Furthermore, the viscosities of CaO-SiO2-Cr2O3(-10%Al2O3) slags were measured from 1703 to 1953 K and the influence of Cr2O3 content on the viscosity and rheological behavior of molten slags was investigated. The calculation revealed that the solid fraction of the molten slags varied with the Cr2O3 content and maximum temperature, and the fluid properties transitioned from Newtonian to non-Newtonian behavior when the solid fraction reached 5%. Moreover, the increase in Cr2O3 content led to an increase in the viscosity as the slags displayed Newtonian flow characteristics and a decrease in the viscosity when slags exhibited non-Newtonian flow characteristics. The viscosity results of Cr2O3-containing slag from 1703 to 1953 K and from 1703 to 1813 K were also discussed with the morphologies.