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

The rheological behavior of Cr 2 O 3 -containing slags was investigated using a rotating cylinder viscometer and the solid fraction and phases of Cr 2 O 3 in molten slags were also calculated and observed at different temperatures. Furthermore, the viscosities of CaO–SiO 2 –Cr 2 O 3 (–10%Al 2 O 3 ) slags were measured from 1703 to 1953 K and the influence of Cr 2 O 3 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 Cr 2 O 3 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 Cr 2 O 3 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 Cr 2 O 3 -containing slag from 1703 to 1953 K and from 1703 to 1813 K were also discussed with the morphologies.