VISCOSITIES OF LF SLAGS AND THEIR IMPACT ON LADLE REFINING

This study focuses on the viscosities of synthetic slags used in secon dary refining operations. Typically, these slags contain mainly CaO, A l2O3, MgO and SiO2. The data for LF slag viscosities are used in a mod el for a gas-stirred ladle to evaluate the effect of viscosity variati ons on predicted parameters close to the slag/steel interface. The res ults show that viscosities of LF slags significantly affect ladle refi ning operations. It is therefore necessary to control the composition of the synthetic slags carefully during production.