Influence of CaF2 on the apparent viscosity of CaO-SiO2-MgO-Al2O3-TiO2 slags Yin-he Lin, Li-qiang Zhang and Xiao-li Huang Metall. Res. Technol., 114 6 (2017) 606 Published online: 19 September 2017 DOI: 10.1051/metal/2017067