Influence of CaF2 on the apparent viscosity of CaO-SiO2-MgO-Al2O3-TiO2 slagsYin-he Lin, Li-qiang Zhang and Xiao-li HuangMetall. Res. Technol., 114 6 (2017) 606DOI: https://doi.org/10.1051/metal/2017067