Effects of basicity and CaF2 on the viscosity of CaF2–CaO–SiO2 slag for electroslag remelting processYigui Lao, Yunming Gao, Fangjie Deng, Qiang Wang and Guangqiang LiMetall. Res. Technol., 116 6 (2019) 638DOI: https://doi.org/10.1051/metal/2019066