Investigation the influences of B2O3 and R2O on the structure and crystallization behaviors of CaO–Al2O3 based F-free mold fluxJiangling Li, Bowen Kong, Xiangyu Gao, Qingcai Liu, Qifeng Shu and Kuochih ChouMetall. Res. Technol., 115 3 (2018) 304DOI: https://doi.org/10.1051/metal/2017096