Effect and mechanism of B2O3 on apparent viscosity of slag during smelting of vanadium-titanium magnetite in the Blast FurnaceYin-he Lin, Yong-cai Wen, Wei-guo Fu and Jia-ting RaoMetall. Res. Technol., 113 5 (2016) 506DOI: https://doi.org/10.1051/metal/2016038