Abstract: The components of practical blast furnace (BF) slag of vanadium-titanium magnetite were adjusted by adding pure chemical reagents. The effects of binary basicity， MgO， Al₂O₃， TiO₂ and V₂O₅ on the metallurgical properties of experimental slag were studied under neutral atmosphere. The results showed that with increasing content of basicity and MgO， the melting temperature (t_○m)， initial viscosity (η_○0) and high-temperature viscosity (η_○h) of slag first decrease and then increase. As increasing Al₂O₃ content， t_○m increases， η_○0 first decreases and then increases， η_○h increases. When increasing TiO₂ content， t_○m increases， η_○0 and η_○h decrease. The viscosity flow activation energy of slag increases and the heat stability of slag becomes worse. With increasing V₂O₅ content， t_○m first decreases and then increases， η_○0 and η_○h increase. The suitable BF slag for smelting vanadium-titanium magnetite is: binary basicity 1.15，MgO 13%， Al₂O₃ 13%， TiO₂ 7%，V₂O₅ 0.30%.

Key words: vanadium-titanium magnetite, blast furnace slag, slag component, metallurgical properties, neutral atmosphere