<p>Slag basicity is a critical factor that determines the operational stability and efficiency of separation between metal and slag in metallurgical processes. In this study, the effect of basicity on the melting separation process of reduced Hongge vanadium titanomagnetite pellets was systematically investigated. The results show that the increase of basicity promote the separation of slag and metal, and increase the recovery rates of iron, vanadium, and titanium in the metallic phase. However, excessive basicity led to a decrease in the recovery rate of TiO₂ in the molten titanium slag. With the increase of basicity, the melting temperature of the molten titanium slag demonstrated an initial decrease followed by an increase, and the slag viscosity decreased. Furthermore, the diffraction peak intensity of anosovite weakened, while the diffraction peak intensity of pyroxene was enhanced and the diffraction peak of perovskite appeared. Except for the presence of metallic iron particles in the molten titanium slag with a basicity of 0.4, only the matrix phase and Ti-rich phases were observed under other basicity conditions.</p>