Separation of Vanadium from Iron in Vanadium-Rich Molten Iron

A large number of studies of vanadium extraction based on sodium roasting experiments have been carried out in the laboratory through the self-designed converter vanadium extraction device. The content of the main elements was analyzed by X-ray fluorescence spectrometer. The optimal conditions of roasting process of vanadium slag were obtained as follows: addition of 19% Na2CO3, roasting temperature of 800 °C, roasting time of 120 min, and the particle size of vanadium slag was less than 125um. While the leaching process was conducted by water and the optimal conditions were obtained as follows: the leaching temperature of 90 °C, leaching time of 30 min, and the liquid–solid ratio of 8.0 mL/g. Under those optimal conditions, the leaching efficiency of vanadium was greater than 89.4%. And the enlarged experiments confirmed the stability of those parameters.