A novel method for enhancing vanadium extraction from calcified vanadium slag: H 2 SO 4 –Na 2 SO 3 synergistic reduction leaching and short process preparation of vanadium dioxide

The primary shortcomings of the current vanadium extraction from the calcification vanadium slag process are low vanadium leaching efficiency, potential ammonia pollution risk, and the inability to directly obtain low-valence vanadium products.