A novel approach for pre-concentrating vanadium from stone coal ore

The practicability of this design was confirmed using industrial stone coal on a laboratory scale. When 10 mass% Fe2O3 relative to stone coal was added and roasted at 1200 °C for 3 h, a high-grade concentrate containing vanadium higher than 14 mass% was obtained, and more than 91% of the total vanadium in stone coal was recovered.