Abstract: High-quality vanadium pentoxide was prepared by the following process:black shales (stone coal) vanadium ore crushing,compound additives mixing,oxidating and roasting in a rotary kiln,water quench leaching and wet milling grading,dynamic leaching and exchange under double stirring,saturated resin cleaning and desorption,desorption solution purifing and vanadium precipitation,and crude vanadium dehydration and deamination.Through comprehensive testing and industrial practice to the influencing factors of each procedure on leaching rate of vanadium,a new technology of extracting vanadium pentoxide from black shale (stone coal) vanadium ore was summed up.Technology realized more than 80% vanadium leaching rate from roasting stone coal vanadium ore,the comprehensive recovery of vanadium was over 70%,and product quality was better than YB/T 5304—2006 Vanadium Pentoxide Standard.

Key words: black shales (stone coal), vanadium pentoxide, technical research, industrial practice