Study on Extraction of V₂O₅ from Vanadium Ore by Roasting and Acid Leaching Process

The recovering of V₂O₅ by roasting in air—sulfuric acid leaching—P204 extracting—precipitate separation V₂O₅ with ammonium salt from the vanadium ore was tested.The results show that about 90% of the vanadium can be leached after roasted 1.5 h in air at 800 ℃ while the rate of <1.19 mm roastedore is 84%.The acid leaching was taken out at normal temperature for 1h,and the mass ratio of liquid and solid was 1.2∶1,then a pure solution containing V₂O₅ was acquired.After been extracted with P204 and TBP dissolved in sulfonated kerosene and precipitated with ammonium water and pyrolytic decomposition,the refine V₂O₅(purity 98.74%) was acquired.The straight receive rate of V₂O₅ was over 85%.