Abstract: The vanadium in the stone coal vanadium ore，occurs in mica and clay minerals in the form of aluminum vanadium oxide and vanadium oxide hydrate and outputs at low valence.After crushing and grinding to below 0.15 mm，vanadium in the stone coal vanadium ore could be extracted directly by sulfuric acid，under the cooperation of additive（inorganic mixer，containing oxidant，and complexing agent），heating and stirring.The recovery of vanadium could reach more than 76%.Through adjusting pH，oxidation，separation and enrichment，and refining etc.，the quality of the products was better than that of stipulated in Metallurgical Grade 98 Standard，Vanadium Pentoxide，YB/T 5304—2011.

Key words: stone coal vanadium ore, sulfuric acid leaching, vanadium pentoxide, experimental study