A PRODUCTION METHOD OF VANADIUM OXIDE USING EXTRACTION

摘要

Disclosed is a production method of vanadium oxide using extraction, comprising the following steps: a.) Mixing vanadium-containing material with additive to give mixed material; b.) Roasting the mixed material to give roasted material; c.) Adding water into the roasted material to give slurry; d.) Removing residue after leaching to give leachate, subjecting the leachate to Phosphorous(P)-removal treatment and Calcium(Ca)-removal treatment, washing the residue with circulation water to give washing water useful for preparing slurry in next leaching; e.) Subjecting the P-removed and Ca-removed leachate to extraction by using an extraction agent which has been saponified by ammonia, and then separating the aqueous phase and organic phase; f.) Regulating pH of the aqueous phase with sulphuric acid, heating, filtering, and washing and drying the precipitate to give ammonium polyvanadate, subjecting the ammonium polyvanadate to calcination to remove ammonia to give V2O5, or reducing the ammonium polyvanadate to give V2O; and g.) Removing P, Manganese (Mn), and Magnesium (Mg) impurities in the wastewater generated in step f, and returning the circulation water to step c for preparing slurry and to step d for washing residue.