METHOD OF RECOVERING VANADIUM OXIDE FLAKE FROM DIESEL OIL FLY-ASH OR ORIMULSION FLY-ASH

摘要

Abstract Disclosed is a method of recovering a vanadium oxide flake from diesel oil fly-ash or Orimulsion fly-ash, including the steps of leaching a mixture of diesel oil fly-ash or Orimulsion fly-ash and water in an agitation leaching bath to dissolve vanadium and nickel, subjecting the leached mixture to solid-liquid separation to obtain a leached solution, adding a neutralizing agent to the leached solution to adjust pH to 5-6 to recover vanadium tetraoxide from the leached solution, drying the recovered vanadium tetraoxide at high temperatures to remove water contained in vanadium tetraoxide, and adding a flux to the dried vanadium tetraoxide and melting vanadium tetraoxide in a melting furnace, to prepare a vanadium oxide flake.