Abstract: Taking extracted vanadium residue from Panzhihua vanadium dregs as raw  material,using the system of sulfuric acid and helper leaching agent to conduct  the experimental research of the acid leaching to extract the vanadium. The  results  show that mixed sulfuric acid and helper leaching agnet C can destroy  the wrapping of vanadium, and promote the H+ reaction and leaching vanadium.  Under the conditions of helper leaching agent C dosage 4%, sulfuric acid  concentration 15%, liquid to solid ratio 1.5 mL/g, leaching temperature 90 ℃ and  leaching time 2h, the leaching rate of vanadium is 73% and 18 percent poits  higher than direct acid leaching technology. The leaching results are ideal.

Key words: Extracted vanadium residue, Acid leaching, Helper leacgubg agent