The invention discloses a method for wet-process
vanadium extraction by using
vanadium- and
titanium-containing converter
slag, which comprises: performing acid leaching directly by using 5 to 30
mass percent
sulfuric acid; adding NaClO into the
leachate to perform oxidization treatment, performing
ion exchange purification and separation by using alkalescent anion exchange resin which is transformed by
sulfuric acid, and desorbing by using NaOH; adding
ammonium chloride into stripping liquid to precipitate
vanadium, filtering and calcining
ammonium metavanadate
filter cake to obtain powdered vanadium
pentoxide; and
processing titanium-enriched leaching residue to obtain
titanium dioxide. In the invention, the direct leaching of converter vanadium-
titanium slag is realized, process flow in shortened, the
pollution caused by adding oxidant is avoided, and due to the use of the low-concentration
sulfuric acid, the
material consumption and the requirements on the
corrosion resistance of equipment are reduced at the same time. The method realizes the comprehensive
recovery and utilization of all valuable elements, belongs to a novel all wet-process
smelting technique, and avoids waste
discharge in a whole process.