METHOD OF MANUFACTURING HIGH PURITY VANADIUM COMPOUND FROM CARBONACEOUS RESIDUE CONTAINING VANADIUM

摘要

PROBLEM TO BE SOLVED: To provide a method of efficiently manufacturing a high purity vanadium compound from a residue containing carbon discharged from refineries or power plants. SOLUTION: The method of manufacturing high purity vanadium is composed of the following dry treatment and wet treatment. That is, the method of manufacturing a high purity vanadium compound is composed of (a) a combustion process for combusting a raw material residue at 500-690 deg.C, (b) a heat treatment process for heat treating the combusted residue from the combustion process at 500-1,300 deg.C under a fixed oxygen partial pressure to convert to 4-valent vanadium oxide, (c) an exudation process for exuding out 4-valent vanadium ion selectively by adding water and sulfuric acid to the resultant solid substance, (d) a separation process for separating the mixed liquid into a vanadium dissolved liquid and a remaining solid substance, (e) a precipitation process for adding an alkaline material to the vanadium dissolved liquid to precipitate as a 4-valent vanadium compound and (f) a separation process for separating the deposited precipitate.