应用反浮选原理去除废钒催化剂中的大部分硅后，先在弱酸性介质中溶解出低价钒，然后对未溶物料进行高温焙烧，再在弱碱性介质中进行第二次溶解，使高价钒亦转入溶液中。浸出液轻氧化、中和处理，并用离子交换法净化料液，一次沉钒即可获得纯度达９９．５％的Ｖ２Ｏ５产品。钒回收率在９０％以上。 Application of anti-flotation principle to remove most of the waste vanadium catalyst, after the first low-vanadium dissolved in a weak acid medium, and then the undissolved material calcined at high temperatures, and then weakly alkaline medium for a second dissolution, High-priced vanadium is also transferred to solution. The leachate is lightly oxidized and neutralized, and the feed liquid is purified by ion exchange. Once vanadium is precipitated, a V2O5 product with a purity of 99.5% can be obtained. Vanadium recovery rate of 90% or more.