对钒渣空白焙烧-碱浸提钒，研究了钒渣中钒的转化和溶出规律. 结果表明，焙烧过程中渣中钒铁尖晶石FeV2O4中的钒逐步氧化成VO2和V2O5，并优先与Ca, Mn和Mg等形成钒酸盐；浸出分为低温浸出和高温浸出，低于180℃只能浸出钒酸盐和钒氧化物，高于180℃可浸出固溶在硅酸钙中的钒，钒浸出率达97.63%.

The conversion and dissolution mechanism of vanadium in the process of blank roasting and alkali leaching were studied. The results showed that vanadium in spinel (FeV2O4) was gradually oxidized into VO2 and V2O5, and then formed vanadate by combining with Ca/Mn/Mg. Leaching process ccan be divided into low temperature leaching (T<180℃) and high temperature leaching. Low temperature leaching only extracted vanadate and vanadium oxide, while high temperature leaching (T≥180℃) extracted the vanadium in the form of solid solution in calcium silicate. Vanadium leaching rate in blank roasting and alkali leaching process reached 97.63%, while the rate of traditional process was only 80%. The application of blank roasting and alkali leaching process could realize the high efficiency and clean extraction of vanadium from vanadium-bearing slag.