基于固体氧化剂的铁水间接氧化提钒技术OA

Aiming at solving the problems of temperature control in molten bath,iron loss,and grade re-duction of vanadium slag caused by O2 injection in the traditional process of vanadium extraction from hot metal,a new technology using iron oxides(Fe2O3)for vanadium extraction from hot metal was pro-posed in this study,taking advantage of the characteristics of mild indirect oxidation reaction and con-trollable process.Thermodynamic calculations identified Fe2O3 as the optimal oxidizer with recommen-ded addition ranges of 1.5％-6.0％.A systematic investigation was conducted on the effects of Fe2O3 ad-dition ratio,particle size,and bath temperature,revealing the enhancement mechanisms of particle size reduction and temperature elevation on vanadium oxidation.The study further developed a"CaO-Fe2O3"oxidizer system that improves reaction efficiency by lowering the melting temperature.Through pro-cess parameter optimization,the optimal conditions were determined as:reaction temperature 1350℃,4.5％of 0.074-0.5 mm Fe2O3 with n(CaO)∶n(Fe2O3)=0.75.Under these conditions,the reaction reached equilibrium within 2 min,achieving a final V content in the hot metal of 0.016％,oxidation rate of 95.12％,with vanadium slag containing 7.15％V and 1.93％P.This"CaO-Fe2O3"system demon-strates efficient vanadium extraction from hot metal and provides new insights for the development of vanadium extraction technologies.