论文部分内容阅读
对提钒尾渣中钒、铬氧化物碳热还原热力学进行分析计算,结果表明,钒氧化物的还原顺序为:V2O5→VO2→V2O3→VO→VC→[V],铬氧化物的还原顺序为:Cr O3→Cr O2→Cr2O3→Cr4C→[Cr]。采用50 k VA电弧炉进行提钒尾渣含碳球团进行熔融还原,考察了配碳量和碱度对钒铬在渣铁间的分配比和铁、钒、铬回收率的影响。试验结果表明:随着配碳量的增加,钒、铬在渣铁间分配比增加,铁、钒、铬的回收率下降;随着碱度的增加,钒、铬在渣铁间分配比下降,铁、钒、铬回收率升高;提钒尾渣电弧炉熔融还原较适宜的配碳量为12%~14%,较适宜的碱度为1.0~1.1,在此条件下,铁、钒、铬的回收率可达90%以上。
The thermodynamics of carbothermal reduction of vanadium and chromium oxide in vanadium-bearing tailings are analyzed and calculated. The results show that the reduction order of vanadium oxide is V2O5 → VO2 → V2O3 → VO → VC → [V], and the reduction order of chromium oxide Is: Cr O3 → Cr O2 → Cr2O3 → Cr4C → [Cr]. The 50k VA arc furnace was used to carry out the melting reduction of vanadium-bearing tailings carbonaceous pellets. The effects of carbon content and alkalinity on the distribution ratio of vanadium and chromium between iron-slag and iron, vanadium and chromium were investigated. The results showed that with the increase of carbon content, the distribution ratio of vanadium and chromium increased, the recovery of iron, vanadium and chromium decreased. With the increase of alkalinity, the distribution ratio of vanadium and chromium decreased , And the recoveries of iron, vanadium and chromium increased. The more suitable carbon content for the reduction and reduction of vanadium tailings arc furnace was 12% ~ 14%, and the more suitable alkalinity was 1.0 ~ 1.1. Under these conditions, , Chromium recovery rate of up to 90%.