钒氧化物在高炉中的还原行为研究

Vanadium Oxide Reduction Behavior in Blast Furnace

通过模拟高炉内部钒氧化物发生还原的三个主要反应区,并运用相关热力学计算,分别研究影响高炉块状带、软熔滴落带及炉缸钒氧化物还原的各种因素。研究结果表明:炉料还原性能的提高有利于钒在块状带的还原;软熔滴落带温度的升高、初渣中FeO量的降低都有利钒的还原;炉缸温度应维持在1 450℃以上,渣铁间V的反应有利于提高铁水V的收得率;硅与钒氧化物的耦合反应,不仅可促进钒氧化物的还原,而且可以降低生铁含硅量。

In order to determine factors influencing the lumpy zone, soft melting and dropping zone and re-duction of vanadium oxide in hearth in blast furnace, a simulation experiment on reduction of vanadium ox-ide has been performed in combination of thermodynamic calculation. The results prove that improving re-duction performance of furnace burden favors reduction of vanadium oxides in the lumpy zone. The increaseof temperature in soft melting and dropping zone and decrease of FeO content in early slag are beneficial forreduction of vanadium. The temperature of hearth should remain above 1 450 ℃, and reaction between slagand iron benefits to improve yield rate of V in molten iron. Reduction reaction between silicon and vanadi-um oxide not only promote reduction of vanadium,but also reduces silicon content of iron liquid.