采用高温实验炉，在1 350 ℃，氮气保护气氛条件下对钒钛磁铁精矿内配碳球团进行了阶段还原试验，通过TG-DSC、XRD、SEM等检测方法对不同时间内配碳球团还原的组织成分、显微结构等进行研究。结果表明，钒钛铁精矿的还原历程依次为Fe2TiO4和Fe3O4、3(Fe3O4)·Fe2TiO4、Fe3O4·Fe2TiO4、Fe2TiO4和FeO、Fe和FeTi2O5；在磁铁矿大量还原生成浮士体的阶段，钛铁矿与新生成的浮士体发生“钛铁晶石化”，最终还原转变为单质铁和含铁黑钛石。

By using laboratory high temperature experimental furnace, stage reduction test on vanadium and titanium iron concentrate with carbon-containing pellets under experimental conditions of 1 350 ℃ and in nitrogen atmosphere is introduced，and its tissue composition, microstructure is also studied by TG-DTA, XRD, SEM and other testing method. The experimental results show that reduction process on quick reduction of vanadium and titanium iron concentrate of carbon-containing pellets respectively is Fe2TiO4 and Fe3O4, 3(Fe3O4)·Fe2TiO4, Fe3O4·Fe2TiO4, Fe2TiO4 and FeO, Fe and FeTi2O5. In the stage of generating float by magnetite iron reduction, the new phase of Fe2TiO4 is generated, and finally vanadium and titanium iron concentrate is reduced into Fe and (Fe,Mg)Ti2O5.

国家重点基础研究发展计划资助项目(2007CB613503)