【摘要】 提出煤基直接还原钒钛磁铁矿(VTM)原矿的新方法。结果表明，在较佳的还原条件(还原温度为1140℃，还原时间为3 h，碳/铁摩尔比为1.2:1，预氧化温度为900℃)下，铁还原金属化率为97.8%。最终，通过磁选获得的铁精矿的铁含量和回收率分别为76.78%(质量分数)和93.41%，而磁选渣的钛品位和回收率分别为9.36%(质量分数)和87.07%，钛损失率仅为12.93%。新方法能避免VTM原矿的选矿过程，有效减少铁精矿中钛的含量，提高有价金属的综合利用率。更多还原

【Abstract】 An approach for coal-based direct reduction of vanadium-titanium magnetite(VTM) raw ore was proposed. Under the optimal reduction conditions with reduction temperature of 1140 °C, reduction time of 3 h, C-to-Fe molar ratio of 1.2:1, and pre-oxidation temperature of 900 °C, the iron metallization degree is 97.8%. Ultimately, magnetic separation yields an iron concentrate with an Fe content of 76.78 wt.% and efficiency of 93.41%, while the magnetic separation slag has a Ti grade and recovery of 9.36 wt.% and 87.07%, respectively, with a titanium loss of 12.93%. This new strategy eliminates the beneficiation process of VTM raw ore, effectively reduces the Ti content in the iron concentrate, and improves the comprehensive utilization of valuable metals.更多还原