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Non-isothermal Reduction Behavior and Mechanism of Hongge Vanadium Titanomagnetite Pellet with Simulated Shaft Furnace Gases

机译:模拟竖炉煤气对红格钒钛磁铁矿球团的非等温还原行为及机理

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As an integral part of developing a novel clean smelting process for the comprehensive utilization of Hongge vanadium titanomagnetite (HVTM), the non-isothermal reduction behavior and mechanism of HVTM pellet (HVTMP) were investigated using simulated shaft furnace gases of dry pulverized coal gasification (DPCG), water-coal slurry gasification (WCSG), Midrex, and HYL-III in the current study. The results showed that the reduction degree significantly increased with the decrease of heating rate. The reduction degree was found to increase in the order of DPCG
机译:作为开发一种新颖的清洁冶炼工艺以综合利用鸿格钒钛磁铁矿(HVTM)的组成部分,使用模拟干炉煤气化竖炉气研究了HVTM球团矿(HVTMP)的非等温还原行为和机理( DPCG),水煤浆气化(WCSG),Midrex和HYL-III。结果表明,还原度随加热速率的降低而明显增加。发现还原度以DPCG <WCSG <Midrex <HYL-III的顺序增加。可以得出近似相反的线性关系,即降低的HVTMP的抗压强度随着降低的溶胀指数的增加而降低。非等温还原条件下有价值元素的相变可描述为:Fe_(2)O_(3)→Fe_(3)O_(4)→FeO→Fe; Fe_(9)TiO_(15)→Fe_(2.75)Ti_(0.25)O_(4)→Fe_(2)TiO_(4); (Fe_(0.6)Cr_(0.4))_(2)O_(3),Fe_(0.7)Cr_(1.3)O_(3)→FeCr_(2)O_(4); (Cr_(0.15)V_(0.85))_(2)O_(3)→Fe_(2)VO_(4)。然而,在非等温还原条件下,SEM结果表明,即使在1100℃下,还原的金属铁也不能连接在一起以形成均匀的连续区域。这些结果可为HVTM的综合利用提供理论和技术依据。

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