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利用光学体视显微镜和高温热台对CO气体还原Fe2O3过程进行原位观察,并结合扫描电镜、能谱和红外光谱分析,研究掺入CaO对还原过程中铁晶须生成和生长机理的影响.实验结果表明:铁晶须是在实现FeO→Fe转变时形成和不断生长的;CaO对氧化铁的还原有抑制作用,当掺入CaO质量分数≥8%时,没有铁晶须生成和生长.因此,可以通过控制CaO掺入量的方式抑制铁晶须的生成和生长,进而减少矿粉颗粒团聚的发生.
The reduction of Fe2O3 by CO gas with optical microscope and high temperature hot stage was observed in situ and the effect of CaO incorporation on the formation and growth mechanism of Fe (OH) 2 whiskers was investigated by scanning electron microscopy, energy dispersive spectroscopy and infrared spectroscopy. The results showed that the ferrite whiskers formed and grew continuously during the transformation of FeO → Fe, CaO inhibited the reduction of ferric oxide, and no iron whiskers were formed and grown when the mass fraction of CaO was ≥8%. , Can inhibit the formation and growth of iron whiskers by controlling the amount of CaO incorporated, thereby reducing the occurrence of slag particles agglomeration.