微纳米氧化铁粉低温还原动力学及机理的研究

上海金属, 2008, 30(5): 44-51. doi: 10.3969/j.issn.1001-7208.2008.05.010

微纳米氧化铁粉低温还原动力学及机理的研究

李运佩 ^1, , 王兴庆 ^2, , 戴瑞光 ^3, , 林峰 ^4,

1.上海大学材料工程学院,上海,200072

2.上海大学材料工程学院,上海,200072

3.上海大学材料工程学院,上海,200072

4.上海大学材料工程学院,上海,200072

关键词：微纳米氧化铁粉 , 低温还原 , 还原动力学 , 还原机理

RESEARCH ON THE MECHANISM AND KINETICS OF REDUCTION OF MICRON NANO FERROUS OXIDE POWDER AT LOW TEMPERATURE

研究了<1μm氧化铁粉在500℃、380℃、260℃、150℃温度下氢还原时,还原温度和氧化铁粉粒度对还原率、还原过程和还原产物相结构的影响.结果表明,500℃和380℃下还原速度较快,分别在15和23min后即能完成还原.在260℃和150℃下还原甚为缓慢;粉末粒度的细化在还原初期可明显提高还原速度,但随着还原反应的进行,在试验条件下粒度对反应的有利影响逐渐减缓;在温度<570℃的低温下氧化铁还原过程经由Fe2O3→Fe3O4→Fe两步进行,其整个反应速率受控于Fe3O4还原为Fe的反应过程,实验中并没有发现富氏体的存在.

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材料期刊网

微纳米氧化铁粉低温还原动力学及机理的研究

RESEARCH ON THE MECHANISM AND KINETICS OF REDUCTION OF MICRON NANO FERROUS OXIDE POWDER AT LOW TEMPERATURE

参考文献