| Fe-Ni-O体系中Fe/Ni的还原行为 |
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| 引用本文： | 魏文洁, 张延玲, 魏芬绒, 杨小刚, 胡晓军. Fe-Ni-O体系中Fe/Ni的还原行为[J]. 工程科学学报, 2013, 35(3): 288-296. DOI: 10.13374/j.issn1001-053x.2013.03.015 |
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| 作者姓名： | 魏文洁 张延玲 魏芬绒 杨小刚 胡晓军 |
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| 作者单位： | 1.北京科技大学钢铁冶金新技术国家重点实验室, 北京 100083 |
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| 基金项目： | 中央高校基本科研业务费资助项目(FRF-SD-12-009A)国家自然科学基金资助项目(51074025) |
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| 摘 要： | 取电阻炉实验和热重分析等手段,探讨了Fe-Ni-O体系中不同条件下的产物组成及Fe/Ni的还原行为.结果表明:五种样品的还原难度由低到高依次为NiO2O3+Ni2O3+NiO2O42O3;Ni元素能够促进铁氧化物还原,其促进作用由Ni元素的初始状态决定,单质Ni>氧化物NiO>NiFe2O4中的Ni;NiFe2O4的还原过程中各产物由低温到高温依次出现的次序为Fe3O4、Ni、(Fe,Ni)、Fe和Fe0.64Ni0.36.根据实验结果,对五种氧化物体系的还原过程进行了探讨,并获得了活化能、控速环节等重要参数及相关反应机理.
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| 关 键 词： | 不锈钢 粉尘 还原 动力学 活化能 |
| 收稿时间： | 2012-03-01 |
Reduction behavior of Fe/Ni in the Fe-Ni-O system |
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| WEI Wen-jie, ZHANG Yan-ling, WEI Fen-rong, YANG Xiao-gang, HU Xiao-jun. Reduction behavior of Fe/Ni in the Fe-Ni-O system[J]. Chinese Journal of Engineering, 2013, 35(3): 288-296. DOI: 10.13374/j.issn1001-053x.2013.03.015 |
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| Authors: | WEI Wen-jie ZHANG Yan-ling WEI Fen-rong YANG Xiao-gang HU Xiao-jun |
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| Affiliation: | 1.State Key Laboratry of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | The product composition under different conditions and the reduction behavior of Fe and Ni in the Fe-Ni-0 system were studied by electric resistance furnace experiments and thermogravimetric analysis.The order of difficult degree for reducing Fe/Ni oxides in five systems is NiOFe2O3+NiFe2O3+NiONiFe2O4Fe2O3.The existence of Ni can promote the reduction of iron oxides,while the contribution degree depends on its initial state,and the order tends to be metallic NiNiONi released from NiFe2O4.As the temperature increases,the reduction products of NiFe2O4 are in order of Fe3O4,Ni,(Fe,Ni),Fe,and Fe0.64Ni0.36.Based on these experimental results,the reduction processes and the kinetics such as activation energy and rate-controlling step for reducing the five oxides were analyzed and discussed. |
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| Keywords: | stainless steel dust reduction kinetics activation energy |
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