磁场对含SiO<sub>2</sub>和CaO的铁氧化物还原的影响

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名

邮箱

手机号码

标题

留言内容

验证码

磁场对含SiO₂和CaO的铁氧化物还原的影响

基金项目:

国家自然科学基金(51464039)

包头市昆区科技项目

国家自然科学基金(51464040)

1. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China;
2. School of Materials Science and Engineer, Shanghai University, Shanghai 200444, China;
3. Inner Mongolia Key Laboratory for Utilization of Bayan Obo Multi-metallic Resources, Elected State Key Laboratory, Baotou 014010, Inner Mongolia, China

摘要: 为了考察磁场对含有SiO₂和CaO的铁氧化物还原的影响,以93% Fe₂O₃-2.5% SiO₂-4.5% CaO体系为对象,从化学反应效率、物相组成、显微形貌、动力学计算出发,研究了稳恒磁场的作用机制。研究表明,B=1.02 T恒磁场促进了体系还原。与无磁条件相比,在体系气固反应过程中没有新物相生成,显微形貌呈现疏松多孔状,内扩散系数提高1.34倍。
- 铁氧化物 /
- 还原 /
- 磁场 /
- SiO₂/CaO /
- 反应效率 /
- 显微形貌 /
- 扩散系数
Abstract: In order to investigate the effects of magnetic field on the reduction of iron oxides, 93% Fe₂O₃-2.5%SiO₂-4.5% CaO system had been taken to carry out a constant magnetic field（CMF） test. The reduction conversion efficiency of Fe₂O₃, the phase composition and micromorphology of the reaction product, and the reaction kinetics were analyzed. The results show the reduction of Fe₂O₃ has been greatly enhanced in a CMF equal to 1.02 T. Compared with the reaction without a magnetic field, with a CMF（B=1.02 T） there is no new phase formed in the gas-solid reaction and the reduction product exhibits a porous structure. The internal diffusion coefficient obtained in a CMF is 1.34 times higher than that without a magnetic field.
- iron oxides /
- reduction /
- magnetic field /
- SiO₂/CaO /
- reaction efficiency micromorphology /
- diffusion coefficient /