Effect of Magnetic Field on Reduction of Iron Oxides Containing SiO2 and CaO
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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。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.
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Key words:
- iron oxides /
- reduction /
- magnetic field /
- SiO2/CaO /
- reaction efficiency micromorphology /
- diffusion coefficient /
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