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| Oxidizing kinetics of reducing gas during iron oxide reduction process |
| GUO Pei-min，ZHAO Pei，WANG Lei，KONG Ling-bing |
| （New Metallurgy Hi-Tech Group Co.， Ltd.， China Iron and Steel Research Institute Group， Beijing 100081， China） |
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Abstract To research the process of reducing gas oxidized by iron ore，gas efficiency of single or monolayer iron oxide particle during gas-based reduction process was calculated through formula and coupled kinetic model of iron oxide reduction and reducing gas oxidation was established by theory and experiment in different reactors.The results show that gas efficiency is relatively high when reduction fraction is low， and drops gradually with the reduction fraction increasing through the reduction experiments of single iron oxide reduction process with hydrogen and iron oxide at fixed and fluidized bed. It is advantageous to increase reduction fraction of iron ore and gas efficiency by pulverizing oreand increasing reaction rate constant （including temperature， high quality reducing gas， catalyst）.Increasing gas flow helps iron ore reduction， but it induces gas efficiency drop.
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Received: 06 March 2017
Published: 07 September 2017
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2017, Vol. 52 
