Gas-solid reduction kinetic model of MgO-fluxed pellets |
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Authors: | Qiang-jian Gao Feng-man Shen Xin Jiang Guo Wei Hai-yan Zheng |
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Institution: | 1. School of Materials and Metallurgy, Northeastern University, Shenyang, 110819, China
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Abstract: | The reduction process of MgO-fluxed pellets was investigated and compared with traditional acidic pellets in this paper. Based on the piston flow concept and experimental data, a kinetic model fitting for the gas-solid phase reduction of pellets in tubular reactors (blast furnace, BF) was built up, and the equations of reduction reaction rate were given for pellets. A series of reduction experiments of pellets were carried out to verify the model. As a result, the experimental data and calculated result were fitted well. Therefore, this model can well describe the gas-solid phase reduction process and calculate the reduction reaction rate of pellets. Besides, it can give a better explanation that the reduction reaction rate (reducibility) of MgO-fluxed pellets is better than that of traditional acidic pellets in BF. |
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Keywords: | ore pellets magnesia reduction kinetics blast furnaces |
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