Gas-solid reduction kinetic model of MgO-fluxed pellets  

作　　者：Qiang-jian Gao Feng-man Shen Xin Jiang Guo Wei Hai-yan Zheng 

机构地区：[1]School of Materials and Metallurgy,Northeastern University

出　　处：《International Journal of Minerals,Metallurgy and Materials》2014年第1期12-17,共6页矿物冶金与材料学报（英文版）

基　　金：financially supported by the Natural Science Foundation of China(Nos.51374061 and 51074040)

摘　　要：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.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.

关 键 词：ore pellets MAGNESIA REDUCTION kinetics blast furnaces 

分 类 号：TF046.6[冶金工程—冶金物理化学] TQ226.61[化学工程—有机化工]