Isothermal kinetic analysis on reduction of solid/liquid wustite by hydrogen  

作　　者：Jianliang Zhang Yang Li Zhengjian Liu Tengfei Wang Yaozu Wang Kejiang Li Guilin Wang Tao Xu Yong Zhang 

机构地区：[1]School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China [2]School of Chemical Engineering,The University of Queensland,St Lucia,QLD 4072,Australia [3]Institute of Artificial Intelligence,University of Science and Technology Beijing,Beijing 100083,China [4]Inner Mongolia CISP Technology Co.,Ltd.,Wuhai 016000,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2022年第10期1830-1838,共9页矿物冶金与材料学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51874025 and 52174291)。

摘　　要：Isothermal thermogravimetric analysis was used to study the reduction process of solid/liquid wustite by hydrogen.Results show that wustite in both states can be reduced entirely at all temperatures.The thermal and kinetic conditions for the hydrogen reduction of molten phases are better than those when the reactants and products are in the solid state,with a higher reaction rate.The hydrogen reduction of different wustite phases fits the Mampel Power model(power exponent n=1/2)well,and this model is independent of the phase state.The average apparent activation energies of the reduction process calculated by the iso-conversional method are 5.85 kJ·mol^(−1) and 104.74 kJ·mol^(−1),when both reactants and products are in the solid state and the molten state,respectively.These values generally agree with those calculated by the model fitting method.

关 键 词：hydrogen metallurgy iron oxide smelting reduction reduction kinetics 

分 类 号：TF19[冶金工程—冶金物理化学]