Due to the instability of FeO at temperatures below 843 K, the fluidization reduction pathway of iron ore powder changes with the reduction temperature. Thus, the effect of temperature and reaction pathway interaction on the kinetics of fluidization reduction of iron ore powder under low-temperature conditions ranging from 783 to 903 K was investigated to describe the fluidization reduction rate of iron ore powder from three aspects: microstructure change, reaction limiting link, and apparent activation energy of the reaction, exploring their internal correlation. The experimental results revealed that in a temperature range of 783–813 K, the formation of a dense iron layer hindered the internal diffusion of reducing gas, resulting in relatively high gas diffusion resistance. In addition, due to the differences in limiting links and reaction pathways in the intermediate stage of reduction, the apparent activation energy of the reaction varied. The apparent activation energy of the reaction ranged from 23.36 to 89.13 kJ/mol at temperature ranging from 783 to 813 K, while it ranged from 14.30 to 68.34 kJ/mol at temperature ranging from 873 to 903 K.

由于FeO在843 K以下的温度下不稳定，铁矿粉的流态化还原路径随还原温度的变化而变化。因此，研究了783~903 K低温条件下温度和反应路径相互作用对铁矿粉流态化还原动力学的影响，从微观结构变化、反应限制环节和反应的表观活化能，探索它们的内在关联。实验结果表明，在783~813 K温度范围内，致密铁层的形成阻碍了还原性气体的内部扩散，导致气体扩散阻力较高。另外，由于还原中间阶段限制环节和反应途径的不同，反应的表观活化能也不同。在783~813 K温度范围内，反应的表观活化能为23.36~89.13 kJ/mol，在873~903 K温度范围内，反应表观活化能为14.30~68.34 kJ/mol。