应用化学反应工程的原理,分析了Fe_3O_4氧化过程颗粒的热状态,表明存在着火现象,并经实验证实。研究揭示出,为保证Fe_3O_4氧化充分,必需使其处于着火状态,但工艺条件的选择还应确保颗粒表面温度低于发生明显烧结和相变温度。确定了氧化反应器适宜的操作区域。 Based on the principle of chemical reaction engineering, the thermal state of the particles in the oxidation process of Fe_3O_4 was analyzed, indicating that there was a fire phenomenon and was verified experimentally. The study revealed that, in order to ensure adequate oxidation of Fe 3 O 4, it is necessary to make it in a state of ignition, but the process conditions should also be selected to ensure that the particle surface temperature is lower than the obvious sintering and transformation temperature. The appropriate operating area for the oxidation reactor was identified.