The adhesion of fine iron ore particles during fluidized bed reduction was studied using pressurized visible fluidized bed laboratory equipment. The results showed that the optimal operating parameters for pure hydrogen reduction under high pressure were reduction temperature of 1073 K, particle size of 0.18–0.66 mm, pure H₂ linear velocity of 0.8 m/s, reduction pressure of 200 kPa, and reduction time of 50 min. When plastic particles were mixed into the fluidized bed, the optimal parameters were reduction temperature of 973 K, particle size of 0.18–0.66 mm, pure H₂ linear velocity of 0.8 m/s, reduction pressure of 100 kPa, mass content of plastic particles of 8%, and reduction time of 65 min. The chemical reaction resistance is much higher than the inner diffusion resistance at the initial stage of the reaction, whereas, in later stage, the inner diffusion resistance exceeds the chemical reaction resistance. The contact area of iron atoms or iron whiskers gradually decreases with the increase in reduction pressure from 0.20 to 0.45 MPa, and the sticking trend gradually decreases. Adding plastic particles in the fluidized reduction process of fine iron ore can effectively inhibit the adhesion among fine iron ore particles.

使用加压可见流化床实验室设备研究了流化床还原过程中细铁矿石颗粒的附着力。结果表明，高压下纯氢气还原的最佳操作参数为：还原温度为1073 K，粒径为0.18–0.66 mm，纯H ₂线速度为0.8 m / s，还原压力为200 kPa，还原时间50分钟 当将塑料颗粒混合到流化床中时，最佳参数是还原温度973 K，粒径0.18–0.66 mm，纯H ₂线速度为0.8 m / s，减压压力为100 kPa，塑料颗粒的质量含量为8％，还原时间为65分钟。在反应的初始阶段，化学反应阻力比内部扩散阻力高得多，而在后期阶段，内部扩散阻力超过化学反应阻力。铁原子或铁晶须的接触面积随着减压压力从0.20 MPa增加到0.45 MPa而逐渐减小，并且粘附趋势逐渐降低。在细铁矿的流化还原过程中添加塑料颗粒可以有效地抑制细铁矿颗粒之间的粘附。