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通过煤粉还原铁矿粉试验,研究了反应罐工艺模式下催化剂对煤基铁矿还原反应的催化规律。试验结果表明:通过配加催化剂的方式可以显著加快铁矿还原反应速度,其中向煤粉中加入催化剂的催化效果要好于加入矿中;增加催化剂配加量、降低反应温度和减小煤粉粒度均有利于改善催化剂的催化效果,适宜的催化剂配加量应小于5%,考虑到布料操作和反应效率的影响,煤粉粒度和添加催化剂后的反应温度应控制在0.074～0.15mm和1050～1100℃;此外,煤种对催化剂的催化效果也有较大影响,煤粉的固定碳含量越高越有利于催化剂发挥显著的作用。
Through the pulverized coal reduction of iron ore, the catalytic behavior of the catalyst on the reduction of coal-based iron ore was studied. The experimental results show that the reduction rate of iron ore can be remarkably accelerated by the addition of catalyst. The catalytic effect of adding catalyst to pulverized coal is better than that of adding ore into ore. The increase of catalyst dosage, the decrease of reaction temperature and the decrease of pulverized coal particle size All of which are helpful to improve the catalytic effect of the catalyst. Appropriate dosage of catalyst should be less than 5%. Considering the influence of fabric operation and reaction efficiency, the particle size of coal and the reaction temperature after adding catalyst should be controlled at 0.074 ~ 0.15mm and 1050 ~ 1100 ℃; In addition, the catalytic effect of coal on the catalyst also has a greater impact, the higher the fixed carbon content of the pulverized coal is more conducive to the catalyst play a significant role.