本文分析了几种竖炉气体流动的特点,并指出冷却气单独循环的竖炉必须保持冷却气出口与还原气入口有一定的距离。提出了冷却气小循环设计控制参数;|P_还-P_冷|≤h_失×10％。通过适当地修正,气体在炉内散料柱的阻力损失可以看成在静态炉料中的运动来研究。还讨论了气体通过散料柱的阻力损失,指出了竖炉是一种制铁效率很高的设备。 In this paper, the characteristics of gas flow in several shaft furnaces are analyzed. It is pointed out that the shaft furnace with the cooling gas alone must keep the cooling gas outlet at a certain distance from the reducing gas inlet. Proposed a small control of cooling gas design parameters; | P_ also-P_ cold | ≤ h_ loss × 10%. With appropriate modifications, the loss of resistance of the gas in the furnace bulk string can be considered as a movement in the static charge. The loss of resistance through the bulk material column was also discussed, pointing out that the shaft furnace is a highly efficient system for making iron.