The improvement of air supply operation in the past, the main reason for the long recovery time of furnace condition was the lack of heat storage in the furnace, and there was always a heavy load after air supply. In addition, there is a misunderstanding that when the material line is driving, too much air volume will lead to deeper material line and more difficult driving. Therefore, the operation idea of "full air temperature, rapid air lifting, coal injection in advance, one-time injection to normal coal quantity and proper oxygen enrichment" can be adopted for furnace condition recovery. The specific measures are as follows: 1) The first stage. After blast furnace injection, the silicon content of hot metal in hearth increased slightly, but the physical heat was lower. Due to the influence of coal injection, the thermal effect of coal injection gradually weakened before the wind stopped, so the furnace temperature gradually decreased after air supply. At this time, use all the air temperature to stop humidification, improve the flame temperature in the tuyere area, and improve the physical heat of the furnace as soon as possible. Therefore, the air volume at this stage is small and will not cause air suffocation. The air volume can be increased to 45% of the normal air volume at one time, so as to increase the top temperature and introduce gas as soon as possible and shorten the recovery time. 2) The second stage. Because the short-term damping down has little effect on the furnace condition, after the dry dust removal is put into operation, the blast furnace will increase the wind to 80% of the normal air volume at a faster speed, and at the same time increase the top pressure according to a certain proportion. At this time, the coal is delivered, and the normal coal quantity is sprayed at one time, and the oxygen is enriched appropriately, so as to reduce the influence of overload on the furnace. After that, the furnace temperature will gradually drop, and the return air speed can be slowed down as appropriate. 3) In the process of furnace condition recovery, the temperature of the top of the furnace is too low due to line rush. When the dry dust removal operation is affected, it is best to gradually increase the air volume to increase the top temperature. As long as the ore batch size exceeds the current material quantity of the catch-up line, the catch-up line will not sink deeper and deeper. Using large air volume and large ore batch has obvious effect. When the feed line is deep, the cloth matrix will be adjusted accordingly. Usually, only the ore angle is reduced, and the focal angle is fixed, with marginal development as the main factor. At this time, the center is relatively crushed, and the low feed line to the soft melting zone will inevitably lead to an increase in wind pressure, which will lead to fluctuations in furnace conditions. In addition, the short-term development of marginal airflow has no obvious effect on raising the top temperature. The large blast furnace pursues a suitable development center and a stable marginal airflow, so as to achieve the purpose of stabilizing the upper part and living the lower part. The recovery process of furnace condition is in a slow wind state, and the marginal airflow naturally develops relatively. At this time, the dredging center should be given priority to, which is conducive to rapid air supply. The temperature at the top of the furnace rises rapidly, and the time of grasping the material line is short, which reduces the impact of long-term low material line on the blast furnace.