Oven drying method of hot blast stove

An exhaust pipeline is temporarily installed between the hot-blast stove and a chimney, a residual oxygen meter and a valve are arranged in the exhaust pipeline, and in the stove drying process, by adjusting the air-fuel ratio and the opening degree of the valve, the flue gas oxygen content detected by the residual oxygen meter is made to be smaller than 0.5%, and the difference value between the atmospheric pressure and the pressure in the stove is kept to be 0-0.5 kPa. The residual oxygen meter is used for monitoring the air-fuel ratio, so that the smoke generation amount is kept in a proper range, the situation that the temperature of a grate supporting column area rises too fast due to generation of too much smoke is avoided, and the situation that the furnace cannot be dried due to too little smoke is also avoided. The pressure in the hot-blast stove is maintained in a micro-negative pressure state by adjusting the valve, so that the flow speed of smoke passing through a grate supporting column area is c