The invention provides a method for
combustion control during replacement of a hot-blast stove. The temperature of
exhaust gas is increased by increasing the surplus coefficient. At the initial stage of replacement of the hot-blast stove, the gas amount is controlled to be 100000-110000 m<3> / h, the air proportion is 0.6-0.65, the surplus coefficient is 1.04-1.06, the hot-blast stove is heated until the roof temperature is 1320-1350 DEG C and the temperature of
exhaust gas is 240-250 DEG C; and then the gas amount and the air proportion are increased, specifically, the gas amount is controlled to be 110000-120000 m<3> / h, the air proportion is 0.65-0.7, the surplus coefficient is 1.06-1.08, and air flow is driven by air so as to enable the temperature of
exhaust gas to be increased to 390-400 DEG C. By means of the method, the extensive roof and exhaust gas
control mode in an existing hot-blast stove
combustion method is avoided, the stove replacement time can be shortened, fuel consumption is saved, the hot-blast stove can store energy rapidly, the
combustion efficiency maximization of the hot-blast stove is achieved, the effect that heat is sufficient when the hot-blast stove feeds air is ensured, and accordingly higher
air temperature is provided for a
blast furnace.