Method for adding net coke in blast furnace long-term damping-down furnace burden

The invention discloses a method for adding net coke in blast furnace long-term damping-down furnace burden, and mainly solves the technical problems that in the prior art, the temperature drop in a blast furnace with the damping-down time larger than or equal to 72 h is large, the air permeability of a stock column is poor, and the furnace condition of the blast furnace is slowly recovered after re-blowing. According to the technical scheme, the adding method for the net coke in the blast furnace damping-down furnace burden with the damping-down time larger than or equal to 72 h comprises the steps that 1, the furnace burden temperature drop in a blast furnace is determined; (2) determining furnace burden loss heat in the blast furnace in the damping-down process of the blast furnace; 3) determining the addition amount of net coke in the damping-down material of the blast furnace; (4) determining the adding position and adding amount of net coke in a low-temperature reduction pulverization area in the dampin