Construction and application of blast furnace blocky zone pressure difference model

The invention relates to construction and application of a pressure difference model of a blast furnace blocky zone, which comprises the following steps: 1) dividing the blast furnace blocky zone into a central coke area and a coke-ore mixing area, and respectively establishing equations for area sectional areas and voidage of the two areas; establishing a pressure difference model through a pressure balance principle; 2) acquiring a central coke area sectional area model, and calculating the radius and sectional area of a central coke circular area; (3) calculating the average cross-sectional area of the coke-ore mixing region in the blocky zone; (4) material column resistance coefficient models of the two areas of the blocky belt are obtained, the resistance coefficient of the center coke area is obtained through calculation of the coke void degree, and the resistance coefficient of the coke-ore mixing area is obtained through calculation of the natural accumulation void degree, the ratio of the thickness o