Research Of A Mathematical Model For Burden Distribution Of Bell-moval Armour Blast Furnace

Burden distribution of blast furnace top is the main factors which influence the gas flow distribution, ore reduction, heat exchange between burden and gas flow, fuel ratio and blast furnace campaign life. In order to control burden distribution precisely, the physical phenomena which influence the burden distribution in the process of burden charging should be analysed, and the rule between charging condition and burden distribution should be searched, and the relation between control means and burden distribution should be modelized. The basic factors which influence the burden distribution and gas flow distribution of the blast furnace top include the falling trajectory and hit point of burden, repose angle of the burden in blast furnace, the collapse phenomon of coke layer, size segregation when burden piling up, et.al. This paper put forward the reasonable mathematical formula which simulate refered physics phenoma, develop mathematical model and develop computer program, show the burden flow trajectory, the formation process of burden layer, the ratio of ore to coke, radial distribution of size, radial distribution of gas flow velocity and establish the burden distribution mathematical model of bell top blast furnace on the basis of analyzing the basic factors and combine the real condition of bell-movable armor blast furnace.Then this paper use the mathematical model to find the rule between charging condition and burden distribution, gas flow distribution, and to explain the influence of charging means on burden distribution and gas flow distribution quantitatively. The model established provide theoretical basis for researching and developing the charging technology of bell-movable armor blast furnace, and laid foundation for the realization of automatic control of the technology in pratice.