The Estimation of Gas Flow in The Blast Furnace by a Mathematical Model for Burden Distribution

摘要

It was constructed a mathematical model for burden distribution in the blast furnace that was consisted of the calculation of burden trajectory, optimization of burden descending velocity suitable for estimating the real base line and adoption of plural inclination angle of coke layer. It was confirmed that this mathematical model could represented the real ratio of ore to coke layer thickness. Although the particle size distribution in the radial direction was assumed to be constant because it depend mainly on the charging system, the calculated gas velocity distribution based on Ergun's equation corresponded well on the measured one. Moreover it was ascertained that the temperature distribution measured by a shaft sonde could represent the gas velocity distribution at the shaft part of blast furnace.