Abstract: A new method of calculating charging profile was proposed which based on the mechanism of material movement in the charging process and improved the correction method of material flow path. As the model takes into account the effects of charge characteristics， coke collapsing and other factors on the charging profile， it makes the simulation results more accurate in practice. When its setup combines with industrial conditions， the model can calculate the parameters of charging profile， radial distribution of material， radial O/C rate and etc. under different charging systems. The area coke load index of blast furnace (BF) has been defined which makes it more evident when comparing the difference of various charging system. Using the model， some existing problems in large BF could be solved and also the practical suggestion can be proposed for the actual production. The model could further provide theoretical guidance of adjusting charging system for BF operators.

Key words: large blast furnace, burden charging model, material flow path, charging profile, charging system