Development and Validation of Kinematical Blast Furnace Model with Long-term Operation Data

Abstract

In order to operate a blast furnace properly, the future prediction of process variables by a transient model based on kinetics is useful. In general, such a kinematic blast furnace model includes uncertain factors regarding reaction rates and heat transfer. However, any guideline of adjusting such factors to reproduce actual transition of process variables has not been fully discussed in the literature. In this research, we developed a transient two-dimensional (2D) model for online use, and then discussed an adjustment method to reproduce the behavior of process variables when the reducing agent ratio (RAR) is changed from the viewpoint of mass and heat balance with the Rist diagram. It was found that appropriate consideration of the chemical reserve zone and the heat balance of the furnace was effective to fit the developed model to the actual data.