Improving the Efficiency of a Blast Furnace and Increasing its Campaign with Mathematical Models Run in Real Time as Part of the Automatic Process Control System

Improving the durability of the masonry of a blast-furnace, along with increase in its output and reduction in coke consumption, is an important task of blast-furnace control. The most important factor of accomplishing these tasks is control of the temperature of the materials at the upper boundary of the tuyere zone and the belly and bosh adjacent to the furnace masonry at the bottom of the stack. A one-dimensional mathematical model run in real time as part of the automated process control system of the MMK BFs is used to solve the problems of gas dynamic and heat- and mass transfer processes between the stockline and the iron taphole (Domna model), and a two-dimensional mathematical model is used to additionally describe all the processes, including melting, in the vertical section of the furnace (Kogeziya model).