The influence of the melting intensity, which is defined and estimated as a specific blast-furnace productivity, on the stability of blast furnace operation and extend of indirect reduction of wustite is evaluated and studied. It is shown that at elevated melting intensity - specific productivity the incremental change in the melting intensity leads to a more modest variation in the efficiency of CO utilization. The increase in the stability of the processes in the wustite indirect reduction zone is accompanied by a decrease in the fluctuation of the chemical composition of the hot metal and slag. The theoretical calculations and production data analysis revealed that the higher intensity of blast furnace process leads to more stable furnace' thermal conditions. This is confirmed by operating data of blast furnaces at NLMK-Russia.
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