А. V. Lychev , E. N. Vinogradov, I. V. Loginov, Lengipromez, Severstal Metallurgical Works; alychev@yandex.ru

A new scheme is proposed for determination of the blast volume delivered into the blast furnace by balance of the air flows and their enthalpies. An analysis of the errors in determination of losses by the proposed method with due consideration of the measurement errors of the included variables has been carried out. The adequate information on the hot blast flow rate into the furnace hearth will allow to decrease the specific coke rate even at the start, i.e., prior to putting into operation of the smelting thermal conditions control system at the expense of increasing the natural gas-to-blast ratio without any risk of decreasing the theoretical combustion temperature below its critical value.

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