On air supply to the converter

Abstract

Air supply to the converter is one of the determining characteristics of its operation. The productivity of converters under any conditions is ultimately determined by the amount of air blown in through the tuyere. Meanwhile, the question about the regularities of air blowing in relation to converters of non-ferrous metallurgy in modern literature is poorly covered. Many practical issus of converters operation are still unclear. For example, there are completely different opinions on the rational diameter of tuyere, there is no definite opinion on the angle of their inclination, cleaning mode and, most importantly, there is no any justification of the value of the so-called throughput capacity of tuyere, per 1 cm2 of cross-section. This throughput, conditionally recommended by practical data in the range of 0.8-1.0 Nm³/cm²·min, is, in fact, the only quantitative characteristic of the converter air regime, taken as a baseline for calculations in the design and operation of converters. Obviously, such throughput capacity of the tuyere is insufficient for characterization of air blowing, as it does not allow to reveal mutual dependence of many blowing parameters, converter operation conditions and other factors.

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