THE ANALYSIS OF SIMILARITY CONDITIONS AND THE METHODOLOGY OF HIGH-TEMPERATURE MODELING OF CONVERTER PROCESSES. MESSAGE 1

The working space of the converter is considered as a set of separate reaction zones, which contributes to the study of the mechanism of physico-chemical phenomena in each zone and in the oxygen jets – metal – slag – exhaust gas system as a whole. The fulfillment of similarity conditions allows high-temperature modeling to be qualitatively implemented in a certain range, and a partial violation of one or another of the considered similarity conditions will lead to the implementation of only approximate modeling. The analysis and substantiation of the main provisions of the methodology of high-temperature modeling of the converter process with combined purging of the converter bath has been performed. The basic conditions of aerohydrodynamic and dynamic similarity are formed when using multi-pulse gas flows for purging a melt, which, together with the conditions of geometric and physical similarity, make it possible to transfer the results obtained from the model to the sample with greater reliability. A technological map is developed preliminarily for each experiment, providing the specified parameters of blast and slag melting modes using fractional lime and fluorspar additives. The considered conditions and the basic dimensionless similarity criteria make it possible to transfer the results obtained to industrial designs. A set of laboratory facilities and techniques has been developed and improved that make it possible to visualize the interaction of gas jets with a slag-metal emulsion in a converter using photo and video recordings, to obtain information about the parameters of the reaction zones formed and the gases escaping to the surface of a metal bath.

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