Complex energy-dynamic model of BOF melting

In practice, so-called static models are widely used to show the oxygen converter process, describing changes in output parameters based on information about input parameters for each individual production cycle (heat). Additionally, the models used in the final period make it possible to ensure a more accurate hit within the specified limits in terms of temperature and carbon content in the metal. In this case, information on the results of intermediate measurement of metal parameters by a probe tuyere, which is carried out during the consumption of 80 – 95 % of the total oxygen consumption for heat, is used as the initial information. To describe the behavior of an object during the process from the beginning to the end of the production cycle, it is necessary to build a model based on the patterns of phase interaction in an open system (oxygen converter – BOF). In this paper, an attempt is made to construct such a model using the concept of a stationary nonequilibrium state and the results of physical and mathematical modeling of the system when the contact area of two non-miscible liquids changes when exposed to a gas jet. When forming the model, we proceeded from the presence in the melt of two main reaction zones of oxidation of components, which, according to modern concepts, determine the mechanism of processes and hydrodynamics of the melt during blowing of the converter bath. For each selected zone, to a large extent, the characteristics of mass transfer during different periods of the operation, depending on the current parameters of the interacting phases, determine the rates of chemical reactions. The results of checking the adequacy of the model using practical data allow us to conclude that the model can be used to study the blowing process in a BOF.