The purpose of the research in hot metal desulfurization process is to identify the main process parameters affecting the final effect of desulfurization. Therefore, the measurable effect of the actions taken should be the improvement of the quality of control. One of the important elements of the project was the physical modelling of the phenomenon of mixing the metal bath during desulfurization. For this purpose, a physical model of an industrial stand was built on a scale of 1: 10, in which measurements were carried out for various variants of the process implementation - parameters such as the flow of gas transporting reactants, the height of the lance position and its internal diameter were regulated. On the basis of the obtained results, the real impact of the method of supplying the desulfurizing agent on the time of complete mixing of the metal bath was assessed. The conducted research became the basis for developing a model of mixing hot metal during desulfurization. Thanks to the availability of both technical and process data of the metallurgical reactor as well as qualitative data of hot metal, it is possible to develop a comprehensive model of desulfurization. The proposed model was based on the tank theory. In the future, this solution will make it possible to simulate the desulfurization process, taking into account all relevant parameters, during the process in a time shorter than the real desulfurization time.Keywords: Desulfurization, hot metal, extractive metallurgy, mathematical modeling, physical modeling
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