The oxygen converter is one of the most important metallurgical objects of automation. Improvement of its control is necessary to obtain steel with a given temperature and composition at maximum efficiency of the heat. However, the task of fully automating the process is extremelycomplex and requires knowledge of the laws governing the influence of many factors on the technological process: physicochemical, gas–hydrodynamic, and others that have not been sufficiently studied to date. The physicochemical basis of steel production in the converter is formed by the processes of oxidation of pig iron impurities, and primarily carbon oxidation. Despite the large amount of research devoted to the problem of metal carbon oxidation, a significant number of questions in this area remain little studied. The well–known scientific theory that decarburization at a low carbon content is controlled mainly by its mass transfer does not fully explain all the features of the process. In this regard, the problem arose of conducting additional scientific studies of the dynamics of carbon oxidation, especially at its low concentration.The work describes the techniques that describe the decarburization process of converter steel. A model for calculating the decarburization rate and the dynamics of the carbon content in the converter bath during purging was built. It has been established that the developed dynamicmodel of carbon oxidation is adequate to the processes occurring in the converter bath. The model allows continuous monitoring and regulation of the most important parameters of the metal by means of controlling an oxygen lance, determining the rates of decarburization, changes intemperature and oxidation of iron in the bath, as well as the degree of afterburning of CO in CO2 in the converter cavity.