Predictive evaluation of physical and chemical properties of new compositions of chromium-containing ferroalloys

Abstract

The aim of the work was to predict the most significant physicochemical characteristics (melting temperature and density) of new chromium-containing ferroalloys with reduced chromium content and increased silicon content. The applied methodology and criteria for quantitative assessment took into account microheterogeneity of multicomponent metal melts, melting temperature and density. Information about these characteristics is necessary for studying the kinetics of melting, assimilation of the leading elements of ferroalloys by the metal melt, and determining the efficiency of their use. An original approach is used to solve the modeling tasks, which is based on the concept of physicochemical modeling of interatomic interaction processes in melts, developed under the leadership of Professor E. V. Prykhodko. According to the developed concept, metal melts are considered as chemically unified systems, and a change in their composition affects a complex of physical and chemical properties caused by a change in the parameters of their electronic structure. To evaluate and take into account the influence of the microheterogeneity of the structure of melts of ferroalloy systems, the method of calculating criteria (ΔZy and Δd) was used, characterizing the degree of difference in the electronic and structural state of the melt as a chemically unified system, as opposed to a mechanical mixture of their initial components. Using these criteria and experimental ones, the values of the most important physicochemical characteristics of new compositions of chromium-containing ferroalloys, which are missing in the literature, were obtained. The results of the calculation of these properties can be used to change and improve the characteristics of chromium-containing ferroalloys in order to develop their rational compositions.