The purpose of this work is to implement a new approach to the description of the duration of melting (dissolution) of complex new generation ferroalloys during the deoxidation and doping of a metal melt. This approach is aimed at developing a methodology and criteria for the quantification and accounting of the micro-heterogeneity of multicomponent metal melts and their prediction on such important for steelmaking production characteristics as the melting time of ferroalloys, the description of the inter-mine interaction, which allows a deeper understanding of the process. deoxidation and refining of steel. In the work, the approach developed in the Institute of Ferrous Metallurgy of the National Academy of Sciences of Ukraine to solve problems of modeling of non-conformities that relate the composition, structure and properties of melts is used in the work. It is based on the original concept of physicochemical modeling of the processes of interatomic interaction in melts and solutions, developed by E.V. Prihodko. According to it, metal melts are considered as chemically unified systems. Changing their composition affects the complex of physicochemical properties due to changes in the parameters of their electronic structure. The method of calculation of criteria (∆Zy and d), characterizing the degree of difference between the electronic and structural state of the melt, as a chemically unified system, from the mechanical mixture of their initial components and the parameter was used to evaluate and account for the influence of the micron homogeneity of the structure of the metal melts of ferroalloy production. ρl, which takes into account the cluster spin in metal melts. Using these criteria and the available experimental data, analytical dependences were obtained to calculate the melting time of complex (ma-manganese, vanadium, niobium and boromatic) ferroalloys of the new generation. This will allow them to evaluate their effectiveness of application, which is associated with the highest assimilation of the main elements that affect

The aim of the work is to create a base of physical and chemical knowledge with blocks of operational analytical expressions that predict the complex properties of metal, slag melts and additives. The base is designed for a scientifically sound product of control actions for the purpose of directed formation of high-quality metal when bringing steel to the UCP. As a basis for describing the processes of interaction of phases in the work used the original method of physico-chemical modeling of the composition and properties of metallurgical melts, as well as experience in creating information and analytical systems for forecasting and controlling the smelting process. Models for forecasting the properties of steels and alloys for special purposes (chromium-nickel, iron-carbon steels of a wide range, aluminum, magnesium, heat-resistant nickel alloys) and ferroalloys of domestic production have been developed. High accuracy of forecast and stability of analytical expressions is obtained, which is confirmed by comparison with calculations on a software computer complex. The possibility of using interatomic interaction parameters to determine the activities of components in binary and multicomponent metal systems is shown. On the example of steel 09G2C, the structure of models for the distribution coefficients of elements, in particular Si and Mn, between the products of smelting during ladle processing was generated. The structural similarity of the models for determining the distribution coefficients of these elements is revealed, which is due to their proximity to the structure of clusters of one-component melts. The results of the work should be recommended for integration in ASNI and ASUTP of steel production in order to form a competitive end product.

The aim of the work is to study the possibility of using integral and partial model parameters of interatomic interaction for the systematic study of the most important consumer properties of nickel ferroalloys used for alloying steel and alloys. In the work, a new approach developed at the Iron and Steel Institute of the National Academy of Sciences of Ukraine was used to solve the problems of predicting the properties of alloys, connecting the composition, structure and properties of melts. Using experimental data on the heat of melting, heat capacity, thermal conductivity, thermal diffusivity of ferronickel, ferroboron, ferromolybdenum, ferro-tungsten, ferrozirconium and other ferroalloys, equations were obtained which made it possible to estimate these properties in advance. Analysis of the experimental data showed that the density of liquid iron-nickel-chromium alloys and their melting points are closely related to the interatomic interaction parameters. Using the parameters of interatomic interaction and experimental data, equations were obtained to describe the dependence of the crystallization temperature, specific density, specific heat capacity, thermal conductivity of nickel-chromium-containing ferroalloys on the parameters of interatomic interaction. Using the above equations, model melting points and ferronickel densities (FN-5M) were estimated using model prediction. The developed semi-empirical models can be used to predict the properties of standard grades of ferroalloys both within a single grade and the entire range of ferroalloys. This allows you to evaluate the effectiveness of the use of ferroalloys at the main stages of steelmaking.

One way of increasing the quality of fused materials and improving their service properties lies with the choice of the rational chemical composition for the starting components. However, information on the influence of the chemical composition of oxide systems on the properties of such materials is limited, which makes it necessary to study them by the prognosis method.To solve this problem we used the physicochemical model of oxide fusions [i], treating the multicomponent liquid as a chemically single system, the change in the properties and reaction capacity of which is determined by the corresponding changes in the chemical and structural states, depending on the composition.The characteristics of this state are the model parameters: be, defined as the number of electrons taking part in the formation of the mean statistical bond between the atoms in the structure of the corresponding melts, and fulfilling the role of the chemical equivalent of the composition, and also the stoichiometry factor p, equal to the ratio of the number of cations to the number of anions in i00 g of oxide melt.The model parameters for the oxide melts were calculated on the "Minsk-22" computer or the ES-I022 using the specially developed program.The inputs consisted of data on the chemical composition and memory-stored information on the individual properties of the cations and anions (charge, radius, internuclear distances, etc.) obtained by solving the system of equations:RUMe+RUE"~-dMe_E , lg Ru~e=lg Ru~e--(Zm~n+Ae/2 ) tg aMe), lg Ru E =Ig Ru~-(Z~,+Ae/2) tg where Me and E are indices for the cations and anions; RU~e and Ru~ are the nonpolarized radii of the atoms in the unexcited state; tan a E and tan ~Me are parameters characterizing the chemical individuality of the elements (change in density of the state at the Fermi surface); RUMe and Ru E are the radii of the nonpolarized ions in the bond Me --E; ZMe = ZminM e + Ae/2, Z = ZminE+ &e/2; be is the number of electrons localized on the bonding orbits of the Me--E bonds.The magnitudes Ruo and tan ~ for all elements were calculated [2].The attempt to use these model parameters to describe the relationships between composition, the characteristics of the structure, and the properties of fusion-cast materials is due to the close link between p and Ae and the combination of the physicochemical properties of oxide melts.As a result of the processing of the experimental data given for viscosity n, surface tension ~, and electric conductivity ~ at various temperatures for the oxide melts (SiO2 0--70 ~, AI~O30--54 ~,CaO 0--62 ~, MgO 0--47 ~, FeO 0--45 ~, MnO 0--60 ~,Na~O 0--12 ~ CaF2 0--20~) equations were obtained [3] enabling us, with a high degree of accuracy, to predict these properties for the following multicomponent systems:Ig Thsoo=6, O47Ae(N. sec/m 2 ), lg rl t4oo= 7, 043Ae (N. sec/m z ), o155o=606,04Q+ 39,73Ae (raN/m), IgxJsoo=8,.