Nadtochiy A. Physico-chemical analysis of the distribution of manganese and phosphorus in obtaining high-carbon ferromanganese and charge slag in order to improve the process

Dissertation is devoted to improving the production technology of high-quality manganese ferroalloys by justification the rational choice of charge materials in obtaining a given quality of alloys. On the basis of complex investigations suggested as a criterion for the prediction of thermodynamic properties of components metal and slag systems, to use the integral and partial atomic interaction parameters, and obtain a unified expression for determining the activity of phosphorus, manganese and iron in the melt for various multi-component systems based on manganese. Developed predictive models for calculating the distribution coefficients of elements between slag and metal, depending on the composition of the initial charge and the parameters of the technological regime for the conditions JSC "NZF", which are derived from the "convolution" of physical and chemical information on the composition of charge materials. Worked out balance equations which are used for the construction of static model of receipt of littlephosphorous slag and high-carbon ferromanganese with the simultaneous receipt of charge manganese slag and developed a software tool for rapid calculation of the composition of products depending on the chemical composition of the charge and technology parameters, which is passed of JSC "NZF" for solving the problem of the choice of the charge for a given quality alloy.