Bel’kova Alla Ivanovna. PhD (Engin.), Senior Research Scientist, Iron and Steel Institute named after Z.I. Nekrasov of the NAS of Ukraine, Academican Starodubova square, 1, Dnipro, Ukraine, 49107; e-mail: alla2904b8@gmail.com, allabelkova8@mail.ru, ORCID 0000-0001-8519-9351

Muravyeva I.G., Dr. Sci. (Engin.),, Head of Department, Iron and Steel Institute named after Z.I. Nekrasov of the NAS of Ukraine, Academican Starodubova square, 1, Dnipro, Ukraine, 49107; email:irinamuravyova@gmail.com

Skachko Alexander Sergeevich, PhD (Engin.), Researcher, Iron and Steel Institute named after Z.I. Nekrasov of the NAS of Ukraine, Academic square Starodubova, 1, Dnipro, Ukraine, 49107

Methods for choosing a rational composition of the blast furnace charge

Summary. The aim of the work is to solve the problem of choosing the
optimal composition of iron ore materials for blast furnace loading. An
analytical review of the existing approaches to assessing the quality and
methods for selecting a rational composition of iron ore materials implemented
as part of the control system of domestic and foreign blast furnaces in modern
conditions has been carried out. A method of modeling the processes of
directional formation of melts, developed at the Iron and Steel Institute, is
proposed. The description of the processes of transformation of iron ore
materials in a blast furnace and the properties of liquid smelting products was
carried out using the parameters of interatomic interaction in melts. The
technique uses a set of integral criteria and physicochemical models that allow
estimating charge, gas-dynamic and temperature melting conditions. The
influence of the quality of iron ore on the properties of primary melts and final
products of blast-smelting is analyzed. An integral indicator of the quality of
the charge and an integral indicator of the temperature blast mode have been
developed. The main difference of the proposed approach to the selection of the
composition of the charge from similar developments focused on the traditional
criterion «basicity of the final slag» is the use of a set of physico-chemical
criteria that characterize the quality and properties of iron ore, primary and final
blast furnace slag. The use of the developed prognostic models and criteria as
part of automated blast furnace control systems allows us to predict the
chemical composition of iron and slag. Stabilization of slag properties within
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the specified limits ensures the smelting of cast iron of the required
composition and a reduction in coke consumption in the current unstable
conditions of smelting iron.
Keywords: blast furnace smelting, iron ore materials, cast iron, blast
furnace slag, integral criterion, predictive model
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