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Information × Registration Number 0221U101010, 0118U000079 , R & D reports Title Elaboration of scientific ideas about the structural state of slag melts for a reasonable choice of their chemical composition, which will ensure the efficiency of the refining process in the production of pig iron and steel popup.stage_title Head Tohobytska Darya М., д.т.н. Registration Date 12-01-2021 Organization Institute of Ferrous Metallurgy. ZI Nekrasov of the National Academy of Sciences of Ukraine popup.description2 The aim of the work is to reveal the relationship between the viscosity and electrical conductivity of metallurgical slag melts and to develop a heterogeneous state criterion for choosing the chemical composition of the slags that will ensure the metal refining process. The paper analyzes the dependence of the viscosity and electrical conductivity of melts of slag-forming mixtures on their chemical composition and temperature, experimental measurements of viscosity, electrical conductivity and melting temperatures of slag-forming mixtures. Improved predictive models for calculating the viscosity and enthalpy of the final blast furnace slag in the temperature range of 1300-1550 ºС for their rapid assessment in the modern conditions of blast furnaces in Ukraine. It is shown that the activation energies of viscosity (Еη) and electrical conductivity (Еχ) of slag melts decrease with increasing temperatures, and the ratio Еη / Еχ = n changes in the regions: Еη <Еχ = n <1, Еη> Еχ = n> 1 and Еη≈ Еχ = n≈1, characterizing the change in the relationship of structural particles of the melt, and therefore its structure, and can be a criterion for assessing the structure of slag melts. The value of basicity of blast-furnace slags CaO / SiO2 = 1.2 is recommended, this provides a decrease in energy costs for the formation of slag and heat losses with the slag melt during its discharge from the furnace. For the CaO-Al2O3-CaF2 system, according to the calculations of the activation energy, the rational content of the components CaO = 40-50%, Al2O3 = 35-45%, CaF2 5-20% was established, which ensures the homogeneity of their melts at temperatures above 1600 °C. For the ESR process, a rational slag composition is recommended: 31% -CaF2; 31% -Al2O3; 31% -CaO with a SiO2 content of 2.5 ÷ 4% wt., and MgO - 3% wt. which, unlike others, has a long temperature range of 1240-1500 °C with optimal values of viscosity (0.02-0.09 Pa ∙ s) and electrical conductivity (100-240 1 / (Ω ∙ m)). Product Description popup.authors Bielkova Alla I. Boldenko Mykhailo H Harmash Larysa I. Herasymenko Viktor H. Holovko Liudmyla A. Gorbatenko Nataliya V. Grekov Stanislav V. Kuksa Oleh V. Likhachov Yurii М. Lopatenko Kostiantyn P. Nesterov Oleksandr S. Piptiuk Vitalii P. Petrov Oleksandr P. Skachko Oleksandr S. Snihura Iryna R. Stepanenko Dmytro О. Tohobytska Daria M. Khodotova Nadiia Е. Tsiupa Natalia O. Shevchenko Valentyna М. popup.nrat_date 2021-01-12 Close