DOI: 10.52150/2522-9117-2023-37-260-270

Stepanenko Dmytro Oleksandrovych, Ph. D. (Tech.), Senior Researcher, Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, 49107, Ukraine. ORCID: 0000-0001-5913-2284

Grishin Oleksandr Mykhailovych, Ph. D. (Tech.), Senior Researcher,Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, 49107, Ukraine. ORCID:  0009-0000-0665-1179. E-mail: hryshyn@i.ua

Belkova Alla Ivanivna, Ph. D. (Tech.), Senior Researcher, Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, 49107, Ukraine. ORCID: 0000-0001-8519-9351. E-mail: iro4ka01091990@gmail.com

ANALITICAL AND EXPERIMENTAL STUDIES OF PROPERTIES OF SLAG AND SLAG-FORMING MIXTURES OF STEEL MAKING PRODUCTION

Abstract. The aim of the study is to analyze and generalize the properties of slags within the CaO-SiO₂-Al₂O₃-MgO-CaF₂ system in different ratios of components and their concentrations, which is the basis of refining slags in modern steelmaking. To ensure the technological functions, the slag melt should have a set of optimal values of physical and chemical properties, in particular: viscosity, surface tension, electrical conductivity, melting temperature (beginning and end), enthalpy, density and others, which significantly affect the kinetics of heat and mass transfer processes in the “metal-slag” system. The information resource of researches is provided by own experimental data and data of databases “Slag” and “SFM” containing information about technological properties of melts of slag and oxide systems. The analysis of the data on the dependence of the properties of oxide systems on their chemical composition and temperature was performed. Oxide systems within the chemical composition CaO-SiO₂-Al₂O₃-MgO-CaF₂ are considered. The connection of the chemical composition of slag systems with the properties of their melts from the point of view of the concept of directed chemical bonding using integral parameters is established: ρ is the stoichiometry index; ∆e is the average number of electrons localized in the direction of the cation-anion (K-A) bond; d is the average inter-nuclear distance K-A; tgα is the change in the electron density in the direction of the K-A bond; Z_A(A-A), Z_K(K-A), Z_K(K-K) are the weighted average values of cation and anion charges in the A-A, K-A, K-K bonds. Based on the results of experimental and analytical studies, predictive models of the properties of the considered oxide systems were obtained, namely for the calculation of viscosity, electrical conductivity, crystallization temperature and density of slag melts in the range of their temperatures from 1200°C to 1800°C. The presented method of predicting the properties of refining slags can be used to evaluate the use of slags of different composition in the ladle, for example, in ladle-furnace installations.

Key words: slag, properties, chemical composition, temperature, dependence.

DOI: https://doi.org/10.52150/2522-9117-2023-37-260-270

For citation: Stepanenko, D. O., Grishin, O. M., & Belkova, A. I. (2023). Analitical and experimental studies of properties of slag and slag-forming mixtures of steelmaking production. Fundamental and applied problems of ferrous metallurgy, 37, 260-270. https://doi.org/10.52150/2522-9117-2023-37-260-270

References

1. Prykhodʹko, E. V., Tohobytsʹka, D. M., Khamkhotʹko, O. F., & Stepanenko, D. O. (2013). Prohnozuvannya fizyko-khimichnykh vlastyvostey oksydnykh system. Porohy
2. Prykhodʹko, E. V (1995). Metalokhimiya bahatokomponentnykh system. Metalurhiya
3. Povolotsʹkyy, D. Ya., Mishchenko, V. Ya., Vyatkin, H. P. et al. (1970). Fizyko-khimichni vlastyvosti rozplaviv systemy SaO – Al203 – CaF2. Visti VNZ Chorna metalurhiya, 12, 8 – 11
4. Kulikov, I. S. (Ed.) Atlas shlakiv. Sprav. vyd. (1985). Metalurhiya
5. Akberdin, A. A., Kulykov, I. S., Kim, V. A. et al. (1987). Fizychni vlastyvosti rozplaviv CaO-SiO₂-Al₂O₃-MgO-CaF₂. Metalurhiya
6. Stepanenko, D. A., Tohobytsʹka, D. M., Khamkhotʹko, O. F., & Baumer, V. N. (2012).Vyvchennya mikroheterohennosti rozplaviv domennykh shlakiv na osnovi doslidzhennya yikh fazovoho skladu. Metal ta lyttya Ukrayiny,1(224), 35-38
7. Matvyeyev, M. A., Matvyeyev, H. M., & Frenkelʹ, B. N. (1972). Rozrakhunky z khimiyi ta tekhnolohiyi skla. Derzhbud yzdat
8. Popelʹ, S. I. (1964). Fizyko-khimichni zasady metalurhiynykh protsesiv. Metalurhiya
9. Sokolov, V. I., Popelʹ, S. I., & Yesin, O. A. (1970). Shchilʹnistʹ ta molyarnyy obsyah shlakiv. Yzvestyya vuziv. Chorna metalurhiya, 2, 10-15
10. Musykhin, V. I., Lepinsʹkykh, B. M., Chernyayev, V. H. et al. (1969). Vplyv oksydiv zaliza, khromu ta vanadiyu na poverkhnevyy natyah ta shchilʹnistʹ rozplaviv systemy CaO-SiO₂-Al₂O₃-MgO. Fizychna khimiya metalurhiynykh rozplaviv. AN SRSR, 20, 85-87
11. Deryabin, A. A., Popelʹ, S. I., & Zupnyk, A. Ye. (1968). Adheziya oksydiv z tekhnichnymy splavamy ta stalyamy. Yzvestyya AN SRSR. Metaly, 2, 78-79
12. Toropov, N. A., & Boryantsev, B. A. (1965). Fizyko-khimichni vlastyvosti ta krystalizatsiya rozplaviv systemy okys mahniyu-zakys zaliza-kremnezem. Strukturni peretvorennya u skli pry pidvyshchenni temperatury. Nauka, 205-232
13. Komelʹkov, V. K. (1974). Rozrobka, doslidzhennya ta vprovadzhennya novykh syntetychnykh shlakiv dlya rafinuvannya staly. Avtoref. dys. kand. tekhn. nauk. Modkva, TSNDIChermet
14. Zhmoydin, H. I, Sokolov, V. I., & Pidhornov, H. V. et al. (1975). Shchilʹnistʹ ftorydnykh rozplaviv. Teoriya metalurhiynykh protsesiv, 3, 15-157
15. Edneral, F. P., Smolyarenko, V. D., & Yakushev, A. M. (1967). Doslidzhennya vlastyvostey shlakiv, pryznachenykh dlya obrobky metalu v kovshi. Vyrobnytstvo stali ta stalevoho lyttya: Tr. Moskovsʹkyy vechirniy metalurhiynyy instytut., 5, 153-184