[PDF]    https://doi.org/10.3952/physics.2024.64.1.6

Open access article / Atviros prieigos straipsnis
Lith. J. Phys. 64, 58–71 (2024)

NEW APPROACH TO EVALUATING THE THERMODYNAMIC CONSISTENCY OF MELTS IN THE ‘METAL–SLAG’ SYSTEM BASED ON INTERATOMIC INTERACTION PARAMETERS
Daria Togobitska and Alla Belkova
Department of Physical and Chemical Problems of Metallurgical Processes, Z.I. Nekrasov Iron and Steel Institute of NAS of Ukraine,
1 Academician Starodubov Square, 49107 Dnipro, Ukraine
Email: alla2904b8@gmail.com

Received 11 May 2023; revised 31 July 2023; accepted 4 August 2023

The article presents a new approach to evaluating the thermodynamic state of the ‘metal–slag’system during metal smelting in oxidizing-reducing conditions. The interaction between the metal and slag is analyzed using the model of the structure of metallurgical melts, which considers cooperative ion exchange processes and interatomic interaction parameters.As a result of analyzing experimental data on the compositions of reacting melts during pig iron and steel smelting, criteria were developed for assessing the degree of achieving the equilibrium in the system regarding sulfur. The charge state parameters of the metallic system ZY and the slag system Δe, the slag stoichiometry index ρ, and the charge state parameter of the melt components Zi were used. The regularity of a consistent formation of metallic and slag melts has been established, which is evidenced by a significant correlation between the chemical equivalent of the metal composition ZY and the slag Δe. Analytical dependences were obtained in the form of ZY = fe,ρ). The identified patterns and criteria can be integrated into automated process control systems for regulating the slag regime and producing high-quality pig iron and steel.
Keywords: ‘metal–slag’ system, interatomic interaction parameters, charge state of the system, sulfur equilibrium, thermodynamic consistency of melts


NAUJAS BŪDAS ĮVERTINTI LYDALŲ TERMODINAMINĘ DERMĘ METALO IR ŠLAKO SISTEMOJE, NAUDOJANT TARPATOMINĖS SĄVEIKOS PARAMETRUS
Daria Togobitska, Alla Belkova

  Ukrainos nacionalinės mokslų akademijos Z. I. Nekrasovo geležies ir plieno institutas, Dnipras, Ukraina


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