Lithuanian Journal of Physics article / Lietuvos fizikos žurnalo straipsnis

CALCULATION OF ACTIVATION ENERGY OF VISCOSITY FOR EVALUATION OF METALLURGICAL SLAG MELTS STRUCTURE
Dmytro Stepanenko
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: d.gorodenskiy@gmail.com

Received 9 February 2023; revised 12 February 2023; accepted 15 February 2023

Measurements of metallurgical slag viscosity were performed. The studied slags have been found to have close viscosity (η) values over a wide temperature range from 1453 to 1873 K. The results demonstrate that the viscosity decreases with the increase of CaO/SiO₂ ratio. Temperature inflection points (T’) are found in the η = f(T) dependence, and they are consistent with the chemical composition of slags below 1453 K. The value of T’ increases with the increase of CaO/SiO₂ ratio. The activation energy of viscosity E_η was calculated by using the Frenkel equation. With the increase of temperature, E_η decreases and does not depend on the chemical composition of slags. In the temperature region from 1473 to 1573 K, the temperature dependence of E_η = f(T) demonstrates energy deviations from the trend line indicating the relaxation of structurally sensitive bonds. The results obtained are of practical importance for the selection of rational slags for different metallurgical processes.
Keywords: slag, viscosity, activation energy, structure

KLAMPUMO AKTYVACIJOS ENERGIJOS SKAIČIAVIMAS METALURGINIO ŠLAKO LYDALŲ STRUKTŪRAI ĮVERTINTI
Dmytro Stepanenko

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

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