DOI: 10.52150/2522-9117-2022-36-172-181

Yelisieiev Volodymyr Ivanovych, Ph. D. (Pys.-Math.), Senior Researcher, Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, Ukraine, 49107. ORCID: 0000-0003-4999-8142

Manachyn Ivan 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, Ukraine, 49107. ORCID: 0000-0001-9795-6751

Shevchenko Anatolii Pylypovych, D. Sc. (Tech.), Professor, Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, Ukraine, 49107. ORCID: 0000-0003-0867-6825. E-mail: ovoch-isi@outlook.com

Shevchenko Serhiy Anatoliyovych, Ph. D. (Tech.), Senior Researcher, Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, Ukraine, 49107. ORCID: 0000-0003-1521-9665

ESTIMATION OF THE PARAMETERS OF THE IMMERSION OF REAGENT PARTICLES WITH GAS INTO THE MELT DURING INJECTION OUT-OF-FURNACE DESULFURIZATION OF CAST IRON

Summary. The aim of the work is to develop a mathematical model for estimating the immersion of reagent particles with gas in molten iron during desulfurization. The technologies of out-of-furnace injection ladle desulfurization of cast iron are based on the introduction of reagent particles into liquid cast iron with the help of high-speed gas jets. The patterns of behavior and interactions of two-phase jets (carrying gas+reagent) with cast iron melt are complex, as the individual dynamic characteristics of individual particles are lost. Also important is the question of the ratio of the number of particles that went deep into the metal and the particles that ended up in the floating bubble. In the work, a number of experimental studies were performed to evaluate the factors and parameters of the immersion of the reagent particle during ladle desulfurization of cast iron. Experiments have shown that the depth of immersion of a reagent particle with a radius of 0.5 mm in the presence of a cavern depends on the velocity of the particle. For an initial speed of 20 m/s, the length of the cavern is about 6 gauges, and for a speed of 140 m/s – about 10 gauges. However, as it follows from the calculations, the velocities of the reactant particles drop rapidly, which should lead to a change in the flow structure and the emergence of caverns. In this case, capillary forces will play a significant role in the penetration of the reagent into the melt. In the developed model, they are taken into account as an additional factor. It is shown that these effects have a rather weak character compared to the repulsive force of Archimedes.

Key words: desulfurization, injection, cast iron, ladle, reagent, particle, immersion.

DOI: https://doi.org/10.52150/2522-9117-2022-36-172-181

For citation: Yelisieiev V. I., Manachyn I. O., Shevchenko A. P., Shevchenko S. A. Otsinka parametriv zanurennia chastynok reahentu z hazom u rozplav pry inzhektsiinii pozapichnii desulfuratsii chavunu [Estimation of the parameters of the immersion of reagent particles with gas into the melt during injection out-of-furnace desulfurization of cast iron]. Fundamental and applied problems of ferrous metallurgy. 2022. Collection 36. P. 172-181. [In Ukrainian]. https://doi.org/10.52150/2522-9117-2022-36-172-181

References

1. Shevchenko, F., Bolshakov, V. I., & Bashmakov, A. M. (2011). Tehnologiya i oborudovanie desulfuracii chuguna magniem v bolshegruznyh kovshah. Naukova dumka
2. Shevchenko, F. et al. (2017). Vnepechnaya desulfuraciya chuguna v kovshah. Tehnologiya, issledovaniya, analiz, sovershenstvovanie. Dnipro- VAL
3. Konstantinov, G. (2018). Numerical modeling of a solid sphere free fall into the water. Trudy MAI, 101. https://trudymai.ru/published.php?ID=96562
4. Tyatyushkina, S. (2019). Issledovanie parametrov kaverny na poverhnosti vody pri padenii tela. Informatika i upravlenie v tehnicheskih i socialnyh sistemah. Trudy NGTU im. R.E. Alekseeva, (2), 79-88
5. Sagomonyan, Ya. (1974). Pronikanie. Izd-vo moskovskogo universiteta
6. Logvinovich, V. (1969). Gidrodinamika techenij so svobodnymi granicami. Naukova dumka
7. Lojcyanskij, G. (2003). Mehanika zhidkosti i gaza. DROFA. 2003
8. Shlihting, (1969). Teoriya pogranichnogo sloya. Nauka
9. Fedorov, V., & Veldanov, V. A. (2013). K opredeleniyu kavitacionnoj polosti v vode za dvizhushimsya s vysokoj skorostyu cilindricheskim telom. Zhurnal tehnicheskoj fiziki, 83(2), 15-20
10. Shevchenko, A., Shevchenko, A. F., & Eliseev, V. I. (2008). Zakonomernosti vnedreniya chastic magniya v rasplav chuguna pri vduvanii cherez furmu bez isparitelnoj kamery na vyhode. Sb. nauchn. Tr. IChM Fundamentalnye i prikladnye problemy chernoj metallurgii, 17, 111-115
11. Voronova, N. A. (1980). Desulfuraciya chuguna magniem. Metallurgiya