Investigating cavity formation in an electric arc zone during out-of-furnace processing of steel

Authors

DOI:

https://doi.org/10.15587/1729-4061.2023.284884

Keywords:

physical modeling, «ladle-furnace» installation, graphitized hollow electrode, geometric parameters of the cavity

Abstract

The object of this study is the interaction zone between a graphitized hollow electrode (GHE) and a metal bath on the «ladle-furnace» installation.

The regularities of the formation of the geometric parameters of the hole were established for the purpose of further evaluation of the heat exchange under the electrode in the arc combustion zone under different operating conditions of the «ladle-furnace» installation.

An experimental methodology was devised, and a laboratory setup was built for physical simulation on a cold model. The values of the geometric parameters of the cavity formed by the electric arc discharge in the sub-electrode zone were calculated. In particular, the area of the curved surface of the cavity is about 0.2 m2 at a depth of 40 mm. The regularities of formation of the geometry of the cavity during gas injection through the GHE channel have been established, in particular with regard to the area and depth of the cavity. Thus, with a gas consumption of 3–20 m3/h and a slag cover height of 100 mm, the area reaches 0.28–0.5 m2, while the depth of the cavity ranged from 5 cm to 19 cm, respectively. Rational flow rates of gas supplied through the channel of the graphitized hollow electrode were established, which for a slag cover of 100 mm are 3–6 m3/h and for a slag cover of 200 mm – 6–10 m3/h.

The peculiarities of the formation of a metal cavity in the sub-electrode zone under the conditions of gas supply through the channel of a graphitized hollow electrode during out-of-furnace processing of steel at the «ladle-furnace» installation were investigated.

The patterns of the formation of the geometry of the cavity in the arc combustion zone, which were obtained using cold modeling, could subsequently make it possible to perform calculations of heat transfer from the electric arc discharge to the metal bath. That will also make it possible to determine the share of heat absorbed by slag and metal under the conditions of using a conventional electrode, and a hollow one with gas supply through its channel during out-of-furnace processing of steel at the «ladle-furnace» installation

Author Biographies

Volodymyr Ruban, Ukrainian State University of Science and Technologies

Postgraduate Student

Department of Iron and Steel Metallurgy

Oleksandr Stoianov, Ukrainian State University of Science and Technologies

PhD, Associate Professor

Department of Iron and Steel Metallurgy

Kostiantyn Niziaiev, Ukrainian State University of Science and Technologies

Doctor of Technical Sciences, Professor

Department of Iron and Steel Metallurgy

Yevhen Synehin, Limited Liability Company "Technical University "Metinvest Polytechnic"

PhD, Associate Professor

Department of Metallurgy, Materials Science and Production Organization

Svitlana Zhuravlova, Ukrainian State University of Science and Technologies

PhD, Associate Professor

Department of Iron and Steel Metallurgy

Khrystyna Malii, Limited Liability Company "Technical University "Metinvest Polytechnic"

PhD

Department of Metallurgy, Materials Science and Production Organization

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Investigating cavity formation in an electric arc zone during out-of-furnace processing of steel

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Published

2023-08-31

How to Cite

Ruban, V., Stoianov, O., Niziaiev, K., Synehin, Y., Zhuravlova, S., & Malii, K. (2023). Investigating cavity formation in an electric arc zone during out-of-furnace processing of steel . Eastern-European Journal of Enterprise Technologies, 4(1 (124), 134–142. https://doi.org/10.15587/1729-4061.2023.284884

Issue

Vol. 4 No. 1 (124) (2023): Engineering technological systems

Section

Engineering technological systems

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Copyright (c) 2023 Volodymyr Ruban, Oleksandr Stoianov, Kostiantyn Niziaiev, Yevhen Synehin, Svitlana Zhuravlova, Khrystyna Malii

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