Studying the impact of the operating modes of the ladle furnace installation on the harmonic composition of electric arc currents

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The article is aimed at improving the energy efficiency of electric steel melting complexes by optimizing the control algorithms in ladle-furnace (LF) installations. The set of conducted research revealed the mechanism of the impact of technology factors on the harmonic composition of arc currents. Therefore, the article evaluates the im-pact of slag layer thickness and peculiar features of liquid metal distribution under the influence of argon purging. The research findings show that stable electric arching is ensured by a sufficient slag layer, which prevents overheating of the lining, steel ladle and vault, as well as reduces heat energy losses. The authors develop advanced algorithms for the automatic control of electrical LF modes, which allow correcting the arc length and working voltage depending on the current arching conditions. The use of the developed algorithm improves arching stability, increases the overall efficiency, and reduces specific power consumption. The practical significance of the work consists in the wide applicability of the developed technical solutions at iron works with electric steel melting and converter shops exploiting high-power LFs.

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Ladle furnace, argon blowing, electric arcs, harmonic composition of currents, thermal efficiency, control of electrical modes, slag mode

Короткий адрес: https://sciup.org/147252018

IDR: 147252018   |   УДК: 621.365.22   |   DOI: 10.14529/power250306