Method of Switching Point Determination for Control System of Electric Arc Furnace Based on Data about Harmonics of Arc Currents and Voltages

Николаев, А. А.; Tulupov, P. G.; Agapitov, E. B.

doi:10.1109/icieam48468.2020.9112001

Cited by 7 publications

(4 citation statements)

References 6 publications

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“…To accurately convert the coil‐induced electromotive force output of the Rogowski coil into the measured alternating current, [ 37,38 ] an inverting integrator circuit is necessary. Additionally, an amplifier circuit is required before the integrator amplifies the induced voltage of the Rogowski coil.…”

Section: Methodsmentioning

confidence: 99%

“…As the measured current flows through the center of the Rogowski coil along the axis, a varying magnetic field is generated within the loop winding. [36] To accurately convert the coil-induced electromotive force output of the Rogowski coil into the measured alternating current, [37,38] an inverting integrator circuit is necessary. Additionally, an amplifier circuit is required before the integrator amplifies the induced voltage of the Rogowski coil.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

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Effect of Argon Flow Rate on Power Consumption of a 120‐t Ladle Furnace

Song,

Zhang,

Yin

et al. 2024

steel research int.

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To improve the phenomenon of serious power consumption of a ladle furnace, the impact of argon flow rate on power consumption in the refining process is investigated through theoretical calculations based on the principle of alternating current measurement using Rogowski coil and integrator circuit. The study divides the power supply phase into four distinct flow rate regions in a single furnace of DH36 steel, a low‐alloy, high‐strength ship plate steel commonly used in shipbuilding and offshore platforms. The analysis of active power, current, and voltage trends, along with average power consumption per second at each flow rate region, reveals a potential for efficient reduction in power consumption. Additionally, experiments with different argon flow rates (300, 400, and 500 NL min−1) during the power supply stages of multifurnace argon tests of AB/A steel show improvements in desulfurization rate, heating rate, processing time, and power consumption per ton of steel heated by 1 °C and power consumption per ton of steel per second.

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Section: Methodsmentioning

confidence: 99%

Section: Theoretical Backgroundmentioning

confidence: 99%

Effect of Argon Flow Rate on Power Consumption of a 120‐t Ladle Furnace

Song,

Zhang,

Yin

et al. 2024

steel research int.

View full text Add to dashboard Cite

show abstract

“…To validate the new proposed process stability index in the EAF, the results obtained were compared with three different established methods of process stability analysis used by other authors [5,[25][26][27] from the analysis of voltage and current signals.…”

Section: Industrial Validation Of the Proposalmentioning

confidence: 99%

New Arc Stability Index for Industrial AC Three-Phase Electric Arc Furnaces Based on Acoustic Signals

Guerra-Serrano

Roca

González-Yero

et al. 2020

Sensors

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This research proposes a new index to evaluate the stability of the melting process, in three-phase electric arc furnaces (EAFs), based on the acoustic signals generated during the different stages of the casting. The proposed stability index is obtained by characterizing the time and frequency domain of the acoustic signals. During EAF monitoring, acoustic signals were acquired using a microphone coupled to an NI USB-9234 acquisition system. To validate the results, the voltage and current signals were measured with the aid of a Circutor AR6 power analyzer for three-phase electrical networks. The results showed that the acoustic signal energy in the frequency range of 1 to 12 kHz can be used as an indicator of the process stability in the EAF. Finally, the validity of the proposed stability index is evaluated from the process characterization using the harmonic distortion analysis methods and the dynamic U-I characteristics of the arc voltage and current signals. The results obtained demonstrated the effectiveness of the proposal and constitute a starting point for advances in the automatic control of the process in the EAF, from the acoustic signals.

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“…At Russian plants, the scrap low quality determines technological errors that lead to re-oxidation of the melt during the smelting of the semi-product in EAF and the need for increased ferroalloys consumption for steel deoxidation in the ladle-furnace unit (LF). A lot of works are devoted to the optimization of the EAF electrical mode and it's control [1][2][3][4][5][6][7][8], there are less works on the topic of the slag mode [9][10][11][12] and the burners and injectors operation [13,14]. Such a number of works devoted to the EAF electrical mode shows the relevance of this direction.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Assessment of the Technogenic Raw Materials Briquettes Effect on the Arc Furnace Electric Mode

Egiazar’yan¹,

Сивцов²,

Tsimbalist³

2022

MSF

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The influence of partially reduced scale briquettes on the arc electrical characteristics in a laboratory single-phase arc furnace is considered. Briquettes were obtained from industrial scale by mixing it with coke production waste and flux-forming additives. Fluxes were selected with aim that their interaction provided the slag homogeneity. During the experiment, the conditions for entering a briquette into an electric arc furnace (EAF) were simulated. That includes imitation of simultaneous melting of briquettes and scrap and the formation of a slag cover (metal was melted, briquette was added, slag was introduced), and imitation adding briquettes to a liquid bath of metal with slag (metal was melted, slag was introduced, briquette was added). A slightly positive effect of the briquettes input on the arc burning conditions was noted, as well as a noticeable effect of slag foaming. It is assumed that a significant content of iron oxides in the briquette will also contribute to the lime accelerated assimilation in the slag, which may somewhat speed up the process of metal refining from phosphorus.

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Method of Switching Point Determination for Control System of Electric Arc Furnace Based on Data about Harmonics of Arc Currents and Voltages

Cited by 7 publications

References 6 publications

Effect of Argon Flow Rate on Power Consumption of a 120‐t Ladle Furnace

Effect of Argon Flow Rate on Power Consumption of a 120‐t Ladle Furnace

New Arc Stability Index for Industrial AC Three-Phase Electric Arc Furnaces Based on Acoustic Signals

Laboratory Assessment of the Technogenic Raw Materials Briquettes Effect on the Arc Furnace Electric Mode

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