Reduced 2D/1D mathematical models for analyzing inductive effects in submerged arc furnaces

Fromreide, Mads; Gómez, Dolores; Halvorsen, Svenn Anton; Herland, Egil V.; Salgado, Pilar

doi:10.1016/j.apm.2021.04.034

Cited by 9 publications

(1 citation statement)

References 10 publications

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“…[4][5][6][7][8] Most published studies for this pilot furnace use alternating currents, while we have assumed direct current. This approximation is valid for small furnaces, 32,33 which is consistent with an experimental ratio of active to apparent power (cos /) close to one. 7,8 For simplicity, the calculation of the electrical conditions is restricted to the electrodes and charge domains.…”

Section: Electrostaticssupporting

confidence: 84%

An Overall Furnace Model for the Silicomanganese Process

Sparta

Risinggård

Einarsrud

et al. 2021

JOM

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Controlling and optimizing smelting processes in submerged-arc furnaces are complicated by the limited amount of information available regarding the internal conditions. Computer models can help to bridge this knowledge gap. Due to the process complexity, computer models are commonly restricted to electrical conditions, thermal conditions, or chemical reactions, for instance. We have developed an overall model for a pilot-scale silicomanganese furnace that simultaneously considers electrical and thermal conditions, process chemistry, and flow of solid and liquid substances. To the best of our knowledge, this is the first comprehensive silicomanganese furnace model. The model has been compared to experimental data. Using information about the inner state of the furnace provided by the model, we are able to predict and explain an increase in temperature during over-coking as well as changes in the product compositions.

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Section: Electrostaticssupporting

confidence: 84%

An Overall Furnace Model for the Silicomanganese Process

Sparta

Risinggård

Einarsrud

et al. 2021

JOM

Self Cite

View full text Add to dashboard Cite

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Mathematical Models for Electromagnetic Conditions in Submerged Arc Furnaces

Halvorsen

Fromreide

Sparta

et al. 2022

Mathematics in Industry

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Understanding Scale-Up of High-Current Electrodes

Halvorsen

Herland

Sparta

et al. 2023

Metall Mater Trans B

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A simple and generic model for the heat distribution in electrodes for primary metal production has been investigated. The equations have been analyzed focusing on understanding the scale-up of electrodes under both direct current (DC) and alternating current (AC) conditions. The analysis provides a theoretical foundation for Westly’s empirical scale-up rule. For graphite and small carbon electrodes, the current-carrying capacity is limited by the ohmic heating, which controls the lateral heat flux and the temperature at the electrode periphery. For these electrodes, the current capacity is higher for DC than for AC. For large carbon or Søderberg electrodes, the electrode current must be limited to avoid large thermal stresses and subsequent breakages, especially in connection with shutdowns or considerable current fluctuations. Thermally, the current capacity is then limited by the maximum temperature difference between the center and the periphery. For this case, AC electrodes can carry more current than DC.

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Reduced 2D/1D mathematical models for analyzing inductive effects in submerged arc furnaces

Cited by 9 publications

References 10 publications

An Overall Furnace Model for the Silicomanganese Process

An Overall Furnace Model for the Silicomanganese Process

Mathematical Models for Electromagnetic Conditions in Submerged Arc Furnaces

Understanding Scale-Up of High-Current Electrodes

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