CFD modeling of carbon combustion and electrode radiation in an electric arc furnace

Yiğit, Cemil; Büyükkaya, Ekrem; Durmaz, Ufuk; Güven, Hasan Rıza

doi:10.1016/j.applthermaleng.2015.07.066

Cited by 32 publications

(12 citation statements)

References 13 publications

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“…Due to the complexity of the plasma arc, the interfacial heat transfer from the plasma arc to the molten bath is simplified as an equivalent heat source. For example, a constant heat flux is applied at the bottom surface of the electrodes to simulate the change in electricity, as reported by Yigit et al [8] In addition, the channel arc model (CAM) is widely used to estimate the arc energy dissipation. [9][10][11][12] Compared with the magneto-fluid dynamic (MFD) model, which computes velocity and temperature profiles in the arc region, the simplified CAM just focuses on the arc temperature and instantaneous power.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Fluid Flow and Heat Transfer by Means of a Unified Model in a Direct Current Electric Arc Furnace

Yao

Zhu

Pan

2021

steel research int.

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Herein, a unified 2D axially symmetric model coupling the plasma arc and molten bath in a direct current electric arc furnace is established, with the physical phenomena at the plasma arc/molten bath interface to be confronted by the “local thermodynamic equilibrium diffusion approximation” method. After ensuring model validation and grid independence test, the fluid flow and heat transfer processes are analyzed. The numerical investigation reveals that in terms of the relative importance of driving forces in the molten bath, an anticlockwise eddy is formed at the molten bath center driven by electromagnetic force, whereas a clockwise eddy is formed near the lateral part of the molten bath driven by buoyancy force. Regarding the distribution of heat ﬂux, the convection–conduction and radiation heat govern the rate of heat transfer from the plasma arc to the molten bath. In addition, for larger arc current, higher arc power in the plasma arc region and higher heating rates in the molten bath are obtained when the arc length is held constant; for shorter arc length, lower arc power in the plasma arc region but higher heat transfer efficiency in the molten bath is attained when the arc current is held constant.

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Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Fluid Flow and Heat Transfer by Means of a Unified Model in a Direct Current Electric Arc Furnace

Yao

Zhu

Pan

2021

steel research int.

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“…Sanchez et al 14) developed a radiation model for predicting hot spots formation for an industrial EAF with long arc operation of 45 cm. Yigit et al 15) developed a 3D CFD model predicting temperature distributions of the inclusion of combustion reactions and radiation interactions inside the EAF.…”

Section: Introductionmentioning

confidence: 99%

Computational Simulation Model for Metallurgical Effects during EAF Refining Stage: Waiting and Arcing Time

Elkoumy¹,

El-Anwar

Fathy³

et al. 2018

ISIJ International

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3D computational fluid dynamics models using Fluent were developed to investigate the steel melt flow during waiting and arcing time. Both models were transient that analyzed 60 seconds to investigate the flow characteristics considering variation in steel melt thermo-physical parameters and operating conditions. The velocity of melt movement was high enough to make a turbulent flow (solved with realize k-ε turbulence model). It was found that the steel melt flow velocity increases by a combined effect of the steel melt temperature and composition, and slag pressure. The slag pressure increases by a double effect of slag density and height, and the steel melt fluid flow velocity changes with the slag pressure. The effect of the slag thickness is more significant than the effect of thermo-physical properties of steel melt. Although, the maximum steel melt velocity "during arcing time" may be as large as 0.67 m/s located at steel met outlet, the melt exhibits completely dead zones with minimum flow velocity distribution especially at the bottom and circumference areas. This indicates the importance of combined stirring and large reaction rates to achieve a complete homogeneous melt especially at bottom and circumference areas.

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“…Recently, the temperature distribution of the molten bath was studied by Yigit. 15) In summary, the effects of the number and position of nozzles on the flow characteristic of fluid are the focus of published articles. However, few researchers have analyzed the effects of different bottom-blowing gas flow rate distributions on fluid flow in an eccentric bottom-tapping (abbreviated to "EBT") EAF and the injection mechanism of bottom-blowing in EAF steelmaking.…”

Section: Fluid Flow Characteristic Of Eaf Molten Steel With Differentmentioning

confidence: 99%

“…(14) can be converted into Eq. (15). 15Theoretically, the carbon-oxygen equilibrium is constant owing to the stable temperature in the EAF steelmaking process.…”

Section: Industrial Experiments Validationmentioning

confidence: 99%

Fluid Flow Characteristic of EAF Molten Steel with Different Bottom-Blowing Gas Flow Rate Distributions

Yang

Cheng

et al. 2020

ISIJ Int.

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CFD modeling of carbon combustion and electrode radiation in an electric arc furnace

Cited by 32 publications

References 13 publications

Numerical Analysis of Fluid Flow and Heat Transfer by Means of a Unified Model in a Direct Current Electric Arc Furnace

Numerical Analysis of Fluid Flow and Heat Transfer by Means of a Unified Model in a Direct Current Electric Arc Furnace

Computational Simulation Model for Metallurgical Effects during EAF Refining Stage: Waiting and Arcing Time

Fluid Flow Characteristic of EAF Molten Steel with Different Bottom-Blowing Gas Flow Rate Distributions

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