Numerical Simulation of Fluid Flow, Heat Transfer, Species Transfer, and Solidification in Billet Continuous Casting Mold with M-EMS

Zhang, Wenjie; Luo, Shaohua; Chen, Yao; Wang, Weiling; Zhu, Miaoyong

doi:10.3390/met9010066

Cited by 39 publications

(31 citation statements)

References 29 publications

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“…In a study by Zhang et al [3], a 3-D multi-physical numerical model was developed to predict the macro transport phenomena in a continuous casting mold while being subject to an electromagnetic (EM) field. The model described in the study is based on the ANSYS commercial software package and was formulated to investigate the effect of current intensity (0, 150, 200, and 240 A) on the heat, momentum, and species transport in a 160 × 160 mm billet.…”

Section: Contributions To the Special Issuementioning

confidence: 99%

Optimization of Industrial Casting Processes

Cockcroft

2020

Metals

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Section: Contributions To the Special Issuementioning

confidence: 99%

Optimization of Industrial Casting Processes

Cockcroft

2020

Metals

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“…Останнім об'єктом моделювання був кристалізаторі МБЛЗ для розливання сортової заготовки діаметром 160 мм. Згідно з даними комп'ютерного моделювання [18] електромагнітна мішалка MEMS, яка працює із силою струму 200 А та частотою 4 Гц, генерує в рідкому ядрі заготовки горизонтальний вихор із максимальною швидкістю обертання 0,27 м/с та глибиною близько 1,3 м. При розрахунку враховували постійний ріст кірки, тому середній діаметр вихору приймали близько 130 м.…”

Section: результати дослідженняunclassified

Assessment of the efficiency of non-metallic inclusions removal through the use of centrifugal force at different stages of steel production

Synehin¹,

Sukhovetskyi²,

Молчанов³

et al. 2020

MPM

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Methods for the removal of non-metallic inclusions from steel at various stages of its production are considered: in a teeming ladle, a tundish and a CCM mold. It is proposed to classify methods of non-metallic inclusions removal into two groups: mechanical (inert gas blowing, application of electromagnetic stirrers, etc.) and physical and chemical (modification of non-metallic inclusions, slag treatment, rational deoxidation modes). Particular attention is paid to methods aimed at creating a vortex in the metal, inside which non-metallic inclusions are transported to its axis. The aim of the work is to determine the efficiency of use centrifugal forces to remove non-metallic inclusions at different stages of steel production. To assess the centrifugal force effectiveness, it has been analyzed the transfer time of non-metallic inclusions of various sizes to the vortex axis in the teeming ladle of 50 tons capacity, a rotary chamber of tundish (chamber capacity is 2.0 tons) and the CCM mold of 160 mm in diameter. For typical angular velocities being observed during electromagnetic stirring, the values of the metal inertia moment and the kinetic energy of its rotational motion have been calculated. According to the calculations, the smallest transfer time of inclusions is achieved in the teeming ladle. However, vortex creation in it requires a significant energy. The use of centrifugal force in the mold, although it does not require such a high energy, is also not efficient enough due to the low angular velocity of the vortex, limited by a risk of violating the crust formation in the mold. The possibility of using the kinetic energy of the jet flowing from the teeming ladle to the rotary chamber of the tundish has been assessed.

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“…Because the electromagnetic field period is far shorter than the momentum response time of molten steel, the time-average induced electromagnetic volume force could be used to couple with the flow field. It can be defined as [27]: ; and Re denotes the real part of the complex quantity.…”

Section: Electromagnetic Modelmentioning

confidence: 99%

Influence of EMS on Asymmetric Flow with Different SEN Clogging Rates in a Slab Continuous Casting Mold

Zhong

et al. 2019

Metals

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Submerged entry nozzle (SEN) clogging is a troublesome phenomenon in the continuous casting process that can induce the asymmetric mold flow, and thus, lowering the steel product quality. In this paper, a mathematical model coupling the electromagnetic and flow fields, was developed to investigate the influence of the SEN clogging rate on the flow field and the influence of electromagnetic stirring (EMS) on the asymmetric mold flow. Slag entrapment index Rc was introduced to quantify the possibility of slag entrapment, and symmetric index S was introduced to quantify the symmetry of the flow field. The results show that as the SEN clogging rate increased, the slag entrapment index Rc increased, while the symmetric index S decreased. EMS can greatly improve the symmetry of the flow field with SEN clogging, but it cannot remove the asymmetric phenomenon completely because the stirring intensity should be controlled below the safe level to avoid slag entrapment.

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Numerical Simulation of Fluid Flow, Heat Transfer, Species Transfer, and Solidification in Billet Continuous Casting Mold with M-EMS

Cited by 39 publications

References 29 publications

Optimization of Industrial Casting Processes

Optimization of Industrial Casting Processes

Assessment of the efficiency of non-metallic inclusions removal through the use of centrifugal force at different stages of steel production

Influence of EMS on Asymmetric Flow with Different SEN Clogging Rates in a Slab Continuous Casting Mold

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