Initial Solidification Improvement of Continuously Cast Slab with In-mold Electromagnetic Stirring

Nakashima, Junji; Fukuda, Jun; Kiyose, Akihito; Kawase, Toshiaki; Ohtani, Yasuhiko; Doki, Masahiro; Fujisaki, Keisuke

doi:10.2355/tetsutohagane.93.565

Cited by 5 publications

(5 citation statements)

References 6 publications

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“…These magnetic systems sequence the forces to circulate the flow around the mold perimeter, which homogenizes meniscus temperature, thus improving the quality of the finished slab. [5,6] Okazawa et al used an large eddy simulation (LES) model and an experimental mercury model to study the effect of EMS magnet placement on flow circulation. The predicted velocities matched the measurements in the mercury model obtained with a Vives-type sensor.…”

Section: Introductionmentioning

confidence: 99%

Flow Control with Local Electromagnetic Braking in Continuous Casting of Steel Slabs

Cukierski

Thomas

2007

Metall Mater Trans B

130

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A computational fluid flow model is applied to investigate the effects of varying submerged entry nozzle (SEN) submergence depth and electromagnetic brake (EMBr) field strength on flow in the mold cavity. The three-dimensional, steady K-e model of the nozzle and liquid cavity in the mold used the magnetic induction method in FLUENT to incorporate the localized-type static EMBr field measured at a steel plant. The model was validated by comparing results with an analytical solution and with nail board and oscillation mark measurements collected at the plant. Increasing EMBr strength at a constant SEN depth is found to cause a deeper jet impingement, weaker upper recirculation zone and meniscus velocity, and a smaller meniscus wave. Increasing SEN depth without EMBr caused the same trends. Increasing SEN depth at a constant EMBr strength brought about the opposite: higher meniscus velocity, larger meniscus wave, and deeper penetration depth. Using the knowledge gained from this model, electromagnetic forces can be controlled to stabilize the fluid flow in the mold cavity and thereby minimize casting defects.

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Section: Introductionmentioning

confidence: 99%

Flow Control with Local Electromagnetic Braking in Continuous Casting of Steel Slabs

Cukierski

Thomas

2007

Metall Mater Trans B

130

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“…1), in which the rotational EMS is performed with a near-wall velocity of about 40 cm/s. 1,2,10) The characteristics of the calculated configuration and the boundary conditions used for the concentration computation are the same as given in the Ref. 10).…”

Section: )mentioning

confidence: 99%

“…the non-metallic inclusions are washed away from the solidifying shell by the horizontally stirred molten steel. 1,2) The content of smaller particles can be reduced in stirred turbulent flows by their more frequent collisions and coalescences, 3) because thus will appear larger inclusions with greater rising velocities and removal rates. Therefore, the knowledge and simulation of the particle agglomeration in the CC with EMS become important.…”

mentioning

confidence: 99%

“…the number of alumina particles per unit volume of steel, can be determined for m spherical particle types with the selected diameters d i and volumes V i , by solving the transport equations [4][5][6] div(v pi c i Ϫn t grad c i )ϭs i , iϭ1, 2,..., m ........... (1) where c i and v pi denote the concentration and the velocity of the particles of i-th type, n t is the turbulent viscosity and s i ϭG i ϩD i represents a source term, composed of a generation term G i Ͼ0 and a disappearance term D i Ͻ0.…”

mentioning

confidence: 99%

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Short Contribution to the Mathematical Modeling of Coagulation Effect on Entrapped Inclusion Concentration in Continuously Cast Steel

Peşteanu

2006

ISIJ Int.

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“…[3][4][5] Stirring the molten steel in the specific region of the mold is generally used to change the flow pattern. Besides, the flow pattern affects the inclusion capture and the molten steel's solidification in the mold.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Capture of Large Inclusion in Slab Continuous Casting with the Effect of In-mold Electromagnetic Stirring

et al. 2017

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Large inclusions captured by the solidifying shell deteriorate the surface quality of interstitial free steel. To investigate the capture of large inclusion in slab continuous casting, a three-dimensional model coupling flow field, solidification and inclusion motion has been developed. Additionally, to study the effect of in-mold electromagnetic stirring (M-EMS) on large inclusion capture, the electromagnetic field has been also coupled in the model. The results of electromagnetic field indicates its centrally symmetrical distribution on the cross-section, and the electromagnetic force swirls on the cross-section. The effects of M-EMS on flow pattern, solidification and inclusion capture have been discussed. The M-EMS significantly changes the flow pattern and solidifying shell thickness. The inhomogeneous distribution of large inclusions existing in the slab surface in the slab surface are different between the cases with and without M-EMS. Furthermore, the number of captured inclusions increases at 0-0.02 m beneath the wide surface and decreases at 0.02-0.04 m beneath the wide surface in response to the application of M-EMS. Large inclusions in steel were quantitatively analyzed by the galvanostatic electrolysis method. The experimental results are in agreement with the simulation results, suggesting that the model is valid.

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Initial Solidification Improvement of Continuously Cast Slab with In-mold Electromagnetic Stirring

Cited by 5 publications

References 6 publications

Flow Control with Local Electromagnetic Braking in Continuous Casting of Steel Slabs

Flow Control with Local Electromagnetic Braking in Continuous Casting of Steel Slabs

Short Contribution to the Mathematical Modeling of Coagulation Effect on Entrapped Inclusion Concentration in Continuously Cast Steel

Numerical Study on the Capture of Large Inclusion in Slab Continuous Casting with the Effect of In-mold Electromagnetic Stirring

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