Effects of Angle of Rotation of Submerged Entry Nozzle on Fluid Flows in a Square Billet Casting Mold

Aboutalebi, M. Mahdi; Lapointe, Francis; D’amours, Julien; Isac, Mihaiela; Guthrie, R. I. L.

doi:10.1007/s11837-018-2938-5

Cited by 11 publications

(6 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to the swirling flow nozzle technology, studies on straight nozzle port design were also carried out in the past to avoid a strong jet flow in mold. This work was probably first reported in 2001 by Sun and Zhang, [60,61] and studies on this method were also carried out by Aboutalebi et al [62] and Lin et al [63] Figure 17 shows the structure of different nozzle port designs. Sun and Zhang [60] investigated the influence of such a port design on the flow pattern, temperature distribution, and solidification behavior in a round mold.…”

Section: Straight Nozzle Port Designmentioning

confidence: 83%

A Review on Swirling Flow Casting Technology in Steel Production

Xie

Nabeel

Ersson

et al. 2021

steel research int.

View full text Add to dashboard Cite

Casting is the final step of steel from liquid to solid state with a decreased steel temperature, where some complex phenomena occur in casting mold, as shown in Figure 1, [1] such as multiphase flow, heat transfer, phase transition, solute redistribution, and so on. During solidification process, some defects of steel semi-product like cracks and macrosegregation can form, which can significantly deteriorate steel mechanical properties. These defects normally are difficult to be completely removed in a subsequent heat treatment process. Therefore, a good control on steel solidification process is of great significance for both steel quality and casting efficiency.Steel casting includes two routes, namely continuous casting and ingot casting. According to statistics from World Steel Association, the global output of crude steel in 2020 is around 1.878 billion tons, over 96.9% of which is produced through continuous casting process. [2] Therefore, continuous casting has become the main process in global steel production. However, ingot casting is still used today to produce, for example, some high-alloyed steel, large size round bloom, and so on, which also plays an important role in production of some steel categories. In past years, steel casting process especially continuous casting has made enormous progress. These are realized by optimizing the submerged entry nozzle (SEN) structure, [3][4][5] casting speed, [6][7][8] argon blowing in nozzle, [9][10][11] electromagnetic braking, [12][13][14] mold electromagnetic stirring (M-EMS), [15][16][17] second-cooling segment electromagnetic stirring (S-EMS), [18][19][20] final electromagnetic stirring (F-EMS), [21][22][23] and so on. To further improve the steel flow field in mold, as early as 1994, Yokoya et al. [24] first proposed the swirling flow nozzle casting technology, which aims to induce a rotational steel flow inside SEN. This rotational flow momentum can change SEN outlet flow pattern to avoid the formation of a jet flow in mold that is commonly observed in the case of the straight nozzle continuous casting. [24] Furthermore, it can also promote a uniform flow on the cross-section of SEN side port. Therefore, the mold flow pattern can be optimized as soon as steel moves into the mold. Plant trials have confirmed that this technology can effectively improve the quality of steel semi-product and alleviate the SEN side-port clogging in continuous casting. [25] In recent years, the swirling flow nozzle casting technology has attracted worldwide attention. A great number of studies have been carried out, as shown in Table 1, and these studies will be comprehensively introduced in Section 2 and 3 in this paper, including different realization technologies, main findings, and metallurgical effects. This aims to promote the understanding of multiphysical phenomena induced by the swirling flow. Also, new technology development and research progress on swirling flow steel casting will be summarized. Swirling Flow Continuous Casting Swirl Blade TechnologyIn 1994, Yoko...

show abstract

Section: Straight Nozzle Port Designmentioning

confidence: 83%

A Review on Swirling Flow Casting Technology in Steel Production

Xie

Nabeel

Ersson

et al. 2021

steel research int.

View full text Add to dashboard Cite

show abstract

“…[2,3] Among the various parameters affecting the steel flow, the adjustment of the submerged nozzle and application of electromagnetic fields are the two most effective ways to improve the steel flow in the mould. [4,5] The flow of steel in the mould can be improved or aggravated by adjusting nozzle characteristics such as the number of ports, port angles, and immersion depth of the submerged entry nozzle (SEN). [6,7] The functions of the SEN include preventing liquid steel from spattering and improving the billet temperature and flow-field distribution.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Nozzle Position on Fluid Flow and Solidification in a Billet Curved Mould using Mould Electromagnetic Stirring

Wang

Qiu

Zhu

et al. 2023

steel research int.

View full text Add to dashboard Cite

Owing to the smaller cross-sectional size of the billet, the effect of the position of the submerged entry nozzle (SEN) on the fluid flow in a curved mold is more prominent. The transient fluid flow, heat transfer, and solidification behavior at different nozzle positions and mold electromagnetic stirring (M-EMS) are investigated using a 3D transient mathematical model. The symmetry index, S, is introduced to quantitatively evaluate the symmetry of the flow field. When the SEN is offset to the outer curve, S is the highest, the flow field mixing is the best, and the liquid level fluctuation is minimal. When the SEN is offset to the inner curve, S is the lowest, and the washing of the solidified shell on the inner curve side is more significant, causing the solidified shell thickness on the inner curve to be thinner, which can easily cause steel breakout accidents. The M-EMS can improve the uneven flow field caused by the nozzle position. In actual production, the SEN can be appropriately offset to the outer curve, and the application of M-EMS can improve the flow field distribution of molten steel.

show abstract

“…As the section of the round bloom increases, the solidification rate decreases significantly, and the flow field distribution in the mold is different from that in the small cross section. Reasonable control of molten steel flow in round bloom mold can effectively reduce both internal and surface defects [ 1 , 2 ]. The main measures to improve the mold flow are changing the nozzle structure and applying mold electromagnetic stirring (M-EMS).…”

Section: Introductionmentioning

confidence: 99%

Effect of Swirling Flow Nozzle on Fluid Flow and Solidification in a Round Bloom Continuous Casting Mold

et al. 2022

View full text Add to dashboard Cite

The nozzle structure has an important effect on the fluid flow in the mold, which can significantly improve the solidified shell and product quality of alloy steel round bloom. The transient fluid flow, heat transfer, and solidification behavior under different nozzle structures and mold electromagnetic stirring (M-EMS) are investigated using a 3D transient mathematical model. The results show that a third small recirculation zone appears near the meniscus after the application of the swirling flow nozzle (SFN). The impact depth of SFN is shallower than that of the original submerged entry nozzle (SEN) impact, and the lower circulation zone is shifted upward. The horizontal swirling flow generated by SFN can significantly weaken the washing of the initial shell by high-temperature steel and improve the uneven growth phenomenon of the inner and outer curved solidified shell caused by mold curvature. The swirling flow produced by M-EMS in the mold can also improve the washing of the initial shell by the high-temperature jet and the uneven growth of the inner and outer curved shell. M-EMS can expand the high-temperature zone in the upper part of the mold, promote the superheat dissipation of the molten steel, and promote the growth of the solidified shell. In addition, after the application of M-EMS, the tangential velocity of –15° SFN in the meniscus is smaller, and the resulting liquid level fluctuation is lower at 5.07 mm, which is less likely to produce slag entrapment and is conducive to improving the quality of round bloom.

show abstract

Effects of Angle of Rotation of Submerged Entry Nozzle on Fluid Flows in a Square Billet Casting Mold

Cited by 11 publications

References 15 publications

A Review on Swirling Flow Casting Technology in Steel Production

A Review on Swirling Flow Casting Technology in Steel Production

Effect of Nozzle Position on Fluid Flow and Solidification in a Billet Curved Mould using Mould Electromagnetic Stirring

Effect of Swirling Flow Nozzle on Fluid Flow and Solidification in a Round Bloom Continuous Casting Mold

Contact Info

Product

Resources

About