Mathematical modelling of fluid flow inside trumpet-shaped ladle shrouds

Zhang, Jiangshan; Yang, Shufeng; Li, Maoyin; Chen, Zhuo; Jiang, Zhengyi; Li, Jingshe

doi:10.1080/03019233.2017.1292692

Cited by 10 publications

(4 citation statements)

References 10 publications

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“…The other is the trumpet-shaped ladle shroud (TLS), which is divided into a divergent chamber and a straight tube with a larger inner diameter (ϕ120 mm). The TLS was designed mainly based on our previous studies [ 23 , 24 ]. The basic design rules are that the length of the trumpet section should be at least four-fold of the inner diameter of the shroud outlet; the outlet size should not be larger than the inner diameter of the turbulence inhibitor.…”

Section: Methodsmentioning

confidence: 99%

Design Improvement of Four-Strand Continuous-Casting Tundish Using Physical and Numerical Simulation

Qin²,

Zhang³

et al. 2023

Materials

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The flow pattern is vital for the metallurgical performance of continuous casting tundishes. The purpose of this study was to design and optimize the flow characteristics inside a four-strand tundish. Numerical simulations and water model experiments were validated and utilized to investigate the flow behavior. The effect of different flow rates in the original tundish was evaluated; two modified retaining walls and a new ladle shroud were designed for optimization. The molten steel inside the original tundish tends to be more active as the flow rate increases from 3.8 L/min to 6.2 L/min, which results in a reduction in dead volume from 36.47% to 17.59% and better consistency between different outlets. The dead volume and outlet consistency inside the tundish are improved significantly when the modified walls are applied. The proper design of the diversion hole further enhances the plug volume from 6.39% to 13.44% of the tundish by forming an upstream circular flow in the casting zone. In addition, the new trumpet ladle shroud demonstrates an advantage in increasing the response time from 152.5 s to 167.5 s and alleviating the turbulence in the pouring zone, which is beneficial for clean steel production.

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Section: Methodsmentioning

confidence: 99%

Design Improvement of Four-Strand Continuous-Casting Tundish Using Physical and Numerical Simulation

Qin²,

Zhang³

et al. 2023

Materials

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“…Detailed flow structure between the lower nozzle and the ladle shroud was reported in Ref. 54,72) Besides, the one-side opening generates biased flow and impacts at one side of the inner lining of the ladle shroud. It is noted from Figs.…”

Section: Opening and Closing Of Slide Gatementioning

confidence: 99%

Advances in Ladle Shroud as A Functional Device in Tundish Metallurgy: A Review

et al. 2019

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Ladle shroud is a small but significant device in tundish metallurgy to facilitate both production process and steel quality. Past decades have witnessed its evolution from a simply shrouding tube to a multi-functional device in continuous casting processes. Advances in the functions of ladle shroud in tundish metallurgy have been reviewed in this work, including shrouding the teeming stream, fluid flow control, slag carry-over detection, and the potentials of heating and additive feeding. The features of various commercialized and novel ladle shrouds are discussed. The effect of practical operations, such as argon injection and misalignment, on the performance of ladle shrouds is also analyzed in this review.

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“…However, multiphase models of transient casting are relatively rare [1] due to the complicated metallurgical behaviors and the enormous calculation resources required. During ladle changeover, slag entrapment and secondary oxidation of steel often occur, increasing the oxygen content, [16][17][18] nozzle clogging, [19] and slag-type inclusions. [20,21] Zhang et al [22] used the volume of fluid (VOF) model to study the transient DOI: 10.1002/srin.202100536…”

Section: Introductionmentioning

confidence: 99%

Effect of Top‐Swirling Turbulence Inhibitor on Multiphase Flow in a Single‐Strand Tundish During Transient Casting

Zhang

Wang

Fang

et al. 2021

steel research int.

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The turbulence and multiphase flows in a single‐strand slab casting tundish during the start‐up operation, steady‐state casting, and the ladle changeover process without a turbulence inhibitor (TI), with an ordinary TI, and with a top‐swirling TI are numerically investigated and compared to assess the metallurgical advantages of a top‐swirling TI. The results show that the designed top‐swirling TI has no negative effect on the turbulence flow of molten steel during steady‐state casting, as the swirling flow may enhance the inclusion removal rate, and erosion of the guide vanes is relatively weak. During start‐up operation, the use of a top‐swirling TI effectively alleviated level fluctuations in the impact zone, which decreased from 38.75 mm at 90 s to 12.5 mm at the start‐up tonnage, then decreased to zero within 180 s. During ladle changeover, the second stage of steel exposure could be eliminated by the top‐swirling TI, while the areas of steel exposure remaine around 1550 and 750 cm2 without a TI and with an ordinary TI after 60 s of refilling time. The top‐swirling TI could effectively improve the turbulence flow of molten steel, avoiding secondary oxidation and slag entrapment, making it suitable for widespread application and popularization.

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Mathematical modelling of fluid flow inside trumpet-shaped ladle shrouds

Cited by 10 publications

References 10 publications

Design Improvement of Four-Strand Continuous-Casting Tundish Using Physical and Numerical Simulation

Design Improvement of Four-Strand Continuous-Casting Tundish Using Physical and Numerical Simulation

Advances in Ladle Shroud as A Functional Device in Tundish Metallurgy: A Review

Effect of Top‐Swirling Turbulence Inhibitor on Multiphase Flow in a Single‐Strand Tundish During Transient Casting

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