Numerical Investigation of Effect of Casting Speed on Flow Characteristics of Molten Steel in Multistrand Tundish

He, Fei; Wang, Hai-jun; Zhu, Zhenghai

doi:10.2355/isijinternational.isijint-2018-835

Cited by 16 publications

(11 citation statements)

References 25 publications

(24 reference statements)

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“…These findings indicate the advantage of higher flow rates in alleviating poor consistency and improving the flow pattern inside the origin tundish. However, these results are inconsistent with the conclusions obtained in some publications, such as the work by He et al [ 32 ], which shows that the increase in flow brings about a higher dead volume due to the reduction in the mean residence time, as traditionally believed. As for this four-strand tundish, the increased flow rates activate the melt motion around the far outlets, which narrows the difference between the near and far strands; as a result, the dead volume is reduced by the raised flow rates.…”

Section: Resultscontrasting

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: Resultscontrasting

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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“…Huang et al [13] used digital particle image velocimetry technology in a synthetic hydraulic model to establish that turbulent flow is transient and random and that the characteristics of vortex flow are not center symmetrical. He et al [14] built a simulation model to investigate the effect of casting speed on the flow pattern of a Materials 2020, 13, 5129 2 of 17 two-strand tundish and found that increasing the far-strand's casting speed could achieve a better flow characteristic, comparing with increasing the casting speed of each strand simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Effects of Multiple-Hole Baffle Arrangements on Flow Fields in a Five-Strand Asymmetric Tundish

et al. 2020

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This paper reports on the re-engineering of standard five-strand tundish designs into a five-strand asymmetric tundish, which resulted in a non-uniform rate and bias for each strand. We sought to improve the casting conditions by optimizing the liquid steel flow-field in the tundish. Both a water modelling experiment and a numerical simulation were performed to analyze the flow-field according to various diversion hole diameters and injection angles. The results showed that the average residence time decreased as the diameter of the diversion holes increased. As the injection angle was increased, the average residence time initially decreased and then increased. The liquid steel from the ladle shroud rapidly extended to the #2 and #3 strands in the original tundish, which reduced the likelihood of inclusion collision and coalescence.

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“…He et al [14] defined a critical velocity and used to evaluate the dead volume in simulations. In this study, the critical velocity of 0.002 m/s is used.…”

Section: Dead Volume Distribution and Its Fractionmentioning

confidence: 99%

Numerical Study on Gas Blown in Tundish Side Walls

Zhou

Huang

Niu

et al. 2022

J. Phys.: Conf. Ser.

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The performance of gas blown in side walls of a single strand tundish is numerically simulated. Three cases are studied, i.e. tundish without gas blown, tundish with gas blown from the right side wall, and from the front wall. The vortex circulating flow is the main flow structure in tundish without gas blown. The gas blown from the right side wall of tundish will significantly change the flow field. The short-circuit flow that the tracer flow along the bottom of tundish to the outlet is becoming the main flow pattern. The RTD curve shows a rapid increase tendency. An anticlockwise flow near the top surface is formed. The mixing of tracer in the tundish is delayed and the dead volume fraction is increased when compared with the tundish without gas blown case. In contrast, the gas blown from the front wall of tundish will divide the tundish into two parts. The strong circulation flow in two parts is formed. Besides, the mixing of tracer is faster and the dead volume fraction is lower than that of the case without gas blown. This case may be an optimized gas blown technology in tundish.

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Numerical Investigation of Effect of Casting Speed on Flow Characteristics of Molten Steel in Multistrand Tundish

Cited by 16 publications

References 25 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

Effects of Multiple-Hole Baffle Arrangements on Flow Fields in a Five-Strand Asymmetric Tundish

Numerical Study on Gas Blown in Tundish Side Walls

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