Numerical study of influence of casting speed on fluid flow characteristics in the four strand tundish

Boonpen, Kridsanapong; Kowitwarangkul, Pruet; Ninpetch, Patiparn; Phophichit, Nadnapang; Chuchuay, Piyapat; Threrujirapapong, Thotsaphon; Otarawanna, Somboon

doi:10.1016/j.matpr.2021.03.465

Cited by 6 publications

(5 citation statements)

References 7 publications

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“…et al [26] 2019 five-strand flow characteristics Q. Wang. et al [24] 2021 single-strand inclusion separation efficiency Boonpen K. et al [21] 2021 four-strand response time Liu Z. et al [22] 2022 eight-strand residence time and consistency…”

Section: Investigatorsmentioning

confidence: 99%

“…From the literature, it is clear that casting speed has a significant influence on the flow characteristics, temperature changes and separation efficiency of inclusions. For the flow characteristics, with the increasing of casting flow rate, it was found that the percentage of volume of dead flow decreases and the volume of well mixed flow increases [19], the minimum residence time (response time) decreases [20,21] and the uniformity of flow and temperature among multiple strands improves [22]. For the separation efficiency of inclusions, it was found that the separation efficiency decreased with increasing flow rate, thus more inclusions tend to move out through the outlets of the tundish [23].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Uniform and Non-Uniform Increasing Casting Flow Rate on Dispersion and Outflow Percentage of Tracers in Four Strand Tundishes under Strand Blockage Conditions

Fan

Chen

et al. 2022

Metals

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The flow field, tracer dispersion and uniformity of strands in two designs of four-strand tun-dishes under normal conditions and single-strand blockage conditions are studied by numerical simulation. The casting speed (flow rate) of strands are increasing uniformly or non-uniformly to improve the strand blockage condition. The uniformity of strands of the cases are evaluated by a novel outflow percentage analysis method. The results show that the flow field in the tundish does not change significantly when the single-strand is blocked or the casting flow rate is increased. After blockage of one strand, the consistency of each strand of u-shaped weir tundish is better than that of double-weir tundish. With the uniform increasing of the casting flow rate, the response time of each strand decreases and the outflow percentage increases. However, the uniformity of strands improved slightly in double-weir tundish but decreased in u-shaped tundish. For the double-weir tundish, significantly increasing the casting flow rate of the strand located in the blocked part by a factor of 1.5 and slightly increasing the casting flow rate of the other strands by a factor of 1.25, the consistency of each strand is the best. For the u-shaped weir tundish, the consistency of each strand is improved by non-uniform increasing of the casting flow rate of the strands. The flow rate of the strand located in the blocked part and the other strands is increased by a factor of 1.25, and 1.375 or 1.2 and 1.4 are the optimized cases.

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Section: Investigatorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Uniform and Non-Uniform Increasing Casting Flow Rate on Dispersion and Outflow Percentage of Tracers in Four Strand Tundishes under Strand Blockage Conditions

Fan

Chen

et al. 2022

Metals

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“…However, only a few researchers [15] explored the possible influence of gas aspiration in the ladle shroud on the flow behavior and macromixing characteristics of the tundish. Indeed, a vast majority of the studies on tundish metallurgy reported till date [16][17][18][19][20][21][22] have been worked out considering a single-phase (water/steel) flow through the ladle shroud. Therefore, it is essential to investigate and re-evaluate tundish hydrodynamic performance in the presence of gas aspiration because aspiration, rather than no-aspiration, is more typical of ladle to tundish transfer operation in continuous casting.…”

Section: Introductionmentioning

confidence: 99%

Role of Gas Aspiration through Ladle Shroud and Influence on Tundish Hydrodynamic Performances: A Physical and Mathematical Modeling Study

Ranjan,

Mazumdar

2024

steel research int.

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Gas aspiration through ladle shroud, during the teeming of a ladle into a tundish, has been investigated via physical and mathematical modeling. To this end, a volume of fluid‐based two‐phase turbulent flow model (in conjunction with the standard k–ε turbulence model) and a full‐scale two‐strand bloom casting tundish have been applied. Both flow and residence time distribution measurements are carried out in the full‐scale tundish system, adopting well‐established measurement techniques. Computational results, supported appropriately with experimentally measured data, indicate that gas aspiration alters flow and turbulence profoundly in the vicinity of the shroud entry zone. Early reversal of jetting flow toward the free surface, due to the buoyancy of the entrained gas, increases the overall intensity of motion in the tundish, creating more mixing flow volumes at the expense of plug flow volume. Most importantly, however, gas aspiration through shroud tends to drastically cut down interactions between the down coming liquid jet metal and the pouring box, making the specific design and shape of a pouring box redundant toward desirable flow modification. Finally, it is shown that strong surface flows and turbulence, generated due to gas aspiration, can be suitably damped by deploying a set of weirs, increasing plug flow volume in tundish.

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“…[ 3 ] Although tens of thousands of microsized inclusions exist in the molten steel, their direct observation is problematic. Therefore, researchers conduct laboratory tests and develop mathematical or physical analog models [ 4,5 ] to reproduce the flow field, temperature distribution, and motion of inclusions in the tundish. The most common physical analog model is a water model with a scale of the actual tundish, which is based on the Froude similarity criterion.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Motion and Removal of Inclusions in Continuous Casting Tundish with Multiorifice Filter

Liu

Ai-da²,

et al. 2022

steel research int.

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Numerical study of influence of casting speed on fluid flow characteristics in the four strand tundish

Cited by 6 publications

References 7 publications

Effect of Uniform and Non-Uniform Increasing Casting Flow Rate on Dispersion and Outflow Percentage of Tracers in Four Strand Tundishes under Strand Blockage Conditions

Effect of Uniform and Non-Uniform Increasing Casting Flow Rate on Dispersion and Outflow Percentage of Tracers in Four Strand Tundishes under Strand Blockage Conditions

Role of Gas Aspiration through Ladle Shroud and Influence on Tundish Hydrodynamic Performances: A Physical and Mathematical Modeling Study

Numerical Investigation on Motion and Removal of Inclusions in Continuous Casting Tundish with Multiorifice Filter

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