Optimizing of Submerged Entry Nozzle for Bloom Continuous Casting Based on Physical and Numerical Simulation

Wang, Pu; Tie, Zhanpeng; Xiao, H.; Zhu, Jiabin; Tang, Haiyan; Zhang, Jiaquan

doi:10.1002/srin.202200402

Cited by 6 publications

(2 citation statements)

References 36 publications

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“…(3) The position of the solidification front in the casting process is variable, so it is difficult to apply the wall function to the standard k − ε model. The mushy zone is considered as a porous media region, and the turbulence effect is calculated by the low Reynolds k − ε model [30,31]. (4) The magnetic Reynolds number R m is much less than 1 in the mold metallurgical process, i.e., the influence of the molten steel flow on the magnetic field is negligible.…”

Section: Coupling Modelmentioning

confidence: 99%

Behavior of Mold Electromagnetic Stirring for Round Bloom Castings and Its Eccentric Stirring Problem

et al. 2022

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In this paper, a mold electromagnetic stirring (M-EMS) model was established to investigate the behavior of M-EMS for round bloom castings under different conditions, and an electromagnetic-flow-heat transfer-solidification coupling model was established to explore the problem of eccentric stirring for various formats of round blooms. The results show that the magnetic flux density decreased with the increase in the current frequency, but the electromagnetic torque increases first and then decreases with it, and the same structure of M-EMS for round blooms has the same optimal current frequency at any current intensity. The electromagnetic torque and electromagnetic force both increase as a quadratic function of the current intensity, and the electromagnetic torque, which drives the steel flow, can directly characterize the real M-EMS performance. The mold copper tube has a significant magnetic shielding effect on M-EMS, the stirring intensity decreases rapidly as the tube thickness increases, and the optimal stirring frequency decreases as well. In fact, the deviation between the stirrer center and the geometric center of the strand can result in the eccentric stirring phenomenon. When blooms with a section size of Φ350 mm are produced by Φ650 mm SMS-Concast casting machine, the upper region of the inner arc side and the lower region of the outer arc side are subject to a stronger washing effect, which makes the temperature of the inner and outer arcs show alternating differences. The jet flow from the five-port nozzle can suppress the difference in initial solidification symmetry between the inner and outer arcs of round blooms caused by eccentric stirring. This paper reveals the magnetic shielding effect of the mold copper tube and the magnetic field loss of the air between the stirrer and the inner and outer arcs of the copper, which lead to the stirring intensity and the eccentric stirring phenomenon.

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Section: Coupling Modelmentioning

confidence: 99%

Behavior of Mold Electromagnetic Stirring for Round Bloom Castings and Its Eccentric Stirring Problem

et al. 2022

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“…This is achieved through the use of varying nozzle sizes, allowing for adjustments in the flow characteristics based on the specific requirements of the casting operation. The control process ensures a stable, consistent flow of liquid steel into the mold, aiding in the prevention of defects such as surface cracks or internal porosity [5][6][7]. Furthermore, the optimal design and configuration of the SEN ensure the production of high-quality steel products [8].…”

Section: Introductionmentioning

confidence: 99%

Influence of Submerged Entry Nozzles on Fluid Flow, Slag Entrainment, and Solidification in Slab Continuous Casting

Zhen,

Peng,

Zhang

2024

Metals

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In this paper, the fluid flow, slag entrainment and solidification process in a slab mold were studied using physical modeling and numerical simulation. The effect of two types of submerged entry nozzles (SENs) was also studied. The results showed that the surface velocity for type A SEN was larger than that using type B SEN. For type A SEN, the maximum surface velocity was 0.63 m/s and 0.56 m/s, and it was 0.20 m/s and 0.18 m/s for type B SEN. The larger shear effect on the top surface made the slag at narrow face impacted to the vicinity of 1/4 wide face, while the slag layer at the top surface was relatively stable for type B SEN. Increasing the immersion depth of SEN decreased the surface velocity and slag entrainment. For type A SEN, the thickness of the solidified shell at the narrow face of the mold outlet was thin (12.3 mm) and there was a risk of breakout. For type B SEN, the liquid steel with high temperature would flow to the meniscus and it was beneficial to the melting of the mold flux. The thickness of the solidified shell at the narrow face of the mold outlet was increased. Furthermore, the surface velocity was also increased and it was not recommended for high casting speed.

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Optimization of Submerged Nozzle and Chamfer Design in the Mold of Bloom Continuous Casting Process Using Numerical Simulation

Lu,

Pan,

Dou

et al. 2024

The Minerals, Metals &Amp; Materials Series

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Optimizing of Submerged Entry Nozzle for Bloom Continuous Casting Based on Physical and Numerical Simulation

Cited by 6 publications

References 36 publications

Behavior of Mold Electromagnetic Stirring for Round Bloom Castings and Its Eccentric Stirring Problem

Behavior of Mold Electromagnetic Stirring for Round Bloom Castings and Its Eccentric Stirring Problem

Influence of Submerged Entry Nozzles on Fluid Flow, Slag Entrainment, and Solidification in Slab Continuous Casting

Optimization of Submerged Nozzle and Chamfer Design in the Mold of Bloom Continuous Casting Process Using Numerical Simulation

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