Characteristics of SEN clogging and adhesive behavior of oxide inclusion during continuous casting of Ti-stabilized ultra-pure ferritic stainless steels

Bai, Xue-feng; Sun, Yonghui; Wu, Huibin

doi:10.1007/s42243-022-00858-5

Cited by 3 publications

(1 citation statement)

References 32 publications

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“…In some cases, it may also result in severe nozzle clogging, causing interruption in continuous casting. [5][6][7] Therefore, it is quite necessary to remove the nonmetallic inclusions as soon as possible so as to improve the quality of the molten steel and make the quality of the casting billet further improved.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Coalescence Behavior of Liquid Inclusion Particles in Argon Bubble Wake Flow

Zhang,

Zhu,

et al. 2024

steel research int.

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Microinclusions in steel will significantly affect mechanical performance of final products and therefore require serious concern during metallurgical process. Herein, the collision, coalescence as well as floatation of bubble–inclusion coexisting system is fully studied through a new mathematical model. It comes to the following conclusions: as bubbles rise, they induce a flow of liquid steel from their upper surface to their lower surface, and inclusion droplets rise and collide in the wake of the bubble. The velocity of the bubbles is affected by their deformation, with deformation rates being linked to the Weber number. The coalescence time of these inclusions is primarily influenced by viscosity and surface tension. Coalescence accelerates with higher surface tension or reduced viscosity, and this phenomenon can be described by a formula, which is developed by simulation results. According to this formula, coalescence time of 3CaO·Al2O3 is 20% longer than that of 12CaO7·Al2O3. Consequently, 12CaO7·Al2O3 is more prone to coalescence. The movement of inclusions can be controlled by adjusting gas volume and flow rate. Moreover, promoting coalescence can be achieved by altering the viscosity of inclusions and the surface tension coefficient, making it easier to remove these unwanted inclusions.

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Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Coalescence Behavior of Liquid Inclusion Particles in Argon Bubble Wake Flow

Zhang,

Zhu,

et al. 2024

steel research int.

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Study on the Mechanism and Control of Clogging Growth on the Submerged Entry Nozzle of Q355 Steel

Wang,

Wang

2024

steel research int.

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To clarify the formation mechanism of clogging on submerged entry nozzle of Q355 steel, scanning electron microscope‐energy dispersive spectrometer (SEM‐EDS), cathodoluminescence and FactSage7.1 thermodynamic software are used to study the morphology and stratified structure of Q355 steel nozzle. The results show that, clogging on Q355 steel can be divided into decarburized layer, ≈1.5 mm, dense accumulation layer, about 2 mm, and loose accumulation layer, ≈1.5 mm. The phenomenon of CaO·2Al2O3, CaO, Ti2O3, Al2O3, and 2CaO·Ti2O3 inclusions precipitated from the molten steel and deposited in the inner wall of the nozzle during continuous casting is analyzed. The formation mechanism of the clogging is explained by drawing the clogging process diagram and thermodynamic calculation. The range of total Ca content in molten steel which should be controlled between 0.0012% and 0.0016% to reduce clogging at the nozzle is given.

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Thermal, flow and inclusions analysis of clogging mechanism in continuous casting process

Liang,

Wang,

Liu

et al. 2025

Case Studies in Thermal Engineering

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Characteristics of SEN clogging and adhesive behavior of oxide inclusion during continuous casting of Ti-stabilized ultra-pure ferritic stainless steels

Cited by 3 publications

References 32 publications

Numerical Investigation on Coalescence Behavior of Liquid Inclusion Particles in Argon Bubble Wake Flow

Numerical Investigation on Coalescence Behavior of Liquid Inclusion Particles in Argon Bubble Wake Flow

Study on the Mechanism and Control of Clogging Growth on the Submerged Entry Nozzle of Q355 Steel

Thermal, flow and inclusions analysis of clogging mechanism in continuous casting process

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