A Physical Model to Study the Effects of Nozzle Design on Dispersed Two-Phase Flows in a Slab Mold Casting Ultra-Low-Carbon Steels

Salazar-Campoy, María M.; Morales, R. D.; Nájera-Bastida, Alfonso; Calderon-Ramos, Ismael; Cedillo-Hernández, Valentín; Delgado-Pureco, J. C.

doi:10.1007/s11663-018-1181-3

Cited by 16 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many efforts have been made to control fluid flow in the mold, which is responsible for many surface and internal defects in steel slab casting [2][3][4]. To control the mold flow pattern and reduce surface instability in the mold, the effects of nozzle geometry including port shape [5][6][7], size [5], angle [5,[8][9][10], bottom design [5,11], and the flow control system [12] (stopper rod vs. slide gate) have been investigated. Other studies have investigated casting conditions including casting speed [13], argon gas injection [14][15][16], and nozzle submergence depth [17].…”

Section: Electromagnetic Control Of Steel Composition Distribution: Cmentioning

confidence: 99%

Electromagnetic Forces in Continuous Casting of Steel Slabs

Cho

Thomas

2019

Metals

View full text Add to dashboard Cite

This paper reviews the current state of the art in the application of electromagnetic forces to control fluid flow to improve quality in continuous casting of steel slabs. Many product defects are controlled by flow-related phenomena in the mold region, such as slag entrapment due to excessive surface velocity and level fluctuations, meniscus hook defects due to insufficient transport of flow and superheat to the meniscus region, and particle entrapment into the solidification front, which depends on transverse flow across the dendritic interface. Fluid flow also affects heat transfer, solidification, and solute transport, which greatly affect grain structure and internal quality of final steel products. Various electromagnetic systems can affect flow, including static magnetic fields and traveling fields which actively accelerate, slow down, or stir the flow in the mold or strand regions. Optimal electromagnetic effects to control flow depends greatly on the caster geometry and other operating conditions. Previous works on how to operate electromagnetic systems to reduce defects are discussed based on results from plant experiments, validated computational models, and lab scale model experiments.

show abstract

Section: Electromagnetic Control Of Steel Composition Distribution: Cmentioning

confidence: 99%

Electromagnetic Forces in Continuous Casting of Steel Slabs

Cho

Thomas

2019

Metals

View full text Add to dashboard Cite

show abstract

“…The flow field behavior of the molten steel in the mold could be affected by casting parameters, including slab width, [8,[10][11][12] casting speed, [8,11,13] argon flow rate, [14][15][16][17] submergence depth of submerged entry nozzle (SEN) [10,12,13,15] and SEN geometry. [11,12,18,19] Especially, the flow pattern in the CC mold was greatly affected by the casting speed and the argon flow rate. [20,21] The formation of the DRF is favored by increasing the casting speed and decreasing the argon flow rate.…”

Section: Introductionmentioning

confidence: 99%

Effect of Casting Parameters on the Flow Pattern in a Steel Continuous Casting Slab Mold: Numerical Simulation and Industrial Trials

Huang

Zhou

Zhang

et al. 2021

steel research int.

View full text Add to dashboard Cite

Herein, multiphase flow patterns in a continuous casting slab strand are studied using a 3D numerical model and nail board measurement. The motion and turbulence of the argon gas and molten steel are simulated using the Euler–Euler approach and the realizable κ–ϵ turbulence model, respectively. Casting parameters for a 1435 mm × 200 mm mold are optimized by both the simulation and the capillary number. The capillary number is calculated by the measured velocity and used to evaluate the capability of the slag entrainment by the turbulent flow. The optimized values of the casting speed and the gas flow under the current specific continuous casting condition are 1.4 m min−1 and 8 NL min−1, respectively. Slag entrainment might occur near the narrow face under a casting speed of 1.6 m min−1 and near the SEN under a gas flow rate of 15 NL min−1. Meanwhile, effects of casting speed and argon flow rate on the transformation of flow patterns inside the mold with different dimensions are analyzed. A software incorporated by a Graphical User Interface is developed to predict the flow pattern inside the mold for a given steel grade and casting parameters.

show abstract

“…[8] Surface roughness and the chemical reaction between inclusions and the nozzle material will affect the bond between the clogging and the nozzle. [9] To decrease or mitigate the clogging, various approaches have been used such as alternative nozzle materials, [10][11][12][13] change in chemistries of inclusions, [14][15][16] injection of argon, [17][18][19] and nozzle design. [20] In this work, control of nozzle material and the internal flow in the nozzle are implemented to cast Ti-SULC steels, aiming at the minimum clogging extent possible.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Fluid Flow of Liquid Steel through Clogged Nozzles: Thermodynamic Analysis and Flow Simulations

González-Solórzano

Morales

Gutiérrez

et al. 2020

steel research int.

View full text Add to dashboard Cite

Selected raw materials, surface treatment, and control of the internal flow fundamentals are applied to manufacture an anticlogging nozzle. This nozzle is compared with another one manufactured with a conventional alumina-graphite (AG) composite in a plant trial. The two nozzles, with and without clogging, are replicated with plastic and rubber materials and the flows, under unclogged and clogged conditions, are characterized using water modelling and mathematical simulations. The new nozzle material yields considerably less clogging than the nozzle with the conventional AG after casting four heats, yet, there is still clogging. Flow patterns, because of clogging, change radically and represent serious conditions for slab integrity and the productivity of the caster.

show abstract

A Physical Model to Study the Effects of Nozzle Design on Dispersed Two-Phase Flows in a Slab Mold Casting Ultra-Low-Carbon Steels

Cited by 16 publications

References 24 publications

Electromagnetic Forces in Continuous Casting of Steel Slabs

Electromagnetic Forces in Continuous Casting of Steel Slabs

Effect of Casting Parameters on the Flow Pattern in a Steel Continuous Casting Slab Mold: Numerical Simulation and Industrial Trials

Analysis of Fluid Flow of Liquid Steel through Clogged Nozzles: Thermodynamic Analysis and Flow Simulations

Contact Info

Product

Resources

About