Physical and Numerical Investigations of Mould Flux Entrainment into Liquid Steel

Jowsa, J.; Bielnicki, M.; Cwudziński, A.

doi:10.1515/amm-2016-0329

Cited by 7 publications

(5 citation statements)

References 11 publications

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“…They imitated the slag layer using oils and steel using water‐sodium chloride solutions and determined the entrainment conditions, depending on physicochemical properties of these phases. The similar studies have been carried out by Jowsa et al, however the authors used a cylindrical‐shaped baffle. Scheller and Hagemann as well as Hagemann et al used the “single‐roller model” to direct water flow tangentially to the oil layer and they related entrainment conditions to the oil properties.…”

Section: Introductionmentioning

confidence: 81%

“…Therefore, the mold slag entrainment is the object of interest for scientists around the world. Research in‐plant are difficult to perform (high temperature, lack of phases and equipment transparency), however they can be successfully modeled using computational fluid dynamics and experiments based on water models …”

Section: Introductionmentioning

confidence: 99%

“…Research inplant are difficult to perform (high temperature, lack of phases and equipment transparency), however they can be successfully modeled using computational fluid dynamics [17][18][19] and experiments based on water models. [20][21][22][23][24] Many researchers investigated the mold slag entrainment using a simplified physical models, covering only the upper area of mold. For example, Savolainen et al [20] used a cuboid vessel with triangleshaped baffle mounted inside.…”

Section: Introductionmentioning

confidence: 99%

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Physical Modeling of Mold Slag Entrainment in Continuous Steel Casting Mold with Consideration the Impact of Mold Powder Layer

Bielnicki

Jowsa

2018

steel research int.

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This paper presents the results of laboratory experiments with the usage of water model of continuous steel casting mold for slabs casting. In laboratory experiments, the liquid slag layer is replaced by silicone oil, whereas mold powder layer is replaced by polypropylene particles. The obtained results has been analyzed using a statistical method based on Taguchi assumptions. Critical casting speeds are determined depending on the viscosity of liquid mold slag. Possible mechanisms of slag entrainment are also specified. It is explained, whether taking into account in laboratory experiment the presence of mold powder layer change the entrainment conditions. Based on the obtained results and their discussion it is concluded, that the presence of mold powder should not be ignored in laboratory experiments of continuous steel casting in mold, because to a certain extent it changes the behavior and entrainment conditions of the oil layer.

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Section: Introductionmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Physical Modeling of Mold Slag Entrainment in Continuous Steel Casting Mold with Consideration the Impact of Mold Powder Layer

Bielnicki

Jowsa

2018

steel research int.

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“…An important issue for tundish metallurgy is the determination of the steel flow velocity at the interface between the metallic and slag phases, in order to assess the possibility of the entrainment of non-metallic phase droplets by steel streams and their transport to its volume. Figure 7 shows the maps of the velocity and direction of liquid steel flow with a limit value of 0.3 m/s; when this is exceeded, it is possible to initiate the phenomenon of transferring the non-metallic phase to the liquid steel [ 51 , 52 , 53 ]. In none of the variants of the installation of the SFC tundish with, and without, a cavity were velocity areas characterized by exceeding the critical speed value.…”

Section: Resultsmentioning

confidence: 99%

Numerical and Physical Study on New Simple Design of Subflux Flow Controller for One-Strand Tundish

Cwudziński

2022

Materials

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Tundish metallurgy is essential for continuous steel casting technology. In this study, the subflux flow controller (SFC) installed in the tundish pouring zone was tested, demonstrating the possibility of simultaneously reducing the dimensions of the flow control device (FCD) and effectively influencing the structure of the liquid steel flow. On the basis of computer simulations and water model trials, results were obtained describing the hydrodynamic structure in considered variants of the one strand slab tundish. Considering the influence of the SFC on the steel flow structure in the tundish, and the gradient of the wall shear stress and total pressure on the SFC surface/tundish walls, the most optimal SFC variant for a single-strand wedge-type tundish is SFC No. 2C.

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“…When there are multiple phases in the calculation domain, the fluid density and viscosity in the calculation domain are calculated by the following formulas [25][26][27]:…”

Section: Model Algorithm In Simulation Computationmentioning

confidence: 99%

Numerical Simulation of Mold Slag Entrapment Behavior in Nonoriented Silicon Steel Production Process

Huo,

Zhang,

Zhang

et al. 2024

Processes

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This paper is based on the surface defects of casting billets in the production process of nonoriented silicon steel plates at a steel plant in North China. Taking the parameters of a slab mold in the nonoriented silicon steel production process as a prototype, the flow field characteristics of the mold under the same section, different drawing speed and immersion depth were systematically studied by using a LES (large eddy simulation) and VOF (volume of fluid) coupling algorithm. The results show that under the current conditions, when the critical slag entrapment speed increases from 1.0 m/min to 1.2 m/min, the nozzle insertion depth increases linearly with the critical slag entrapment speed, while when the nozzle insertion depth exceeds 130 mm, the increasing effect of further increasing the nozzle insertion depth on the critical slag entrapment speed begins to decrease. When the drawing speed of continuous casting is kept constant at 1.4 m/min, the abnormal fluctuation height of the steel slag interface is significantly improved when the angle of the water nozzle is increased from 15° to 20°, and the proportion of slag entrapment is also reduced from 0.376% to 0.015%. When the nozzle angle is 25°, the slag entrapment ratio is reduced to 0%, and the steel slag interface also ensures a certain activity. The numerical simulation results were applied to the industrial site, and the slag inclusion rate and crack rate of the billet in the continuous casting process of nonoriented silicon steel were obviously improved after the optimization process.

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Physical and Numerical Investigations of Mould Flux Entrainment into Liquid Steel

Cited by 7 publications

References 11 publications

Physical Modeling of Mold Slag Entrainment in Continuous Steel Casting Mold with Consideration the Impact of Mold Powder Layer

Physical Modeling of Mold Slag Entrainment in Continuous Steel Casting Mold with Consideration the Impact of Mold Powder Layer

Numerical and Physical Study on New Simple Design of Subflux Flow Controller for One-Strand Tundish

Numerical Simulation of Mold Slag Entrapment Behavior in Nonoriented Silicon Steel Production Process

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