Numerical investigation of the fluid flow in continuous casting tundish using analysis of RTD curves

Bensouici, Moumtez; Boutarfaïa, Ahmed; Talbi, K.

doi:10.1016/s1006-706x(09)60022-4

Cited by 30 publications

(14 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 3 exhibits the geometric dimension of the water model furnished with one weir, two dams and one turbulence inhibitor. Dynamic similarity is determined by requiring the Froude number in the water model, which is equivalent to that in the prototype, as shown in Equation (17).…”

Section: Water Model 221 Rtd Measurementmentioning

confidence: 99%

See 1 more Smart Citation

Application of Tanks-in-Series Model to Characterize Non-Ideal Flow Regimes in Continuous Casting Tundish

Sheng

Zong-shu

2021

Metals

View full text Add to dashboard Cite

This study describes a new tanks-in-series model for analyzing non-ideal flow regimes in a single-strand tundish. The tundish was divided into two interconnected tanks, namely an inlet tank and an outlet tank. A water model experiment was carried out to separately measure the residence-time distribution (RTD) of the two tanks. Drift beads were adopted in the water model experiment to simulate the non-metallic inclusions in molten steel. Dead volume fraction was evaluated by analyzing measured RTD curves. The ratio between mixed flow volume and plug flow volume was proposed as a new criterion to evaluate the inclusion removal. In the inlet tank, a higher mixed flow fraction was preferred to effectively release turbulent kinetic energy and enhance inclusion collision growth. In the outlet tank, a higher plug flow fraction was preferred to facilitate inclusion removal by flotation. The optimal positions of the weir were recommended based on the RTD analysis and the inclusion removal from the results of water model experiments. A theoretical equation was derived based on the tanks-in-series model, providing a good fitting function to analyze the experimental data. The confirmation test was performed by applying computational fluid dynamics simulations of liquid steel flow in the real tundish.

show abstract

Section: Water Model 221 Rtd Measurementmentioning

confidence: 99%

“…(Fr) m = (Fr) p (17) where m stands for water model and p is the prototype of the tundish. The Froude number Fr is defined as Equation ( 18)…”

Section: Water Model 221 Rtd Measurementmentioning

confidence: 99%

Application of Tanks-in-Series Model to Characterize Non-Ideal Flow Regimes in Continuous Casting Tundish

Sheng

Zong-shu

2021

Metals

View full text Add to dashboard Cite

show abstract

“…Due to the randomness of the fluid movement, different molten steel streams have different trajectories in the tundish, but the residence time distribution of the fluid in each calculation unit in the tundish still obeys the statistical law, so the RTD curve can be calculated by the function [20][21][22], and the theoretical RTD curve is shown in Figure 4. The parameters characterizing the flow characteristics of the tundish flow field can be calculated based on the RTD curve, such as the volume fraction of the mixing zone, the volume fraction of the piston zone, the volume fraction of the dead zone, the peak response time, and the short-circuit flow rate [23][24][25][26][27]. For a multi-flow reactor with a fluid domain volume of and an outlet flow rate of , the calculation formula for the theoretical average residence time of the fluid in the closed vessel is:…”

Section: Governing Equations and Boundary Conditionsmentioning

confidence: 99%

Analysis of Optimization Weights for Flow Field of Internal Rotation Stabilizer Coupled with Porous Retaining Wall

Liu

Jin

Feifang

et al. 2021

Metals

View full text Add to dashboard Cite

In this paper, the flow field of the approximate T-shaped tundish and the removal rate of fine inclusions are improved by changing the parameters of the flow control device of the SCB (stabilizer coupling baffle) structure. Studies have shown that the synergistic effect of the DPRW (double porous retaining wall) structure and the IRS (internal rotation stabilizer) structure has excellent performance in mixing the temperature composition of the molten steel, increasing the average residence time of the molten steel, reducing the volume fraction of the dead zone, and improving the removal rate of fine inclusions. The opening method and diameter of the double-layer retaining wall have a greater impact on the flow field parameters. The larger the diameter, the more conducive to increasing the average residence time, and the smaller the diameter, the more conducive to increasing the removal rate of fine inclusions.

show abstract

“…In the past three decades, most of the previous investigations have focused on steady-state casting operations. The flow pattern, heat transfer, and inclusion removal in the tundish could be well optimized by the installation of flow control devices, such as weirs and dams, [1][2][3][4][5][6] baffles with holes, [7][8][9] and turbulence inhibitors. [10][11][12][13] The steel cleanliness is also strictly controlled.…”

Section: Introductionmentioning

confidence: 99%

Multiphase Flow Behavior in a Single-Strand Continuous Casting Tundish during Ladle Change

Ling

Wang

et al. 2020

ISIJ Int.

View full text Add to dashboard Cite

The three-phase flow behavior in a single-strand continuous casting tundish during ladle change was investigated using physical modeling. These phenomena observed from physical modeling were explained by employing the multiphase model volume of fluid, which can track the interface behavior between the liquid steel, slag, and air during this operation. The effects of the refilling time and lowest operating level on the slag entrainment and the steel exposure during ladle change were analyzed and discussed, respectively. Increasing the refilling time significantly decreased the amount of entrained oil and the exposed area in the impact zone during ladle change. However, the increase in the lowest level had little influence on reducing the slag entrainment. To reduce the slag entrainment and the steel exposure during ladle change, the refilling time in the prototype should be larger than 3 minutes. Furthermore, the use of the turbulence inhibitor has also been evaluated. By diminishing the turbulence intensity in the impact zone and the velocity magnitude at the steel-slag interface, the turbulence inhibitor reduced considerably the amount of entrained slag and the steel reoxidation. The results indicated that the emulsification phenomenon during ladle change could be eliminated using TI-2, and the maximum exposed area fractions in the impact zone for different refilling times and lowest levels were less than 13% and 23%, respectively. Therefore, the TI-2 was recommended to improve the steel cleanliness during ladle change.

show abstract

Numerical investigation of the fluid flow in continuous casting tundish using analysis of RTD curves

Cited by 30 publications

References 3 publications

Application of Tanks-in-Series Model to Characterize Non-Ideal Flow Regimes in Continuous Casting Tundish

Application of Tanks-in-Series Model to Characterize Non-Ideal Flow Regimes in Continuous Casting Tundish

Analysis of Optimization Weights for Flow Field of Internal Rotation Stabilizer Coupled with Porous Retaining Wall

Multiphase Flow Behavior in a Single-Strand Continuous Casting Tundish during Ladle Change

Contact Info

Product

Resources

About