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Numerical Analysis of Fluctuation Behavior of Steel/Slag Interface in Continuous Casting Mold with Static Magnetic Field

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Abstract

Utilizing ANSYS CFX commercial software and volume fraction of fluid (VOF) model, fluctuation behavior of steel/slag interface was numerically simulated in continuous casting mold with static magnetic field, and the influence of metal jet characteristics on the behavior of steel/slag interface was investigated. The results indicated that the behavior of steel/slag interface is similar at different process parameters, which is closely related to the characteristic of the flow field. The steel/slag interface has an obvious trough characteristic, which can be divided into three zones: frontal valley zone, back valley zone and horizontal zone; as the magnetic flux density increases, the fluctuation of liquid level increases firstly and then decreases, and a reasonable magnetic flux density can make steel/slag interface obtain a relatively flat interface, which can prevent slag from being entrapped into liquid steel. For a thin slab continuous casting process, when the casting speed is 4 m/min, a reasonable magnetic flux density is about 0. 5 T, and the interfacial fluctuation is weaker. No matter the position of magnetic field is horizontal or vertical, for different operating parameters, there is a corresponding reasonable magnetic field position where the steel/slag interface fluctuation can be properly controlled and slag entrapment can be prevented.

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Abbreviations

B 0 :

Magnetic flux density, T

d:

Nozzle diameter, m

E :

Electrical field strength, V/m

F :

Lorentz force, N/m3

f :

Interaction force, N/m3

g :

Gravitational acceleration, m/s2

J :

Current density, A/m2

k:

Turbulent kinetic energy, m2/s2

p:

Pressure, Pa

t:

Time, s

u :

Velocity, m/s

ν:

Normal velocity of inlet, m/s

α:

Volume fraction

ε:

Rate of turbulent energy dissipation, m2/s3

μ:

Effective viscosity, kg/(m · s)

ρ:

Density, kg/m3

σ:

Electrical conductivity of the steel, S/m

ϕ:

Electrical potential, V

m:

Steel

s:

Slag

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Authors and Affiliations

  1. Key Laboratory for Electromagnetic Processing of Materials of Ministry of Education, Northeastern University, Shenyang, Liaoning, 110004, China

    An-yuan Deng (Doctor, Professor), Lin Xu, En-gang Wang & Ji-cheng He

Authors
  1. An-yuan Deng
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  2. Lin Xu
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  3. En-gang Wang
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  4. Ji-cheng He
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Corresponding author

Correspondence to An-yuan Deng.

Additional information

Foundation Item: Item Sponsored by National Natural Science Foundation of China (50604005, 50834009); Natural Science Foundation of Liaoning Province of China (20102074); Fundamental Research Funds for the Central Universities of China (N100409005); Key Grant Project of Chinese Ministry of Education (311014); “111” Project of China (B07015)

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Deng, Ay., Xu, L., Wang, Eg. et al. Numerical Analysis of Fluctuation Behavior of Steel/Slag Interface in Continuous Casting Mold with Static Magnetic Field. J. Iron Steel Res. Int. 21, 809–816 (2014). https://doi.org/10.1016/S1006-706X(14)60146-1

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  • DOI: https://doi.org/10.1016/S1006-706X(14)60146-1

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