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Sökning: WFRF:(Andersson Nils A. I.) > (2021)

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1.
  • Yin, Jun, et al. (författare)
  • Experimental and Numerical Study of the Gas Entrainment During the Initial Mold Filling in an Uphill Teeming Ingot Casting Process
  • 2021
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The gas entrainment can influence surface disturbances during the filling in the uphill ingot teeming process. Surface disturbances can result in mold flux entrapments, leading to the generation of non-metallic inclusions which are detrimental to the final steel quality. A three-dimension simulation was conducted to study the gas entrainment during the filling process. Furthermore, a water model experiment was also carried out to validate the results from the numerical simulations. The results showed a good agreement between the numerical and physical models. Moreover, the formation of a big bubble can be observed at the bend between the trumpet and the horizontal runner, and between the horizontal runner and the vertical runner. The sizes of the big bubble fluctuate during the teeming process. The current study gives a specific overview of the gas entrainment phenomenon during the initial filling of the uphill teeming process.
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2.
  • Yin, Jun, et al. (författare)
  • Numerical study on the influence of the filling angle on the fluid flow during the ingot side teeming process
  • 2021
  • Ingår i: Steel Research International. - : Wiley. - 1611-3683 .- 1869-344X. ; 92:10
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • High turbulence at the liquid steel-mold flux interface can result in mold flux entrapments, which can generate non-metallic inclusions during the ingot casting process. Those non-metallic inclusions are detrimental to the final steel quality. The teeming process during ingot casting is typically carried out using the uphill teeming method. The authors propose a novel alternative method using a side teeming process, which decreases turbulence at the free surface. In order to define the optimum operational conditions, a 3-D mathematical model was developed to investigate the effect of the filling angle on the motion of the free surface and the resulting shear stresses during the teeming process. The investigated filling angles were: 0, 30, 45, 60 and 90 degrees. The present findings suggest that using the filling angle of 90 degrees between the mold and the runner would be an effective way of reducing the number of inclusions due to mold flux entrapments and refractory wear.
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  • Resultat 1-2 av 2
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tidskriftsartikel (2)
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övrigt vetenskapligt/konstnärligt (2)
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Jönsson, Pär (2)
Ersson, Mikael (2)
Andersson, Nils A. I ... (2)
Yin, Jun (2)
Wang, Shule, 1994- (1)
Guo, Shuo (1)
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