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Non‐Metallic Inclusion Behaviors in a New Tundish and SEN Design Using a Swirling Flow during Continuous Casting of Steel
Author(s) -
Ni Peiyuan,
Jonsson Lage Tord Ingemar,
Ersson Mikael,
Jönsson Pär Göran
Publication year - 2017
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201600155
Subject(s) - tundish , materials science , mechanics , continuous casting , flow (mathematics) , centripetal force , non metallic inclusions , inclusion (mineral) , metallurgy , slag (welding) , buoyancy , physics , thermodynamics
The behaviors of non‐metallic inclusions in a new tundish and SEN design enabling a swirling flow are investigated by using a Lagrangian particle tracking scheme. The results show that 99% of both Al 2 O 3 and Ce 2 O 3 inclusions are removed from both the top surface and the other tundish walls with a “trap” boundary condition, while only around 60% are removed from the top surface of tundish for a “reflect” boundary condition at the other tundish walls. Large size non‐metallic inclusions of different densities show a large difference under a “reflect” boundary condition at tundish walls, due to a high buoyancy of light inclusions. In the swirling flow SEN, a much smaller number of large Al 2 O 3 inclusions touches the wall compared to Ce 2 O 3 inclusions. This is due to that they have larger deviations from the steel flow path compared to heavy Ce 2 O 3 inclusions, due to the centripetal force. For small size inclusions, the centripetal separation is not effective neither for the light Al 2 O 3 inclusions nor for the heavy Ce 2 O 3 inclusions in the current swirling flow SEN with a swirl number of 0.4. Light Al 2 O 3 inclusions larger than 40 µm can be influenced by the current centripetal force.