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Physical Modelling of Inclusion Behaviour in Secondary Refining with Argon Blowing
Author(s) -
Zheng Shugou,
Zhu Miaoyong
Publication year - 2008
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.200806184
Subject(s) - ladle , inclusion (mineral) , refining (metallurgy) , argon , materials science , emulsion , flow (mathematics) , volumetric flow rate , mechanics , thermodynamics , chemistry , metallurgy , mineralogy , physics , biochemistry , organic chemistry
The effects of gas blowing time and flow rate on inclusion removal in a ladle were quantitatively investigated. A physical model was developed where emulsion drops simulate the collision and aggregation of inclusions in steel. The results show that most of the inclusions can be removed within eight minutes at lower gas flow rates, whereas sixteen minutes are needed with larger gas flow rates. All the inclusions which had the possibility to be removed almost disappeared from the system in twenty‐eight minutes. Both the high and the low gas flow rates seemed to be efficient for inclusion removal, which was explained based on discussing the mechanism of inclusion removal by bubbles. In addition, it was found that the inclusion removal was in exponential relationship with gas blowing time.