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Study on Mechanism of Large Bubble Formation in Slab Continuous Casting Mould with Argon Blowing
Author(s) -
ZHENG Shuguo,
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.200806221
Subject(s) - bubble , nozzle , mechanics , argon , slab , water model , materials science , volumetric flow rate , continuous casting , mechanism (biology) , casting , flow (mathematics) , composite material , thermodynamics , chemistry , engineering , physics , structural engineering , quantum mechanics , computational chemistry , organic chemistry , molecular dynamics
A physical model was established to study the mechanism of large bubble formation in a slab continuous casting mould with argon blowing and the effects of operation parameters on it were investigated. The results show that there are two mechanisms of large bubble formation, (i) the aggregation mechanism of bubbles at the upper tip of the nozzle port exit and (ii) the aggregation mechanism of bubbles during the floating process. The former just exists for a certain water flowrate when the gas flowrate is bigger than a certain value, while the latter always exists. Furthermore, the optimal gas flowrate to restrain the large bubble formation was presented by the physical model.