In this section
@article{Chang:2018:10.2355/isijinternational.ISIJINT-2017-390,
author = {Chang, S and Cao, X and Zou, Z and Isa, M and Guthrie, RIL},
doi = {10.2355/isijinternational.ISIJINT-2017-390},
journal = {ISIJ International},
pages = {60--67},
title = {Micro-bubble formation under non-wetting conditions in a full-scale water model of a ladle shroud/Tundish system},
url = {http://dx.doi.org/10.2355/isijinternational.ISIJINT-2017-390},
volume = {58},
year = {2018}
}
TY - JOUR
AB - The effect of interfacial wettability on the size of gas bubbles releasing from orifices submerged in high velocity cross flow coupled with strong turbulence, was investigated in a full-scale water model of a commercial ladle/tundish/mold system, located at the McGill Metals Processing Centre. The present work attempted to simulate bubble formation in liquid steel passing through a ceramic (non-wetting) ladle shroud, with a high velocity and strong turbulence. This was accomplished by using a hydrophobic coating, sprayed onto the inner surface of the vertical acrylic ladle shroud, forming a contact angle of 150° at the three-phase line of contact, versus an angle of ~45° on the bare plexiglas surface. As such, the poor wettability of the treated acrylic surface of the ladle shroud led to slight increases in the diameters of micro-bubbles of 8.0%–22.4%, vs wetting systems, depending on gas flow rate and gas injection position. The present results indicate that the cross flows of liquid and their associated kinetic energy of turbulence within a ladle shroud flow can effectively refine bubbles into the micron size range, and prevent bubble growth caused by the poor wettability of liquid steel. Thus, argon gas injection through a ladle shroud could be an effective approach of producing small bubbles in liquid steel, even under the non-wetting conditions associated with such flows, which cannot be achieved by conventional gas curtain technique.
AU - Chang,S
AU - Cao,X
AU - Zou,Z
AU - Isa,M
AU - Guthrie,RIL
DO - 10.2355/isijinternational.ISIJINT-2017-390
EP - 67
PY - 2018///
SN - 0915-1559
SP - 60
TI - Micro-bubble formation under non-wetting conditions in a full-scale water model of a ladle shroud/Tundish system
T2 - ISIJ International
UR - http://dx.doi.org/10.2355/isijinternational.ISIJINT-2017-390
VL - 58
ER -
Climate Science
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