Wang, Qiangqiang, Zhang, Lifeng and Sridhar, Seetharaman (2016) Modeling on fluid flow and inclusion motion in centrifugal continuous casting strands. Metallurgical and Materials Transactions B, 47 (4). pp. 2623-2642. doi:10.1007/s11663-016-0701-2

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Abstract

During the centrifugal continuous casting process, unreasonable casting parameters can cause violent level fluctuation, serious gas entrainment, and formation of frozen shell pieces at the meniscus. Thus, in the current study, a three-dimensional multiphase turbulent model was established to study the transport phenomena during centrifugal continuous casting process. The effects of nozzle position, casting and rotational speed on the flow pattern, centrifugal force acting on the molten steel, level fluctuation, gas entrainment, shear stress on mold wall, and motion of inclusions during centrifugal continuous casting process were investigated. Volume of Fluid model was used to simulate the molten steel-air two-phase. The level fluctuation and the gas entrainment during casting were calculated by user-developed subroutines. The trajectory of inclusions in the rotating system was calculated using the Lagrangian approach. The results show that during centrifugal continuous casting, a large amount of gas was entrained into the molten steel, and broken into bubbles of various sizes. The greater the distance to the mold wall, the smaller the centrifugal force. Rotation speed had the most important influence on the centrifugal force distribution at the side region. Angular moving angle of the nozzle with 8° and keeping the rotation speed with 60 revolutions per minute can somehow stabilize the level fluctuation. The increase of angular angle of nozzle from 8 to 18 deg and rotation speed from 40 to 80 revolutions per minute favored to decrease the total volume of entrained bubbles, while the increase of distance of nozzle moving left and casting speed had reverse effects. The trajectories of inclusions in the mold were irregular, and then rotated along the strand length. After penetrating a certain distance, the inclusions gradually moved to the center of billet and gathered there. More work, such as the heat transfer, the solidification, and the inclusions entrapment during centrifugal continuous casting, will be performed.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics Q Science > QE Geology T Technology > TA Engineering (General). Civil engineering (General) T Technology > TN Mining engineering. Metallurgy T Technology > TS Manufactures
Divisions:	Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH):	Fluid inclusions, Fluid mechanics , Continuous casting
Journal or Publication Title:	Metallurgical and Materials Transactions B
Publisher:	Springer New York LLC
ISSN:	1073-5615
Official Date:	August 2016
Dates:	Date Event August 2016 Published 26 May 2016 Available 25 April 2016 Accepted
Date of first compliant deposit:	26 August 2016
Volume:	47
Number:	4
Page Range:	pp. 2623-2642
DOI:	10.1007/s11663-016-0701-2
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Guo jia zi ran ke xue ji jin wei yuan hui (China) [National Natural Science Foundation of China] (NSFC), Běijīng kējì dàxué (China) [University of Science and Technology Beijing], Lǜsè huíshōu běijīng shì zhòngdiǎn shíyàn shì hé jīnshǔ de tíqǔ (China) [Beijing Key Laboratory of Green Recycling and Extraction of Metals (GERM)], Lǜsè yějīn gōngyì yǔ mó mǐ shíyàn shì (China) [Laboratory of Green Process Metallurgy and Modeling (GPM)]
Grant number:	51274034 (NSFC), 51404019 (NSFC), 51504020 (NSFC),

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