STUDY ON THE BEHAVIOUR OF BUBBLES IN A CONTINUOUS CASTING MOLD WITH Ar INJECTION AND TRAVELING MAGNETIC FIELD

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	STUDY ON THE BEHAVIOUR OF BUBBLES IN A CONTINUOUS CASTING MOLD WITH Ar INJECTION AND TRAVELING MAGNETIC FIELD
其他题名	STUDY ON THE BEHAVIOUR OF BUBBLES IN A CONTINUOUS CASTING MOLD WITH Ar INJECTION AND TRAVELING MAGNETIC FIELD
	Chen Zhihui; Wang Engang; Zhang Xingwu; Wang Yuanhua; Zhu Mingwei; He Jicheng
	2012
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	48 期号:8 页码:951-956
摘要	Steel flow control in a continuous slab caster mold is effective for preventing entrapments of both mold power and argon gas bubbles and maintaining high slab quality. The steel flow control technology that utilizes a traveling magnetic field to optimize the flow of steel in the mold has been developed and applied. The moving magnetic fields can induce accelerating flow (electromagnetic level accelerator, EMLA), decelerating flow (electromagnetic level stabilizer, EMLS) and rotating flow (electromagnetic rotary stirring, EMRS) according the travel direction of the fields. EMLS mode applies a low frequency alternating magnetic field that moves from the narrow face of the mold to the mold center below the nozzle exits. In this study, the model experiments were carried out using liquid alloy of Pb-Sn-Bi and argon gas to study the two-phase fluid flow in the mold with a low frequency traveling magnetic field. The resistance probe was applied to measure the distribution of gas bubbles below the liquid surface and in the deeper liquid phase in the mold. The effect of various parameters such as magnetic flux density, casting speed and argon gas flow rate on the movement and distribution of argon gas bubbles in the mold was studied. The results indicate that the quantity of gas bubbles near the narrow face increases with increasing argon gas flow rate and casting speed. With imposed traveling magnetic field, the quantity of gas bubbles near narrow face at deep position in the pool was decreased, so the possibility that gas bubbles were entrapped into the solidification shell of the steel can be decreased, and the asymmetrical floating of bubbles along the width of mold for a higher casting speed was depressed, so higher disturbances at the free surface in the mold caused by excessive floating of gas bubbles locally can be avoided. The investigations on the floating of big bubbles revealed that the coalescence and flotation of bubbles can be enhanced with imposed traveling magnetic field, and the floating of big bubbles along the width of mold get more uniformity at 0.12 T.
关键词	MOLTEN STEEL FLOW FLUID-FLOW NUMERICAL-SIMULATION ELECTROMAGNETIC BRAKE MULTIPHASE FLOW ENTRAPMENT MECHANISM SPEED MODEL model experiment continuous casting mold low frequency traveling magnetic field resistance probe bubbles distribution
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [Program for Innovative Research Team for Liaoning University] ; [Fundamental Research Funds for the Central Universityies]
CSCD记录号	CSCD:4623348
引用统计	被引频次：1[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/147050
专题	中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 GB/T 7714	Chen Zhihui,Wang Engang,Zhang Xingwu,et al. STUDY ON THE BEHAVIOUR OF BUBBLES IN A CONTINUOUS CASTING MOLD WITH Ar INJECTION AND TRAVELING MAGNETIC FIELD[J]. ACTA METALLURGICA SINICA,2012,48(8):951-956.
APA	Chen Zhihui,Wang Engang,Zhang Xingwu,Wang Yuanhua,Zhu Mingwei,&He Jicheng.(2012).STUDY ON THE BEHAVIOUR OF BUBBLES IN A CONTINUOUS CASTING MOLD WITH Ar INJECTION AND TRAVELING MAGNETIC FIELD.ACTA METALLURGICA SINICA,48(8),951-956.
MLA	Chen Zhihui,et al."STUDY ON THE BEHAVIOUR OF BUBBLES IN A CONTINUOUS CASTING MOLD WITH Ar INJECTION AND TRAVELING MAGNETIC FIELD".ACTA METALLURGICA SINICA 48.8(2012):951-956.