Effects of various parameters on ultrasonic separation of inclusions from magnesium alloy melt

The acoustic radiation force generated by ultrasonic standing wave in the flow media can make solid particles suspending in the liquid agglomerate at the nodal planes of the waves and then realize their separation, which is also known as ultrasonic agglomeration in chemical industry. In this paper,...

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Bibliographic Details
Published in:Materialwissenschaft und Werkstofftechnik 2012-03, Vol.43 (3), p.220-225
Main Authors: Shao, Z.-W., Le, Q.-C., Zhang, Z.-Q., Cui, J.-Z.
Format: Article
Language:English
Subjects:
Einschlüsse
Inclusions
Magnesium alloy
Magnesiumlegierung
Numerical calculation
Numerische Berechnung
Ultraschall
Ultrasonic
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Summary:The acoustic radiation force generated by ultrasonic standing wave in the flow media can make solid particles suspending in the liquid agglomerate at the nodal planes of the waves and then realize their separation, which is also known as ultrasonic agglomeration in chemical industry. In this paper, ultrasonic waves were employed to promote and accelerate the separation of inclusions from magnesium alloy melt, and the effect of acoustic radiation forces on oxide inclusions removal from magnesium alloy melts were studied by numerical calculation. The agglomeration behavior of the inclusions was also obtained by solving the equations of motion for inclusions. Finally, parametric studies, usually very helpful for continued optimization and design efforts, were carried out to evaluate the effects of various parameters such as ultrasonic power, ultrasonic treating time, particle size and density difference between particle and melt on the inclusions distribution. The results indicate that when a moderate ultrasonic power was applied, most of inclusions could agglomerate at wave nodes in a short time which finally enhanced and accelerated the separation of inclusions from magnesium alloy melt.
ISSN:0933-5137
1521-4052
DOI:10.1002/mawe.201200843