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Modeling and Experiments on Electromagnetic Separation of Inclusions from Aluminum Melt under Combined Magnetic Field
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Modeling and Experiments on Electromagnetic Separation of Inclusions from Aluminum Melt under Combined Magnetic Field
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National Natural Science Foundation of China (50904042)

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    摘要:

    復(fù)合磁場是金屬電磁凈化的一種新方法，通過實(shí)驗(yàn)和數(shù)值模擬，研究由旋轉(zhuǎn)磁場和行波磁場組成的復(fù)合磁場電磁凈化的效果。裝置模型由2組三相交流線圈組構(gòu)成，通過有限元法分別計(jì)算旋轉(zhuǎn)磁場、行波磁場及其復(fù)合磁場作用下的電磁體積力、流場分布。結(jié)果顯示，旋轉(zhuǎn)磁場電磁力使得流場水平轉(zhuǎn)動(dòng)，下行波磁場電磁力分布驅(qū)動(dòng)外壁容易向下運(yùn)動(dòng)，在中心形成向上束流；而復(fù)合磁場則兼具兩者效果。數(shù)模擬數(shù)據(jù)與實(shí)驗(yàn)結(jié)果吻合度較好。為了探討復(fù)合磁場電磁凈化的機(jī)理，計(jì)算熔體中第二相夾雜物的體積分布和模擬顆粒在熔體中的運(yùn)動(dòng)軌跡。分析結(jié)果表明：流場和阿基米德力是影響顆粒運(yùn)動(dòng)的2個(gè)主要因素；復(fù)合磁場相對(duì)于單一磁場具有更優(yōu)越的凈化效果。

    Abstract:

    Numerical simulation and experiment studies have been conducted to investigate the effect of inclusions separation under combined magnetic field (CMF) generated by synchronous application of a rotating magnetic field (RMF) and a downward traveling magnetic field (TMF). The experimental setup is constituted by two sets of equidistant coils systems fed by out-of-phase alternating currents. The electromagnetic force field and flow field were calculated via finite-element analysis. CMF combines the rotational effect of RMF and the transport effect of TMF. Volume fraction and particle trajectories were simulated to examine the mechanism of particle separating. Good agreement between experimental and numerical results has been achieved. The flow field and the Archimedes electromagnetic force are the two main factors responsible for particle motion. This type of CMF provides a highly efficient approach at eliminating inclusions.

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邱樂園,李丘林,劉 偉. Modeling and Experiments on Electromagnetic Separation of Inclusions from Aluminum Melt under Combined Magnetic Field[J].稀有金屬材料與工程,2014,43(8):1793~1797.[Qiu Leyuan, Li Qiulin, Liu Wei. Modeling and Experiments on Electromagnetic Separation of Inclusions from Aluminum Melt under Combined Magnetic Field[J]. Rare Metal Materials and Engineering,2014,43(8):1793~1797.]
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  • 收稿日期:2013-08-25
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  • 在線發(fā)布日期: 2015-01-04
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