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射頻等離子體球化中鉬粉顆粒加熱過程的數(shù)值模擬
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1.南華大學(xué)電氣工程學(xué)院;2.核工業(yè)西南物理研究院

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國家自然科學(xué)基金資助(項(xiàng)目號(hào)11535003)


Numerical simulation of heating process of Molybdenum powder in radio frequency plasma spheroidization
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1.University of south China;2.Southwestern Institute of Physics

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    摘要:

    對(duì)射頻等離子體球化中鉬粉顆粒的加熱過程進(jìn)行研究可以為優(yōu)化等離子體制備球形鉬粉的工藝過程提供參考。本文采用了數(shù)值模擬的方法研究了線圈電流頻率、粉槍位置及送粉速率等參數(shù)對(duì)鉬粉顆粒在射頻等離子體中的運(yùn)動(dòng)軌跡及加熱過程的影響效應(yīng)。研究結(jié)果表明：線圈電流頻率較低時(shí),等離子體炬軸線附近的溫度更高,鉬粉顆粒在等離子體中運(yùn)動(dòng)時(shí)能夠達(dá)到的溫度也更高；改變粉槍位置僅對(duì)粒徑較小顆粒的運(yùn)動(dòng)和加熱有較大的影響；降低送粉速率可以提高顆粒從等離子體中獲得的能量,從而在一定程度上提升鉬粉的球化率。

    Abstract:

    Study on heating process of molybdenum particles in radio frequency plasma can provide theoretical guidelines for improving preparation process of plasma spheroidization. In this paper, the effect of coil current frequency, postion of injection probe tip and powder feeder rate on motion trajectories and heating process of molybdenum particles in plasma have been studied by using numerical simulation method. The research shows that molybdenum particles can be heated to higher temperature during the spheroidization process when coil current frequency is lower beacuase of higher plasma temperature; Chaning of injection probe tip postion have great effect on motion and heating of smaller particles; Decrease of powder feeder rate can increase the energy get from plasma, thus improving the spheroidization effect.

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陳文波,陳倫江,劉川東,程昌明,童洪輝.射頻等離子體球化中鉬粉顆粒加熱過程的數(shù)值模擬[J].稀有金屬材料與工程,2019,47(3):859~864.[CHEN Wen-bo, CHEN Lun-jiang, Liu Chuan-dong, CHENG Chang-ming, TONG Hong-hui. Numerical simulation of heating process of Molybdenum powder in radio frequency plasma spheroidization[J]. Rare Metal Materials and Engineering,2019,47(3):859~864.]
DOI：10.12442/j. issn.1002-185X.20170657

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  • 收稿日期:2017-07-25
  • 最后修改日期:2017-09-06
  • 錄用日期:2017-11-08
  • 在線發(fā)布日期: 2019-04-10
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