| Numerical simulation during vacuum sublimation purification of metal Tm （I）： model foundation and validation |
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| 引用本文： | 张小伟,苗睿瑛,陈德宏,王志强,李宗安,颜世宏,金小礼.Numerical simulation during vacuum sublimation purification of metal Tm （I）： model foundation and validation[J].中国稀土学报(英文版),2013,31(2):180-185. |
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| 作者姓名： | 张小伟 苗睿瑛 陈德宏 王志强 李宗安 颜世宏 金小礼 |
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| 作者单位： | General Research Institute for Nonferrous Metals,Grirem Advanced Materials Co. Ltd.;School of Materials Science and Engineering,Shanghai University |
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| 基金项目： | Project supported by National Hi-Tech R&D Program of China(863Program,2011AA03A409);Major State Basic Research Development Program of China(973Program,2012BA01207) |
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| 摘 要： | The thermo physical parameters of Tm vapor and the range of sublimation temperature were determined by vapor pressure of metal Tm, and a 2-D axis-symmetric heat transfer model was developed to investigate the temperature distribution in sublimation furnace. The simulation results showed that, due to the heat loss at crucible bottom, the temperature of crucible, solid metal and Tm vapor increased with crucible height increasing, reached the maximum value in the middle of crucible in height direction, and then decreased rapidly; at the outside surface of condenser, the temperature decreased sharply; with heating body temperature of 1000oC, the mean temperature at upper surface of solid Tm was 22oC higher than that on the lower surface, the mean temperature of upper surface of solid Tm was about 32oC lower than that of heating body, and the calculated sublimation velocity was 8.16g/cm2/h, which was only 54.4% of sublimation velocity calculation by heating body temperature.
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| 关 键 词： | vacuum sublimation Tm vapor temperature field numerical simulation |
| 收稿时间： | 19 October 2012 |
Numerical simulation during vacuum sublimation purification of metal Tm (I): model foundation and validation |
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| ZHANG Xiaowei,MIAO Ruiying,CHEN Dehong,WANG Zhiqiang,LI Zongan, YAN Shihong,JIN Xiaoli.Numerical simulation during vacuum sublimation purification of metal Tm (I): model foundation and validation[J].Journal of Rare Earths,2013,31(2):180-185. |
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| Authors: | ZHANG Xiaowei MIAO Ruiying CHEN Dehong WANG Zhiqiang LI Zongan YAN Shihong JIN Xiaoli |
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| Affiliation: | 1. General Research Institute for Nonferrous Metals, Grirem Advanced Materials Co. Ltd., Beijing 100088, China; 2. School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China) |
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| Abstract: | The thermo physical parameters of Tm vapor and the range of sublimation temperature were determined by vapor pressure of metal Tm, and a 2-D axis-symmetric heat transfer model was developed to investigate the temperature distribution in sublimation furnace. The simulation results showed that, due to the heat loss at crucible bottom, the temperature of crucible, solid metal and Tm vapor increased with crucible height increasing, reached the maximum value in the middle of crucible in height direction, and then decreased rapidly; at the outside surface of condenser, the temperature decreased sharply; with heating body temperature of 1000 °C, the mean temperature at upper surface of solid Tm was 22 °C higher than that on the lower surface, the mean temperature of upper surface of solid Tm was about 32 °C lower than that of heating body, and the calculated sublimation velocity was 8.16 g/cm2/h, which was only 54.4% of sublimation velocity calculation by heating body temperature. |
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| Keywords: | vacuum sublimation Tm vapor temperature field numerical simulation |
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