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| The thermodynamic and process of preparation of high purity calcium by vacuum distillation |
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Received:April 03, 2013
Revised:September 16, 2013
Accepted:April 09, 2013
Published Online:December 21, 2013
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| DOI： |
| KeyWord:high purity calcium; purification; vacuum distillation; thermodynamic; |
| Author | Institution |
| Hu Zhifang |
General Research Institute for Non-Ferrous Metals |
| Yin Yanxi |
Division of Rare#$NBSMetal Materials and Metallurgy,General Research Institute for Non-Ferrous Metals;China |
| Wang Xin |
Division of Rare#$NBSMetal Materials and Metallurgy,General Research Institute for Non-Ferrous Metals;China |
| Tian Lisen |
Division of Rare#$NBSMetal Materials and Metallurgy,General Research Institute for Non-Ferrous Metals;China |
| Jiang Honglin |
Division of Rare#$NBSMetal Materials and Metallurgy,General Research Institute for Non-Ferrous Metals;China |
| Wang Lijun |
Division of Rare#$NBSMetal Materials and Metallurgy,General Research Institute for Non-Ferrous Metals;China |
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| Abstract: |
| In this paper, the thermodynamics and dynamics of the preparation of high purity calcium by vacuum distillation are calculated in detail. The pre-distillation and distillation process are studied to determine the optimized process of preparation of high purity calcium by vacuum distillation. The pre-distillation and distillation parameters are respectively 700 ℃, 40 minutes. and 850 ℃, 60 minutes. It is effective to prevent the vacuum distillation products be polluted by electroplated Cr on the inner wall of the distillation unit. The 99.998% high purity calcium can be obtained by the vacuum distillation once. |
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