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| Preparation of high purity calcium by vacuum distillation |
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Received:June 16, 2014
Revised:June 25, 2014
Accepted:June 26, 2014
Published Online:August 10, 2015
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| DOI： |
| KeyWord:calcium metal; purification; apparatus; vacuum distillation; |
| Author | Institution |
| Huzhifang |
Division of Rare Metal Materials and Metallurgy, General Research Institute for Non-ferrous Metals |
| Yanghong |
The 404 Ltd., CNNC, Lanzhou |
| Lizhongqi |
Division of Rare Metal Materials and Metallurgy, General Research Institute for Non-ferrous Metals |
| Shixinquan |
The 404 Ltd., CNNC |
| Jianghonglin |
Division of Rare Metal Materials and Metallurgy, General Research Institute for Non-ferrous Metals |
| Yinyanxi |
Division of Rare Metal Materials and Metallurgy, General Research Institute for Non-ferrous Metals |
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| Abstract: |
| In this paper, the main factors, such as the distillation temperature, the vacuum and the condensing temperature were calculated in details. According to the theory analysis, the process parameters were determined. The distillation device was designed and fabricated by-self. The influence of the device material on purification of calcium by vacuum distillation was studied. The results showed that, it was effectively to prevent the products from being polluted by the materials of the distillation apparatus through electroplating chromium on the inner wall of the device. And, on the basis of the pre-research, after one-step distillation, the calcium content could be about 99.99%, the actively calcium content could reach 99.50%, and the impurities gases contents of the product were as followed, C and N content was both lower than 0.002%, and O content was 0.012%. |
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