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| Strontium Preparation with Vacuum Silicothermic Reduction Process |
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Received:December 29, 2011
Revised:December 29, 2011
Accepted:December 31, 2011
Published Online:June 26, 2012
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| DOI：10.3969/j.issn.1007-7545.2012.07.015 |
| KeyWord:vacuum silicothermic reduction; strontium; process |
| Author | Institution |
| Zou-xingwu |
中科院青海盐湖研究所 西宁 中国科学院研究生院 北京 |
| Wang-Shuxuan |
中科院青海盐湖研究所 西宁 |
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| Abstract: |
| Metal strontium with purity of 98%~99% was prepared by vacuum silicothermic reduction process. The effects of reduction temperature, holding time, briquetting pressure, ferrosilicon excess coefficient, and reactant particle size on strontium reduction rate were studied. The results show that strontium reduction rate of 57% can be achieved under the following optimum conditions including vacuum degree of 0~100 Pa, ferrosilicon excess coefficient of 30%, briquetting pressure of 30 MPa, reduction temperature of 1 250 ℃, and holding time of 2.5 h. The XRD and XRF analysis shows that the phases of residue are 2SrO?SiO2 and SrO?SiO2 mixture, and the 2SrO?SiO2 accounts for the majority. |
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