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| Optimization of Stirring Paddle Structure in CaCl2-Ca-CeO2 Molten Salt System |
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Received:October 31, 2017
Revised:November 01, 2017
Accepted:November 02, 2017
Published Online:March 20, 2018
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| DOI：doi：10.3969/j.issn.1007-7545.2018.04.013 |
| KeyWord:CaCl2-Ca-CeO2; molten salt; stirring paddle; structure optimization; numerical calculation |
| Author | Institution |
| WANG Fei |
中核四O四有限公司 |
| CAI Peng |
中核四O四有限公司 |
| ZHANG Hongliang |
中南大学冶金与环境学院 |
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| Abstract: |
| Rare metal cerium with >99% purity can be prepared by reduction of CeO2 in molten CaCl2 system with metal calcium under vacuum environment. The study of multi-phase flow behavior in this reaction process can provide methods for optimization of structure and technological parameters. With CaCl2-Ca-CeO2 molten salt system as research object, the relationship between stirring power density and impeller diameter ratio was studied and established, and multi-phase flow model of molten salt stirring system was established. An optimal stirring impeller structure was obtained by calculating molten salt flow fields with three stirring paddles and several kinds of double stirring paddles, which can provide technical support for industrial preparation of high-purity cerium. |
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