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| Study on the electrocrystallisation of Zr(IV) in NaCl-KCl- K2ZrF6molten salt |
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Received:March 29, 2019
Revised:June 14, 2019
Accepted:June 24, 2019
Published Online:December 24, 2019
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| DOI： |
| KeyWord:zirconium; chronoamperometry; molten salt electro-refining; electrocrystallisation; |
| Author | Institution |
| WU Yan-ke |
Rare metal metallurgy and Materials Research Institute,GRIMAT Engineering Institute Co.,Ltd. |
| JIANG Hong-lin |
Rare metal metallurgy and Materials Research Institute,GRIMAT Engineering Institute Co.,Ltd. |
| Chen song |
Rare metal metallurgy and Materials Research Institute,GRIMAT Engineering Institute Co.,Ltd. |
| CAI Zhen-ping |
Rare metal metallurgy and Materials Research Institute,GRIMAT Engineering Institute Co.,Ltd. |
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| Abstract: |
| Molten salt electrorefining is an important method for spent fuel reprocessing. The study of electrodeposition and crystallization mechanism is of great significance for recovering U, Zr metals respectively. In three-electrode system, platinum wire was used as research electrode, pyrolytic graphite crucible as auxiliary electrode, Ag/AgCl as reference electrode, and cyclic voltammetry and chronoamperometry were used to study the process. The electrochemical nucleation of zirconium in NaCl-KCl-K2ZrF6 molten salt at 1023 K was investigated by chronoamperometry. Electrochemical theory analysis and the micro-morphology analysis of the potentiostatic electrolysis product of zirconium nuclei in the process of growing up showed that the growth mode of zirconium nuclei was three-dimensional hemispherical spiral growth limited by the diffusion of the zirconium complex ions. |
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