A study of the iodide process of refining zirconium

Emel'yanov, V. S.; Bysttov, P. D.; Evstyukhin, A.I.

doi:10.1007/bf01514510

Cited by 1 publication

(2 citation statements)

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“…The preparation methods of zirconium and hafnium mainly include the Kroll method, the molten salt electrolysis method, and the metal thermal reduction method [ 4 , 5 , 6 , 7 ]. The purification methods include the molten salt electrolytic refining method, the iodization method, and the electron beam melting method [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…The molten salt electrolyte system mainly includes a fluoride system, a fluoride–chloride system, and a chloride system [ 8 ]. In the fluoride system, the morphological feature of the deposited Zr is found to be powdery by electrolytic refining processes such as LiF-NaF-ZrF 4 [ 9 , 10 ] and LiF-KF-ZrF 4 [ 11 ]. In the fluoride–chloride system, powdery Zr deposits are known to be produced in LiCl-KCl-LiF-ZrCl 4 [ 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Application of a NaCl-KCl-CsCl-Cs2ZrCl6 Composite Electrolyte

Zou

Wang

et al. 2023

Materials

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Using ternary molten salt with a molar ratio of NaCl:KCl:CsCl = 30:24.5:45.5 and ZrCl4 as raw materials to prepare a NaCl-KCl-CsCl-Cs2ZrCl6 composite electrolyte. Characterizing by XRD, ICP-AES, optical microscopy and SEM-EDS, the results showed that when the molar ratio of CsCl:ZrCl4 ≥ 2:1, Cs2ZrCl6 was generated according to the stoichiometric reaction; when the molar ratio of CsCl:ZrCl4 < 2:1, CsCl in molten salt was almost completely converted to Cs2ZrCl6, and there was a ZrCl4 phase. When the molar ratio of CsCl:ZrCl4 = 2:1, with the increase of the reaction temperature and reaction time, the concentration of zirconium ions first increased and then decreased. The optimized preparation process conditions are: the 2:1 molar ratio of CsCl to ZrCl4 in NaCl-KCl-CsCl, 500 °C of reaction temperature of and 3 h of reaction time. Under this condition, 99.68% conversion rate from ZrCl4 to Cs2ZrCl6 was obtained. Taking the prepared NaCl-KCl-CsCl-Cs2ZrCl6 composite electrolyte as a raw material, a preliminary study of molten salt electrolytic refining zirconium was carried out, and a refined zirconium product with a dendrite of 10.61 mm was obtained under the conditions of a zirconium ions concentration of 5%, an electrolysis temperature of 750 °C, a current density of 0.1 A/cm2, and an electrolysis time of 9 h, indicating that the composite electrolyte can be used for the electrolytic refining of zirconium.

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