| 摘要 |
PROBLEM TO BE SOLVED: To perform electrolysis under a low electrolytic voltage by reducing the liquid resistance of an electrolytic solution so as to obtain high purity zinc, and to miniaturize electrolytic equipment at a high current density. SOLUTION: In the method of producing high purity zinc, zinc chloride is used as the raw material, an electrolytic cell having a zinc melt storage at the bottom and having a produced gas capture function at the upper part is used, an alkali metal chloride is added as a supporting electrolyte, melting is performed, electrolysis is performed by molten salt electrolysis, chlorine is discharged in a gaseous state from the upper part of the electrolytic cell, zinc is discharged as a fused body from the lower part of the electrolytic cell, the fused zinc is transferred to a distillation apparatus, thereafter, high purity zinc is obtained by distillation, and further, distillation residue is returned to the electrolytic cell. Thus, the intrusion of the supporting electrolyte into zinc as an electrolytic product is eliminated to obtain high purity zinc. COPYRIGHT: (C)2004,JPO&NCIPI
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