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THE BEHAVIOR OF HAFNIUM DURING THE ELECTROLYTIC PREPARATION OF ZIRCONIUM FROM A CHLORIDE-FLUORIDE FUSED SALT MELT (in Russian)

Journal Article · · Tsvetn. Metal.
OSTI ID:4097161
;
An equimolecular mixture of NaCl and KCl was placed in an electrolyzer, and then, potassium fluorozirconate conLaining 32.9 wt% Zr 1.4 wt % Hf, and 41.8 wt % F was added to the vessel. The effect of fluoride ion, temperature, current density, and concentration of fluorozirconate in the bath on the separation of Zr and Hf was determined. Increasing the fluoride concentration in the bath from 12 to 19 wt % (from 6 to 13 g-ion F/g-ion Zr) led to an increase of Hf in Zr by a factor of 2. Hence, electrolysis in a choride bath would lead to better separation of Zr and Hf. The content of Hf in the Zr metal decreased from 0.47 wt % to 0.23 wt % on increasing the Zr concentration in the bath from 6 to 15 wt%. The amount of Hf in the Zr metal decreased from 0.35 to 0.12 wt% on decreasing the cathode current density from 4.0 to 0.2 amps/cm/sup 2/. The content of Hf in the Zr metal decreased with increasing temperature. Complex double salts of Zr covered the surface of the Zr metal, and prevented further separation of Zr from Hf. (TTT)
Research Organization:
Originating Research Org. not identified
NSA Number:
NSA-18-008457
OSTI ID:
4097161
Journal Information:
Tsvetn. Metal., Journal Name: Tsvetn. Metal. Vol. Vol: No. 9
Country of Publication:
Country unknown/Code not available
Language:
Russian

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Related Subjects

ANIONS
CATIONS
CHEMISTRY
CHLORIDES
CURRENTS
DIAGRAMS
EFFICIENCY
ELECTROCHEMISTRY
ELECTRODES
ELECTROLYSIS
ELECTROLYTES
ELECTROLYTIC CELLS
FLUORIDES
FLUORINE
FUSED SALTS
HAFNIUM
HAFNIUM COMPOUNDS
HAFNIUM FLUORIDES
HIGH TEMPERATURE
IMPURITIES
IONS
MEASURED VALUES
METALLURGY
METALS
MIXING
PERFORMANCE
POTASSIUM CHLORIDES
POTASSIUM FLUORIDES
PRECIPITATION
QUANTITY RATIO
REFINING
SEPARATION PROCESSES
SODIUM CHLORIDES
SURFACES
TABLES
TEMPERATURE
VARIATIONS
ZIRCONIUM
ZIRCONIUM COMPLEXES
ZIRCONIUM COMPOUNDS
ZIRCONIUM FLUORIDES