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Investigation of a Cell Design for Electrowinning Zirconium Metal from Zirconium Tetrachloride.

Authors
Martinez-GM; Shanks-DE; Woodyard-JR; Wong-MM
Source
NTIS: PB 252 503 :12 pages
Link
NIOSHTIC No.
10007759
Abstract
A cell concept adaptable to large-scale electrowinning of zirconium metal from zirconium tetrachloride was investigated by the federal Bureau of Mines. Tests were made in twin cells, each 12 inches in diameter by 33 inches long. Electrowinning was performed in one chamber from which the electrolyte was transferred after electrolysis to the other chamber where it was renewed by the introduction of zrcl4 by direct sublimation. The formation of a salt plug in the connecting pipe provided a seal between the chambers. Optimum electrolyte composition, with respect to quality of the metal product (91 pct meeting ASTM standards except for the oxygen content) and current-carrying capability (about 350 amp) was determined to be 16.7 wt-pct naf-83.3 wt-pct nacl mixture plus zrcl4 equal to about 3 wt-pct zirconium. A twin-cell design incorporating the unit operations covered by this investigation is proposed.
Publication Date
19760101
Document Type
IH; Report of Investigation;
Fiscal Year
1976
NTIS Accession No.
PB-252503
NTIS Price
A03
Identifying No.
RI 8125
NIOSH Division
RERC;
Source Name
NTIS: PB 252 503
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