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Extraction of Molybdenum and Rhenium from Concentrates by Electrooxidation.

Authors
Lindstrom-RE; Scheiner-BJ
Source
NTIS: PB 225 345 :12 pages
Link
NIOSHTIC No.
10009070
Abstract
Electrooxidation techniques were investigated on a bench scale by the Bureau of Mines to determine the applicability of the process for extracting molybdenum and rhenium from low-grade molybdenite concentrates. Parameters affecting the extraction, such as pulp density, power consumption, reagent requirements for ph control, and electrolytic cell configuration, were studied. Molybdenum and rhenium extractions of 98 to 99 percent were achieved from several concentrates containing 4.76 to 28.6 percent molybdenum and 180 ppm to 1,000 ppm rhenium. Optimum results were obtained by maintaining ph values between 5.5 and 7.0 During electrolysis and allowing the final ph to rise to about 8.2. Reagent consumption was 4 to 6 pounds of sodium carbonate per pound of molybdenum extracted. The power consumption declined from a range of 12 to 25 kilowatt-hours per pound of molybdenum extracted with immersion electrodes to 9.7 Kilowatt-hours with a bipolar flow-through cell; however, molybdenum extraction was independent of cell configuration.
Publication Date
19730101
Document Type
IH; Report of Investigation;
Fiscal Year
1973
NTIS Accession No.
PB-225345
NTIS Price
A03
Identifying No.
RI 7802
NIOSH Division
RERC;
Source Name
NTIS: PB 225 345
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