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Lead-zinc Extraction from Concentrates by Electrolytic Oxidation.

Authors
Scheiner-BJ; Lei-KPV; Lindstrom-RE
Source
NTIS: PB 250 494 :13 pages
Link
NIOSHTIC No.
10007610
Abstract
The federal Bureau of Mines investigated an electrolytic oxidation procedure for extracting lead, zinc, copper, and silver from lead- zinc concentrates. Concentrates slurried in brine were pumped through the anode compartment of electrolytic cells equipped with selective ion diaphragms. Hydrochloric and hypochlorous acids generated in the anode compartment converted the metal sulfides in the concentrates to soluble metal chlorides, sulfate ion, and elemental sulfur. Metal extractions of 92 to 100 pct were obtained from lead-zinc concentrates at an energy consumption ranging from 1.5 to 5.0 Kw-hr/lb metal extracted. Sodium hydroxide was formed in the cathode compartment at a current efficiency of >99 pct. Silver and copper were extracted from refractory tetra-hedrite minerals, but the process entailed a relatively high energy consumption. Sealing the top of the diaphragm cell utilized the chlorine more effectively, thereby reducing energy consumption 10 to 50 pct.
Publication Date
19750101
Document Type
IH; Report of Investigation;
Fiscal Year
1975
NTIS Accession No.
PB-250494
NTIS Price
A03
Identifying No.
RI 8092
NIOSH Division
RERC;
Source Name
NTIS: PB 250 494
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