Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Recovery of Mercury from Cinnabar Ores by Electrooxidation-- extraction Plant Amenability Tests.

Authors
Sh-ES; Scheiner-BJ; Lindstrom-RE
Source
NTIS: PB 247 157 :13 pages
Link
NIOSHTIC No.
10007601
Abstract
Amenability studies were conducted by the federal Bureau of Mines on an electrooxidation technique for the extraction of mercury from cinnabar ores, particularly those that are too low in grade to be furnaced or retorted economically. Oxidation was accomplished by electrolysis of the ore while slurried with brine. Mercury was dissolved through the formation of the soluble tetrachloro mercury complex, hgcl4 2-. Mercury extractions ranged from 90 to 98 percent in 4 to 6 hours of processing time when tests were made on eight different types of cinnabar ores containing from 0.7 to 18 pounds mercury per ton ore. Salt concentration was varied from 4 to 10 weight-percent depending on whether pbo2 anodes and iron cathodes were used or whether graphite was used for both electrodes. Power consumption ranged from 17 to 64 kilowatt-hours per ton of ore treated. Ninety-nine percent of the mercury was recovered from pregnant solutions by precipitation on an active metal such as zinc, followed by distillation of the resulting amalgam at 600 deg c.
Publication Date
19750101
Document Type
IH; Report of Investigation;
Fiscal Year
1975
NTIS Accession No.
PB-247157
NTIS Price
A03
Identifying No.
RI 8083
NIOSH Division
RERC;
Source Name
NTIS: PB 247 157
TOP