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Electrokinetic Consolidation of Slimes in an Underground Mine.

Authors
Sprute-RH; Kelsh-DJ
Source
NTIS: PB 262 737 :30 pages
Link
NIOSHTIC No.
10000988
Abstract
The federal Bureau of Mines conducted full-scale field tests in electrokinetic dewatering and consolidation of slimes in cooperation with the Hecla Mining Company at two of the firm's underground mines in north Idaho. To test the technique on new deposits, 4,000 ft3 of slimes from a collection sump, pumped into a watertight stope equipped with electrodes, were treated in two steps. Immediately after placement, direct current was applied using a floating electrode to hasten settlement of suspended fine particles. After removal of clarified water, the residue was further dewatered and hardened with electrokinetic treatment. In 25 hours, the material had become firm and dense with a surface capable of supporting workmen. In testing old deposits, 10,000 ft3 of slimes, placed in an unused tail drift 10 to 12 months previously, were treated. This material was sufficiently consolidated by electrokinetics to allow its removal from the mine with standard ore-handling equipment. In both tests, electrokinetic treatment densified slimes in a relatively short time with moderate power consumption.
Publication Date
19760101
Document Type
IH; Report of Investigations
Fiscal Year
1976
NTIS Accession No.
PB-262737
NTIS Price
A03
Identifying No.
RI 8190
NIOSH Division
SRC;
Source Name
NTIS: PB 262 737
State
ID;
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