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Electrolytic cleaning and conditioning of gold redox probes in flotation circuits.

Authors
Tolley-WK; Rice-DA
Source
Salt Lake City, UT: U.S. Department of the Interior, Bureau of Mines, RI 9496, 1994 Jan; :1-7
Link
NIOSHTIC No.
10005129
Abstract
The U.S. Bureau of Mines (USBM) is currently investigating the electrochemistry of mineral flotation. A significant need in this area is greater reliability of sensors. The USBM is testing electrolytic methods to clean and condition redox-sensing electrodes to improve the reliability and extend the service life of these instruments in the harsh physical and chemical environment of mineral processing slurries. A novel method for removing scale from fouled electrodes has been developed that includes anodic polarization to 1.2 V versus the Ag/AgCl reference potential, followed by brief potentiodynamic conditioning. Laboratory results show that this technique removes calcarious deposits from gold sensing electrodes and returns the electrodes to useful service within approximately 10 min. Mechanical abrasion to remove the scale is thereby avoided.
Keywords
Anodic-polarization; Scale-corrosion; Redox-potentials; Noble-metals; Mining-engineering; Electrolysis; Molybdenum-ores; Slurries; Photomicrographs; Scanning-electron-microscopy; Mineral-industry; Electrochemical-cleaning; Electrodes; Flotation; Potentiostatic-cleaning; Gold-redox-electrodes; Potentiodynamic-conditioning; Mineral-industries
Publication Date
19940101
Document Type
Report of Investigations
Fiscal Year
1994
NTIS Accession No.
PB94-173333
NTIS Price
A03
Identifying No.
RI-9496
NIOSH Division
SLRC
Source Name
Salt Lake City, UT: U.S. Department of the Interior, Bureau of Mines, RI 9496
State
UT
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