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Electrolytic cleaning and conditioning of gold redox probes in flotation circuits.
Salt Lake City, UT: U.S. Department of the Interior, Bureau of Mines, RI 9496, 1994 Jan; :1-7
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.
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
Report of Investigations
NTIS Accession No.
Salt Lake City, UT: U.S. Department of the Interior, Bureau of Mines, RI 9496
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division