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Electrolytic Cleaning and Conditioning of Gold Redox Probes in Flotation Circuits.

PB94173333

Publication Date	1994
Personal Author	Tolley, W. K.; Rice, D. A.
Page Count	22
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	Mineral industry Electrochemical cleaning Electrodes Flotation Anodic polarization Scale(Corrosion) Redox potentials Noble metals Gold Mining engineering Electrolysis Molybdenum ores Slurries Photomicrographs Scanning electron microscopy Beneficiation Potentiostatic cleaning Gold redox electrodes Potentiodynamic conditioning
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 99F - Physical & Theoretical Chemistry
Corporate Authors	Bureau of Mines, Salt Lake City, UT. Salt Lake City Research Center.
Supplemental Notes	See also PB85-199081.
Document Type	Technical Report
Title Note	Rept. of investigations/1994.
NTIS Issue Number	199417

Electrolytic Cleaning and Conditioning of Gold Redox Probes in Flotation Circuits.

Electrolytic Cleaning and Conditioning of Gold Redox Probes in Flotation Circuits.
PB94173333

Publication Date	1994
Personal Author	Tolley, W. K.; Rice, D. A.
Page Count	22
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	Mineral industry Electrochemical cleaning Electrodes Flotation Anodic polarization Scale(Corrosion) Redox potentials Noble metals Gold Mining engineering Electrolysis Molybdenum ores Slurries Photomicrographs Scanning electron microscopy Beneficiation Potentiostatic cleaning Gold redox electrodes Potentiodynamic conditioning
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 99F - Physical & Theoretical Chemistry
Corporate Authors	Bureau of Mines, Salt Lake City, UT. Salt Lake City Research Center.
Supplemental Notes	See also PB85-199081.
Document Type	Technical Report
Title Note	Rept. of investigations/1994.
NTIS Issue Number	199417