Report of Investigations 8951: Electrochemical Conditioning of a Mineral Particle Bed Electrode for Flotation

Details

• Journal Article:
  Bureau of Mines, Avondale, Maryland. Avondale Research Center
• Personal Author:
  Dewsnap, Noel F. ; Gebhardt, James E. ; Richardson, Paul E.
• Description:
  External control of the electrochemical potential of a bed of mineral particles has been investigated by the Bureau of Mines as a method for controlling particle interaction with organic collectors and thus, flotation response. A cylindrically shaped, 200-300 g. Bed of sulfide mineral particles was used as the working electrode to examine the potential distribution in the bed. The dissolved oxygen concentration of the electrolyte had a significant effect on the potential profile across the mineral bed. Low oxygen levels were necessary to achieve uniform electrochemical potential distributions. Flotation separation of a chalcocite-pyrite mineral mixture by controlled potential was achieved using ethylxanthate, but the flotation behavior of the chalcocite and pyrite from the mixture does not follow the flotation behavior of the individual minerals. That is, the presence of another sulfide mineral alters the flotation behavior with ethylxanthate. Galvanic interaction due to mineral-to-mineral contact between chalcocite and pyrite contributes to differences in the recovery. Chalcocite dissolution products had a deleterious effect on pyrite flotation by activating flotation below -0.1 V (saturated calomel electrode) and depressing flotation above -0.1 V. Pyrite dissolution products had no effect on chalcocite flotation. [Description provided by NIOSH]
• Subjects:
  Minerals Mining Occupational Health Safety
• Keywords:
  Flotation-conditioning; Electrochemistry; Electrodes; Flotation; Sulfide-minerals; Earth-sciences-and-oceanography; Mining-engineering; Mineral-industries
• Source:
  BoM, 1985 :10 pages
• Series:
  NIOSH Numbered Publications   ; Mining Publications  
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  Maryland ; OSHA Region 3
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  AVRC - Avondale Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  15 pdf pages
• NIOSHTIC Number:
  nn:10005669
• NTIS Accession Number:
  PB85-199081
• Federal Fiscal Year:
  1985
• Performing Organization:
  South Australian Inst. of Tech., Adelaide
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:4ad0705fd8630e486cac0d79015829165954487df37ba4014c12497312016db29dfb1eee2a64e35ab5eb9768d55a32d55b5cb90ceb8693003111bff59da0129d
• Download URL:
  https://stacks.cdc.gov/view/cdc/10447/cdc_10447_DS1.pdf
• File Type:
  [PDF - 852.36 KB ]