The Effect of Oxidation on Sulfide Mineral Flotation

Details

• Personal Author:
  Kotlyar, D. G. ; Tolley, William K.
• Description:
  Oxidized sulfide minerals, commonly formed by weathering, increasingly are becoming important resources as primary sulfide deposits are depleted. Oxidation, in general, reduces selectivity and recovery in flotation. The objective of this research was to determine the mechanisms of oxidation and collector adsorption in sulfide systems as a step towards developing improved technologies for beneficiation of oxidized sulfides. Data from microcell flotation tests are combined with electrochemical and spectrophotometric measurements. The adsorption of ethyl xanthate (EX) on oxidized sulfides was characterized using AC impedance techniques and correlated to flotation response. The floatability of chalcocite, chalcopyrite and pyrite was dependent on the extent of oxidation. Oxidation for 1?) d at 65? C inhibited flotation of chalcocite, and chalcopyrite even after the addition of a large amount (1 x 10') M) of collector. Heavily oxidized (27 d) chalcocite remained unfloatable. However, longer oxidation of pyrite and chalcopyrite restored the floatability. Oxidation resulted in an electrically resistive, nonporous surface layer. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Emergencies Heat Stress Disorders Hot Temperature Humidity Mining Occupational Health Safety
• Keywords:
  Minerals Mining-industry Oxides Sulfides
• Series:
  Mining Publications
• Publisher:
  Society for Mining, Metallurgy, and Exploration, Inc.
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Nevada ; OSHA Region 8 ; OSHA Region 9 ; Utah
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  SLRC - Salt Lake City Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-8
• NIOSHTIC Number:
  nn:10003837
• Citation:
  SME Annual Meeting, February 15-18, 1993, Reno, Nevada. Littleton, CO: Society for Mining, Metallurgy, and Exploration, Inc., preprint 93-20, 1993 Feb; :1-8
• Federal Fiscal Year:
  1993
• Peer Reviewed:
  False
• Source Full Name:
  SME Annual Meeting, February 15-18, 1993, Reno, Nevada
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:d1bb288899c9730d24e409904a55ebd934520588d297c08e9970a6e551460e6a5c6231b9fa5a7f8aa2df08e4f2d9950dc9fe88546c149316dc8b51fdc8f2142f
• Download URL:
  https://stacks.cdc.gov/view/cdc/219515/cdc_219515_DS1.pdf
• File Type:
  [PDF - 519.44 KB ]