Report of Investigations 9556: Effect of Additives on Chalcopyrite Leaching

Details

• Journal Article:
  Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9556
• Personal Author:
  Bush, R. P. ; Sandoval, Scot P. ; Schultze, Lawrence E.
• Description:
  Experiments were conducted by the U.S. Bureau of Mines to verify enhancements due to chloride and surfactant additions in the leaching system of chalcopyrite with ferric sulfate and sulfuric acid. A statistical experimental design was used and equipment was designed to eliminate contributions from changes in solution electrochemical potential during the course of the measurements. Results confirmed that chloride additions increased chalcopyrite leaching by as much as 94 pct over the electrochemical potential versus hydrogen electrode range of 630 to 750 mV at pH 1.7 and 50 EC. Total iron concentration had no effect over the range of 1 to 5 g/L. The effect of surfactant addition was less well defined. While additions of LA 790 (a polyoxyethylene lauryl ether) resulted in increased copper leaching in several of the tests, the differences were too small to be statistically significant. No interaction effect could be verified. [Description provided by NIOSH]
• Subjects:
  Environmental Exposure Environmental Pollution Laboratories Mining Occupational Health Safety
• Keywords:
  Electrochemical-analysis; Electrochemical-reactions; Electrochemistry; Laboratory-testing; Electrolytic-refining; Environmental-pollution; Environmental-contamination
• Source:
  Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9556, 1995 Jan; :1-7
• Series:
  NIOSH Numbered Publications   ; Mining Publications  
• Subseries:
  Report of Investigations
• ISSN:
  1066-5552
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  Nevada ; OSHA Region 9
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  RERC - Reno Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  13 pdf pages
• NIOSHTIC Number:
  nn:20023150
• NTIS Accession Number:
  PB95-219895
• CAS Registry Number:
  Chalcopyrite (CuFeS2) (CAS RN 1308-56-1) ; Copper sulfide (CuS) (CAS RN 1317-40-4) ; Cupric chloride (CAS RN 7447-39-4) ; Ferric sulfate (CAS RN 10028-22-5) ; Potassium chloride (CAS RN 7447-40-7) ; Sulfur (CAS RN 7704-34-9) ; Sulfuric acid (CAS RN 7664-93-9)
• Federal Fiscal Year:
  1995
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:079e1858a9bbc8e06211a4c65cd8c5604d57b5b2e6825cedbfb9e34951fee1557ba5abd44e1a7bae42c28aa25c450e84f0431373118da813f80f551697a61446
• Download URL:
  https://stacks.cdc.gov/view/cdc/10101/cdc_10101_DS1.pdf
• File Type:
  [PDF - 817.56 KB ]