Report of Investigations 7823: Initial-Stage Sulfuric Acid Leaching Kinetics of Chalcopyrite Using Radiochemical Techniques

Details

• Personal Author:
  Baur, John P. ; Gibbs, Harold L. ; Wadsworth, M. E.
• Corporate Authors:
  United States. Bureau of Mines
• Description:
  The sensitivity of radiochemical techniques makes possible the study of the initial-stage sulfuric acid leaching kinetics of chalcopyrite and other copper sulfide minerals. This Bureau of Mines study of the initial leaching of chalcopyrite used techniques to evaluate the molecular and electrochemical processes. High-grade transvaal chalcopyrite was neutron-irradiated to produce radioisotopes copper- 64, iron-59, and sulfur-35. Dissolution rates were measured in the time interval zero to 60 minutes, during which time significant anomalies were observed. First was an initial period of rapid dissolution lasting a few minutes; second, an arrest or "plateau" region usually lasting from 6 to 10 minutes; third, a second period of dissolution of lesser rate than the first. The effects of solution variables such as ph, oxygen partial pressure, and ferric iron concentration at different temperatures were measured. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety Sulfuric Acids
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• ISSN:
  1066-5552 (print)
• Publisher:
  United States. Bureau of Mines
• Document Type:
  Text
• Genre:
  Case Report
• Rights:
  Public Domain
• 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:
  44 pdf pages
• Contributor:
  Kraker, Pat ; Brickner, Moran
• NIOSHTIC Number:
  nn:10009097
• NTIS Accession Number:
  PB-228628
• Citation:
  NTIS: PB 228 628 :38 pages
• Federal Fiscal Year:
  1974
• Peer Reviewed:
  False
• Source Full Name:
  NTIS: PB 228 628
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:e715049db3c3759f77109fc960fb2765476c20b604fb9beecb6e351e89965605f9907220ca3da21ba4522a9a2e1b55b0152f8d46d9a8e43ca63baa60500c88c0
• Download URL:
  https://stacks.cdc.gov/view/cdc/201965/cdc_201965_DS1.pdf
• File Type:
  [PDF - 1.70 MB ]