Report of Investigations 8296: Preconcentration of Native Copper Ore by Electronic Sorting

Details

• Personal Author:
  Miller, Vernon R. ; Nash, Robert W. ; Schwaneke, Alfred E.
• Corporate Authors:
  United States. Bureau of Mines
• Description:
  The Bureau of Mines developed and evaluated a detecting and sorting device to separate the copper-bearing portion from the barren portion of Michigan native copper ore in the minus 4- plus 1-inch size range. Small-scale sorting tests were also conducted on minus 1- plus 1/2-inch material from the Centennial No. 6 Mine, using a previously developed system that was modified to increase sensitivity. Results showed that, with the added sensitivity, 85 to 90 pct of the copper in the minus 1- plus 1/2-inch material could be recovered in about 50 to 60 pct of the fraction. Sorting tests on minus 4- plus 2-inch and minus 2- plus 1-inch fractions from the Centennial Mine were conducted with the large sorting system. Results showed that 86 to 93 pct of the copper was recovered in 43 to 64 wt-pct of the sorted fractions. Combining of concentrates from the two fractions resulted in a recovery of 90 pct of the copper in 55 pct of the weights. The composite concentrate contained 2.40 pct cu, and the tailing analyzed 0.33 pct cu; the head sample assayed 1.46 pct cu. [Description provided by NIOSH]
• Subjects:
  Copper Metals Mining Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• ISSN:
  1066-5552 (print)
• Publisher:
  United States. Bureau of Mines
• Document Type:
  Text
• Genre:
  Case Report
• Place as Subject:
  Michigan ; OSHA Region 5
• Rights:
  Public Domain
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  RORC - Rolla Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  20 pdf pages
• NIOSHTIC Number:
  nn:10007849
• NTIS Accession Number:
  PB-285204
• Citation:
  NTIS: PB 285 204 :12 pages
• Federal Fiscal Year:
  1978
• Peer Reviewed:
  False
• Source Full Name:
  NTIS: PB 285 204
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:1c2fd54a121f14bb287bb7ed5af2ad2d38a4a8e8281900fbdd51f19ea806d73bc27aa4a7559033300ffda84503c4ed627a1825aa005b9a45ef3b1260885be0de
• Download URL:
  https://stacks.cdc.gov/view/cdc/201874/cdc_201874_DS1.pdf
• File Type:
  [PDF - 413.15 KB ]