Report of Investigations 8788: Distribution and Analyses of Gold and Silver in Mechanically Processed Mixed Electronic Scrap

Details

• Journal Article:
  U.S. Bureau of Mines
• Personal Author:
  Ambrose, Fred ; Dunning, Beverly W. Jr. ; Makar, Harry V.
• Description:
  The Bureau of Mines investigated the concentration and distribution of precious metals in the various fractions produced from mechanical processing of obsolete military electronic scrap. Whole avionic units, printed circuit cards, and electrical connectors were processed and analyzed. Materials recovered included baghouse lights, wire bundles, magnetics, and metal concentrates from eddy- current and high-tension separation. Higher value fractions were processed by a commercial toll refiner for recovery of gold and silver. Lower value fractions were analyzed by the Bureau. Three fractions, the lights, wire bundles, and metallics from high-tension separation, contained most of the precious metals. Depending on the type of scrap feed, these fractions represented 34 to 60 pct of the original sample weight. Collectively, they represented 68 to 97 pct and 75 to 98 pct of the contained gold and silver, respectively. [Description provided by NIOSH]
• Subjects:
  Electrical Equipment And Supplies Metals Occupational Health Safety Waste Management
• Keywords:
  Waste-treatment; Electronic-equipment; Electronic-components; Electronic-circuits; Metal-compounds; Metallurgical-processes; Metallurgy
• Source:
  USBM 1983 Jan; :1-17
• 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:
  22 pdf pages
• NIOSHTIC Number:
  nn:10002971
• NTIS Accession Number:
  PB83-250092
• Federal Fiscal Year:
  1983
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:9bb048ee02b58b1b27f5a17bdc2eb15f8fd2f0fd0e3126df40df7321f40657de6464065a8ebf2f5b7420d5cd33cf3d0308f5ad2d68d7880078eb33be8826a267
• Download URL:
  https://stacks.cdc.gov/view/cdc/10417/cdc_10417_DS1.pdf
• File Type:
  [PDF - 5.95 MB ]