Increasing the Leaching Rate of Bulk Superalloy Scrap By Melting with Aluminum

Details

• Personal Author:
  Atkinson, Gary B.
• Description:
  The Bureau of Mines investigated a method for increasing the leaching rate of bulk superalloy scrap to facilitate recycling and recovery of critical metals such as ni, CO, and cr. Three superalloys were investigated, the cast-nickel-base superalloy in- 738, the wrought-nickel-base superalloy rene-41, and the cast-cobalt- base superalloy mar-m-509. Superalloys melted with 20,30,40, and 50 pct al metal to form intermetallic compounds were easily crushed to a convenient particle size and reacted rapidly with acid solutions which dissolved the metals. For example, leaching 1/2-in pieces of unalloyed in-738 with excess 6n hcl at 95 deg c for 2 h dissolved about 0.5 pct, while leaching 10 g of minus 20-mesh 30 pct al-70 pct in-738 with excess 6n hcl at 95 deg c for 2 h dissolved 96.2 pct. [Description provided by NIOSH]
• Content Notes:
  in NTRL, no pdf
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Conference Publications
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  RERC - Reno Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-11
• NIOSHTIC Number:
  nn:10003232
• Citation:
  NTIS: PB84/152156; :1-11
• Federal Fiscal Year:
  1983
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7dc847c09aedf140bc731323e8446b4703641ae07d6ad9e7b7238120dab30b8f7dcaa9b938d34d035f87873a0fe7fec262d5d13dcaf290925445e82b6de3b57d
• Download URL:
  https://stacks.cdc.gov/view/cdc/236668/cdc_236668_DS1.pdf
• File Type:
  [PDF - 168.02 KB ]