Tin and silver recovery from Coal Creek, AK

Details

• Personal Author:
  Johnson, J. L. ; Parker, T.
• Corporate Authors:
  United States. Bureau of Mines
• Description:
  "The U.S. Bureau of Mines investigated the recovery of tin and silver from the Coal Creek deposit in the Talkeetna Mountains, Alaska. Approximately 5 million st of reserves grading 0.2 pct Sn with silver credits of 0.2 Tr oz/st have been delineated by drilling. A 10- to 25-pct-Sn gravity concentrate was produced by treating the minus 20-mesh ore with a spiral, then regrinding to minus 65 mesh and tabling. Sulfide contamination in the gravity concentrate was as high as 60 pct. Sulfide flotation of this concentrate produced tailings containing 40 to 50 pct Sn. Overall recovery was 76 pct for tin but only 5 to 10 pct for silver because of losses during sulfide flotation. Other methods tested to clean the concentrate included cassiterite flotation, gangue flotation, nitric acid leaching, and wet and dry magnetic separation. Tin beneficiation tests on the minus 325-mesh fraction included cassiterite flotation, vanning, sulfide flotation, and fuming. The bench-scale and locked- cycle tests were used to estimate the mass flows for a 1,000-st/d plant." - NIOSHTIC-2
  
  NIOSH no. 10009152
  
  
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  Alaska ; Alaska -- Chulitna River Region ; OSHA Region 10
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  ii, 21 numbered pages
• NIOSHTIC Number:
  nn:10009152
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:71b12560aba94653e7d16098a8ab0452e007f381f27e27a55801c4801a9d3955f1d781111995c747b722fa14bab8ba03f4058e76fc7c28ad6f02e713bfe89714
• Download URL:
  https://stacks.cdc.gov/view/cdc/10266/cdc_10266_DS1.pdf
• File Type:
  [PDF - 1.77 MB ]