Report of Investigations 9442: Dewatering of Alaska Placer Effluent using PEO

Details

• Journal Article:
  Tuscaloosa, AL: U.S. Department of the Interior, Bureau of Mines, RI 9442
• Personal Author:
  Scheiner, Bernard J. ; Sharma, Sandeep K. ; Smelley, Annie G. ; Scheiner, Bernard J. ; Sharma, Sandeep K. ; Smelley, Annie G.
• Description:
  The U.S. Bureau of Mines has been investigating new techniques to improve the dewatering of mineral slurries, to recover water lost in the waste slurry, and to produce dewatered solids suitable for disposal. As part of this investigation, a study was undertaken to investigate the feasibility of dewatering Alaska placer effluent. Based on the laboratory tests, preliminary field tests were conducted on three placer mines in Alaska. At these mines, the water recovered from the placer effluent (250 to 23,000 NTU) exhibited turbidities of 20 to 240 NTU. In the second year of the project, a large-scale dewatering unit was set up at a mine located in the Livengood District. The feed, at flow rates up to 935 gpm, was mixed with dilute PEO solution in a flexible plastic hose with and without static mixers. Feed to the dewatering unit generally ranged between 300 and 26,500 NTU and required PEO dosages of 0.02 to 0.14 lb per 1,000 gal to produce water from the screen underflow with turbidities of 20 to 50 NTU. During this period, a small unit was also operated at flow rates of 10 to 25 gpm at seven sites throughout Alaska, with the effluent from four of the sites being dewatered successfully. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Mining Occupational Health Safety
• Keywords:
  Mining-industry; Waste-treatment; Waste-disposal; Mineral-processing
• Source:
  Tuscaloosa, AL: U.S. Department of the Interior, Bureau of Mines, RI 9442, 1992 Jan; :1-10 ; Tuscaloosa, AL: U.S. Department of the Interior, Bureau of Mines, RI 9442, 1992 Jan; :1-10
• Series:
  NIOSH Numbered Publications   ; Mining Publications   ; NIOSH Numbered Publications   ; Mining Publications  
• Subseries:
  Report of Investigations ; Report of Investigations
• Document Type:
  Text
• Genre:
  Report ; Report
• Place as Subject:
  Alaska ; OSHA Region 10
• CIO:
  National Institute for Occupational Safety and Health (NIOSH) ; National Institute for Occupational Safety and Health (NIOSH)
• Division:
  TURC - Tuscaloosa Research Center ; TURC - Tuscaloosa Research Center
• Topic:
  Workplace Safety & Health ; Workplace Safety & Health
• Location:
  North America ; North America
• Pages in Document:
  16 pdf pages
• NIOSHTIC Number:
  nn:10011619
• NTIS Accession Number:
  PB93-136513
• Federal Fiscal Year:
  1992
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:fc30f1e783b15d1d585cb328bb9db8d59a3140dd949b7075f31c11c7659718e41718124c8887dd5b092cdb6659311c52ce796d1fa436eb3bddf198964a1039b8
• Download URL:
  https://stacks.cdc.gov/view/cdc/10095/cdc_10095_DS1.pdf
• File Type:
  [PDF - 1.15 MB ]