Fine Coal-Refuse Slurry Dewatering

Details

• Personal Author:
  Backer, Ronald R. ; Busch, Richard A.
• Description:
  The Bureau of Mines, in cooperation with Washington Irrigation and Development Company (Widco), evaluated the dewatering of fine coal-refuse slurry using chemicals and various types and combinations of drains in natural earth impoundments. About 40 lb of lime and 2 lb of polymer per ton of dry solids were mixed with the underflow from the preparation-plant thickener. Clear, free water was immediately liberated from the slurry. The percent solids by weight of the slurry increased from about 17 to 30 immediately, and after 5 days increased to 45 wt-pct. This indicates a threefold reduction in total volume after 5 days from 172 cu ft/ton solids originally to 56 cu ft/ton solids. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Mining Occupational Health Polymers Safety
• Keywords:
  Mining industry; Coal mining; Refuse collection; Waste treatment; Waste disposal; Solid waste; Solid waste disposal; Environmental engineering; Lime; Polymers
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Conference Publications ; Case Report
• Place as Subject:
  OSHA Region 10 ; Washington
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  SRC - Spokane Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-18
• NIOSHTIC Number:
  nn:10006748
• CAS Registry Number:
  Calcium oxide (CAS RN 1305-78-8)
• Federal Fiscal Year:
  1981
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:45e96f4bb1366e6d5d998f3d10fd0bdb5369fdc929be55e91e229299eb4237691d698f6382c25d6222467d860919429108c2b06d790890847b7bb5a28ec6209b
• Download URL:
  https://stacks.cdc.gov/view/cdc/237193/cdc_237193_DS1.pdf
• File Type:
  [PDF - 2.92 MB ]