Removal of Leachable Metals and Recovery of Alumina from Utility Coal Ash

Details

• Personal Author:
  Gabler, Robert C. Jr. ; Stoll RL
• Description:
  The extraction of metals from coal ash was investigated by the Bureau of Mines in an effort to produce a more environmentally acceptable waste and offset waste disposal costs with recovered metal values. The research was conducted in two steps: determination of the parameters that affect extraction of metals from coal ash and development of extraction-recovery procedures. Data obtained indicate that the major parameter affecting the extraction of metals from coal ash is the calcium content of the ash. Other parameters such as furnace type and operating temperature had much smaller effects on metal extraction. Two procedures were studied for metal extraction: an acid leach procedure for high-calcium ashes and a lime sinter-acid leach procedure for low-calcium ashes. An alumina product was recovered that, with sufficient washing, meets hall cell specifications. The leach residues pass the EPA ep toxicity test and are thus nonhazardous wastes available for a variety of uses. [Description provided by NIOSH]
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Conference Publications ; Case 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:
  1-20
• NIOSHTIC Number:
  nn:10002701
• Citation:
  Avondale, MD: U.S. Department of the Interior, Bureau of Mines, RI 8721, 1983 Jan; :1-20
• Federal Fiscal Year:
  1983
• Peer Reviewed:
  False
• Source Full Name:
  Avondale, MD: U.S. Department of the Interior, Bureau of Mines, RI 8721
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:742abb11a6389cf5d8751b9c9255bbec8b1463fc7910d4b7b44339129438aab66c7113c0614ffd70d9a3fcf019c0fc254848a9b341bceee8496c2388cf10b16a
• Download URL:
  https://stacks.cdc.gov/view/cdc/237686/cdc_237686_DS1.pdf
• File Type:
  [PDF - 8.51 MB ]