Phosphorus Removal from Birmingham, Ala., Calcareous Iron Ores

Details

• Personal Author:
  Feld IL ; Lamont, W. E. ; McVay TN ; Spruiell CE Jr.
• Description:
  The federal Bureau of Mines conducted research to develop methods of removing phosphorus from the earthy, calcareous hematite ores of the Birmingham, Alabama, Iron District while simultaneously improving the grade and recovery of the iron values prior to furnacing. An attempt was also made to identify the phosphorus minerals present in the ores. The ores contained about 36 percent iron, 12 to 16 percent cao, 15 to 20 percent hydrochloric acid insolubles, and 0.30 to 0.36 percent phosphorus. Fractions containing 5 to 15 percent phosphorus were isolated from the ores. Collophanite, ca3p2o8.Nh2o, a member of the apatite group, was the only phosphate mineral identified. Beneficiation methods using flotation and reduction roasting with magnetic separation yielded good grade iron concentrates, but were not as effective for reducing the phosphorus content of concentrates. Reduction roasting followed by fine grinding, magnetic separation, and acid leaching gave iron concentrates containing 62.5 percent iron and 0.04 percent phosphorus with an iron recovery of 82.9 percent and a phosphorus rejection of 93.7 percent. Reoxidation of reduced magnetic concentrates followed by acid treatment gave iron concentrates 58.1 percent iron and 0.02 percent phosphorus with 89.6 percent recovery of the iron and 96.5 percent rejection of the phosphorus. [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 ; Case Report
• Place as Subject:
  Alabama ; OSHA Region 4
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  TURC - Tuscaloosa Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-15
• NIOSHTIC Number:
  nn:10008978
• NTIS Accession Number:
  PB227618
• Citation:
  NTIS: PB 227 618 :1-15
• Federal Fiscal Year:
  1973
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:62826cb98d935c6845d022b0d2c7ae75f96c41bd7e73c92ad8b0b10cd11270df15fade5f3181050aeeb6950d4c98ff9f717c76de86482287a1ff4e8e7e96647e
• Download URL:
  https://stacks.cdc.gov/view/cdc/237621/cdc_237621_DS1.pdf
• File Type:
  [PDF - 1.26 MB ]