Oxidation Roasting of Chalcocite Concentrate

Details

• Personal Author:
  Fine, Morris M. ; Landstrom AB ; Schluter, Robert B.
• Description:
  Chalcocite flotation concentrates (26 to 34 percent cu and 6 to 7 percent s) were roasted in air to determine sulfur elimination as a function of temperature, airflow rate, and residence time. Fluosolids roasting was evaluated batchwise and continuously in a 4- inch fluid-bed reactor. Kiln roasting tests were carried out in a 4- inch-id by 6-inch-long rotary drum. Pelletizing the very fine concentrates prior to roasting was essential to minimize dust losses and accretions. Concentrate pellets, sized minus 10 plus 20 mesh and bonded with 2 percent bentonite, were excellent feed for fluosolids roasting and limited dust losses to 10 percent or less. One-fourth-inch pellets were best suited to kiln roasting. Both techniques were capable of producing copper calcines analyzing well under 1 percent residual sulfur when operated at 900 deg. C with average retention times of 3 to 4 hours. Calcined pellets were strong, porous, and readily reducible. [Description provided by NIOSH]
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Conference Publications ; Case Report
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  TCRC - Twin Cities Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-19
• NIOSHTIC Number:
  nn:10008913
• NTIS Accession Number:
  PB-190030
• Citation:
  NTIS: PB 190 030 :19 pages
• Federal Fiscal Year:
  1970
• Peer Reviewed:
  False
• Source Full Name:
  NTIS: PB 190 030
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:a72c11c653fb5f6917b8840a73fdc488ce682176958816227d2f7a7d235f3e78f760c4919432c61f8c342fc219853a05affc8f9b0def50261fb4c1b0b3229e54
• Download URL:
  https://stacks.cdc.gov/view/cdc/237637/cdc_237637_DS1.pdf
• File Type:
  [PDF - 8.41 MB ]