Behavior of Cadmium During Roasting of Zinc Concentrate

Details

• Personal Author:
  Henry, Jack L. ; Landsberg, Arne ; Leavenworth HW Jr. ; Yee DH
• Description:
  The Bureau of Mines has undertaken research to elucidate the chemistry involved in the efficient recovery and control of minor elements in base metal smelting operations. These elements should be effectively recovered not only because they have commercial value, but also because of their potential hazard to workers' health and the environment, if they are not controlled during processing. Cadmium, a minor metal in zinc ores, is the subject of this report. The roasting step of the complex zinc-smelting process was chosen for investigation because of the high potential for removing cadmium by volatilization during this primary stage. Commercial roaster feed materials were used to determine the sequence of reactions and the effect of these reactions on the volatilization of cadmium. Electron microprobe examination of both the commercial roaster product and oxidized sulfide solid solutions prepared in the laboratory showed that oxidized iron was of prime importance in preventing cadmium volatilization. The mechanism by which iron prevents cadmium volatilization is proposed, and a preheating technique is recommended for more effectively recovering cadmium prior to roasting. [Description provided by NIOSH]
• Subjects:
  Cadmium Chemistry Occupational Health Safety
• Keywords:
  Cadmium; Chemical reactions; Roasting; Zinc ores
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Conference Publications ; Case Report
• Place as Subject:
  Oregon ; OSHA Region 10
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  ALRC - Albany Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-17
• NIOSHTIC Number:
  nn:10006665
• NTIS Accession Number:
  PB81-231060
• Citation:
  Albany, OR: U.S. Department of the Interior, Bureau of Mines, RI 8543, 1981 Jun; :1-17
• Federal Fiscal Year:
  1981
• Peer Reviewed:
  False
• Source Full Name:
  Albany, OR: U.S. Department of the Interior, Bureau of Mines, RI 8543
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:b33bb5e53fd8e0fbbdbdf428a459b33d9fa75ab7c6d5df7b8886f6e5805ff70c3ed3d0500ee6e8bb492fd3d785e16673bf61aa970872fbf816c42f9ac18409d0
• Download URL:
  https://stacks.cdc.gov/view/cdc/237751/cdc_237751_DS1.pdf
• File Type:
  [PDF - 2.58 MB ]