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Recycling of Waste Magnesite-Chrome Refractories from Copper Smelting Furnaces

Public Domain


Details

  • Personal Author:
  • Description:
    In accordance with its objective to maximize minerals recovery from secondary domestic resources, the Bureau of Mines conducted research on recycling chrome refractory wastes. Since 20 pct of the U.S. Demand for imported chromite is used in the production of refractories, primarily for the steel, copper, and glass industries, samples of used chrome-containing refractories from copper converter and reverberatory furnaces were investigated to determine their potential for recycling. The samples were beneficiated using a combination of wet magnetic separation, flotation, and leaching techniques, and the concentrates were reformed into briquets for refractory evaluation. Small refractory test specimens produced from the beneficiated concentrates gave modulus of rupture values at 1,350 deg. C comparable to those of commercial mag-chrome brick of similar composition; however, grinding the waste refractories to at least minus 65-mesh was required in order to liberate the metallic copper. Most of the copper was easily recovered using conventional beneficiation techniques, but the finely ground chrome concentrate would require briquetting, calcining, and crushing to produce a coarse grain suitable for recycling into secondary mag-chrome refractories. [Description provided by NIOSH]
  • Subjects:
  • Series:
    Mining Publications
  • Subseries:
    Report of Investigations
  • Document Type:
    Text
  • Genre:
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Division:
    TURC - Tuscaloosa Research Center
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    1-18
  • NIOSHTIC Number:
    nn:10006755
  • Citation:
    Tuscaloosa, AL: U.S. Department of the Interior, Bureau of Mines, RI 8589, 1981 Jan; :1-18
  • Federal Fiscal Year:
    1981
  • Peer Reviewed:
    False
  • Source Full Name:
    Tuscaloosa, AL: U.S. Department of the Interior, Bureau of Mines, RI 8589
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:e7003eb102b216498bf9407d229b80e3426c0ba5c7b74ee7aaf977bcd972b5d8817776d7b76e9e18d040a0445b9d9508f494db078fa2b6acdb3312cf74f38f24
  • Download URL:
  • File Type:
    Filetype[PDF - 1.72 MB ]
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