Sulfation Mechanism of CoO and NiO

  • L. E. K. Holappa
  • M. H. Tikkanen


Sulfatizing roasting is used when separating small contents of valuable metals from sulfide and composite ores. In sulfatizing roasting the desired constituents are selectively converted to water soluble sulfates, whilst other constituents such as iron remain as insoluble oxides. In Finland the sulfatizing roasting process has been used at the Outokumpu Oy Kokkola Works for the extraction of cobalt and nickel from roasted calcines and pyritepyrrhotite concentrates since 1967 (1).


Nickel Oxide Gold Marker Sulfate Layer Parabolic Kinetic Cobalt Sulfate 
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Copyright information

© Springer Science+Business Media New York 1977

Authors and Affiliations

  • L. E. K. Holappa
    • 1
  • M. H. Tikkanen
    • 2
  1. 1.Tech., Research Center,Ovako GroupImatraFinland
  2. 2.Dept. of Metallurgy,Helsinki University of TechnologyOtaniemiFinland

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