Fundamental Process Equilibria of Base and Trace Elements in the DON Smelting of Various Nickel Concentrates

Pekka Taskinen, Katri Avarmaa, Hannu Johto, Petri Latostenmaa

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The converter-less nickel matte smelting technology (DON) adopted more than 20 years ago in Boliden Harjavalta smelter has been since that applied successfully to the processing of large number of nickel sulphide concentrates of various Ni-to-Cu ratios and MgO contents. The operational point of the technology is far from the conventional primary nickel smelting in the smelting-converting route. Therefore, a careful scouting of distribution equilibria of the base and trace elements in the smelting conditions of DON process has been conducted, in order to obtain quantitative information about the equilibria and thermodynamic properties of the nickel mattes at low iron concentrations, less than 10 wt% [Fe] in matte. The series of investigations has included novel experimental and analytical techniques for increasing the reliability and sensitivity of the phase equilibria as well as the element distribution observations carried out in typical high-grade nickel matte smelting conditions.
Original languageEnglish
Title of host publicationExtraction 2018
Subtitle of host publicationProceedings of the First Global Conference on Extractive Metallurgy
EditorsBoyd Davis, Michael Moats, Shijie Wang
Number of pages12
ISBN (Electronic)978-3-319-95022-8
Publication statusPublished - 2018
MoE publication typeA4 Article in a conference publication
EventGlobal Conference on Extractive Metallurgy - Ottawa, Canada
Duration: 26 Aug 201829 Aug 2018
Conference number: 1

Publication series

NameThe Minerals, Metals & Materials Series


ConferenceGlobal Conference on Extractive Metallurgy
Internet address


  • Nickel matte
  • Iron silicate
  • Magnesia
  • Precious metals
  • Platinum group metals


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