Trace Metal Distributions in Nickel Slag Cleaning

Niko Hellsten, Pekka Taskinen, Hannu Johto, Ari Jokilaakso

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

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To capture efficiently the valuable trace metals from nickel slag using electric furnace, it is important to study their distributions between the slag and metallic phases in the furnace. It is impossible to calculate accurately these distributions without experimental measurements. Therefore, in this work, selected trace metal distributions and phase equilibria between K2O containing iron-silicate slags and a metallic Ni-Fe-Cu alloy in nickel slag cleaning furnace conditions were studied. The experimental method developed and applied during the work, involved a modified quenching technique that included equilibration of the samples in semi-sealed quartz ampoules in an inert atmosphere and metallic Fe saturation. The use of the semi-sealed quartz ampoule prevents the escape of volatile elements from the sample during equilibration. Chemical compositions of the phases and the trace elements were analysed by EPMA. From the measured compositions, the trace metal distribution coefficients between the molten Ni-Fe-Cu alloy and slag were calculated.
Original languageEnglish
Title of host publicationExtraction 2018
Subtitle of host publicationProceedings of the First Global Conference on Extractive Metallurgy
EditorsBoyd Davis, M Moats, S Wang
Number of pages10
ISBN (Electronic)978-3-319-95022-8
ISBN (Print)978-3-319-95021-1
Publication statusPublished - 2018
MoE publication typeA3 Book section, Chapters in research books
EventGlobal Conference on Extractive Metallurgy - Ottawa, Canada
Duration: 26 Aug 201829 Aug 2018
Conference number: 1

Publication series

NameThe Minerals, Metals & Materials Series
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696


ConferenceGlobal Conference on Extractive Metallurgy
Internet address


  • NI slag cleaning
  • Distribution of Ag, Au, Sb and Pb
  • Semi-closed ampoule


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