Combined extraction of metals and production of Mg(OH)₂ for CO₂ sequestration from nickel mine ore and overburden

Inês Romão, Licínio M. Gando-Ferreira, Ron Zevenhoven

    Research output: Contribution to journalArticleScientificpeer-review

    18 Citations (Scopus)


    Carbon storage by mineralisation (CSM) is an option for CO2 emissions mitigation that has been under intensive study at Abo Akademi (AA), Finland. Magnesium from silicate rocks is extracted with recoverable ammonium salts at 250-500 degrees C. The extracted elements are separated by selective precipitation and Mg is subsequently carbonated in a pressurised fluidised bed. This work studies the applicability of the process for co-extraction of Ni, Cu, Fe and Mg from nickel ore and nickel mine waste rock (overburden). The rock samples were collected from the Hitura Nickel mine, Finland. The results show that it is possible to co-extract the listed elements and integrate CSM (by the AA process) with steelmaking and Ni production industries.
    Original languageUndefined/Unknown
    Pages (from-to)167–170
    Number of pages4
    JournalMinerals Engineering
    Publication statusPublished - 2013
    MoE publication typeA1 Journal article-refereed


    • Ammonium bisulphate
    • Ammonium sulphate
    • Carbon storage by mineralisation
    • CO2 emissions
    • Nickel ore
    • Overburden

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