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ReFina - Novel methods for enhanced recovery of metals and minerals from fine incineration ash

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    0575927 - ÚCHP 2024 GR eng C - Conference Paper (international conference)
    Muñiz Sierra, Hector - Šyc, Michal
    ReFina - Novel methods for enhanced recovery of metals and minerals from fine incineration ash.
    Book of Abstracts. 2023, s. 136, č. článku O-58..
    [International Conference on Raw Materials and Circular Economy RawMat2023 /2./. Athens (GR), 28.08.2023-02.08.2023]
    Institutional support: RVO:67985858
    Keywords : non-ferrous metals * incineration bottom ash * hydrometallurgy * aerated-concrete
    OECD category: Chemical process engineering

    The fine fraction of municipal solid waste incinerator bottom ash, less than 2 millimeters, represents between 6 and 8 million tons of waste per year in Europe, which is typically disposed of in landfills. However, this fraction has proven to be a secondary source of valuable materials such as copper (1.6 to 3.5 g/kg) or zinc (2.5-6.5 g/kg). In addition, the high content of elemental aluminum in this residue, up to 10 g/kg, is also of interest for the production of the so-called lightweight or aerated concrete. The current ReFina project aims at an integrated treatment of this municipal residue. Our research has succeeded in obtaining, through physical concentration treatments, a concentrated product of dense non-ferrous materials, such as copper, with concentrations higher than 100 g/kg. At the same time, the light mineral fraction obtained has been successfully used as an aggregate to obtain aerated concrete with similar properties to those of market formulations. Finally, the concentrated product of dense non-ferrous metals has been treated with novel hydrometallurgical techniques capable of achieving high recovery values of the target metals. All these studies have been carried out in line with the theory of circular economy, incorporating the mineral fraction of the bottom ash into the construction industry and integrating these valuable metals obtained into the European market, ultimately reducing our dependence on raw materials from third countries.
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    Book_Of_Abstracts_RawMat2023_final.pdf18.3 MBPublisher’s postprintopen-access
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