Key Elements in the Use of in situ Recovery Technology For Deep and Complex Ore Deposits

L. O. Filippov and Bénédicte Lechenard and Caroline Izart and Gautier Laurent and Philippe Marion and Jean-Jacques Royer. ( 2017 )
in: Goldschmidt Abstracts 2017

Abstract

The in-situ recovery (ISR) method involves injection and producer wells between which a leach solution circulates and recovers the targeted commodity directly within the ore body. Pregnant solution is then brougth back to the surface, hydrometallurgically processed and renewed into fresh leach solution. This process is already well known in the uranium production (Beverley, Honeymoon (Aus), Nine Mile Lake (US), Tortkuduk (Kaz), etc.) and represents 51% of the total uranium production in 2014 [1]. The feasability study of an extension of ISR to other commodities is an aim of the European H2020 BioMOre project. BioMOre current case study is the copper deposit of Rudna, Poland, where bacteria are used for the regeneration of the ferric-acid leach solution. In this contribution, we highligth the importance of the ore characterization and how it affects the whole process of ISR and its feasability. The ore characterization lies on a qualitative and quantitative mineralogical description, a petrographical study as well as a petrophysical assesment. In the Rudna test site, the ore contains copper-bearing sulfides but also halite, carbonates and copper-bearing chloride-hydroxide. This mineralogy impacts the leaching on different points. Firstly, halite has to be removed to get a bio-compatible environment as well as carbonates for pH buffer issues. Finally, the nature of copper-bearing minerals directly impacts the kinetic of copper recovery. Petrophysical and petrographical properties are also needed to correctly model the leaching process. The extension of the in-situ recovery study area to other commodities, especially to critical commodities for European supplies (Mo, Sn, REE, PGE, etc.), is also stongly dependant on the deposit mineralogy. The European ProMine database is used to select potential ISL-compatible deposits, according to their geological context and mineral assemblage.

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    BibTeX Reference

    @INPROCEEDINGS{,
        author = { Filippov, L. O. and Lechenard, Bénédicte and Izart, Caroline and Laurent, Gautier and Marion, Philippe and Royer, Jean-Jacques },
         title = { Key Elements in the Use of in situ Recovery Technology For Deep and Complex Ore Deposits },
     booktitle = { Goldschmidt Abstracts 2017 },
          year = { 2017 },
      abstract = { The in-situ recovery (ISR) method involves injection and
    producer wells between which a leach solution circulates and
    recovers the targeted commodity directly within the ore body.
    Pregnant solution is then brougth back to the surface,
    hydrometallurgically processed and renewed into fresh leach
    solution. This process is already well known in the uranium
    production (Beverley, Honeymoon (Aus), Nine Mile Lake
    (US), Tortkuduk (Kaz), etc.) and represents 51% of the total
    uranium production in 2014 [1].
    The feasability study of an extension of ISR to other
    commodities is an aim of the European H2020 BioMOre
    project. BioMOre current case study is the copper deposit of
    Rudna, Poland, where bacteria are used for the regeneration
    of the ferric-acid leach solution. In this contribution, we
    highligth the importance of the ore characterization and how
    it affects the whole process of ISR and its feasability.
    The ore characterization lies on a qualitative and
    quantitative mineralogical description, a petrographical study
    as well as a petrophysical assesment. In the Rudna test site,
    the ore contains copper-bearing sulfides but also halite,
    carbonates and copper-bearing chloride-hydroxide. This
    mineralogy impacts the leaching on different points. Firstly,
    halite has to be removed to get a bio-compatible environment
    as well as carbonates for pH buffer issues. Finally, the nature
    of copper-bearing minerals directly impacts the kinetic of
    copper recovery. Petrophysical and petrographical properties
    are also needed to correctly model the leaching process.
    The extension of the in-situ recovery study area to other
    commodities, especially to critical commodities for European
    supplies (Mo, Sn, REE, PGE, etc.), is also stongly dependant
    on the deposit mineralogy. The European ProMine database is
    used to select potential ISL-compatible deposits, according to
    their geological context and mineral assemblage. }
    }