2019-Sustainable Industrial Processing Summit
SIPS2019 Volume 4: Kozlov Intl. Symp. / Sustainable Materials Recycling Processes and Products

Editors:F. Kongoli, S.V. Alexandrovich, D.V. Grigorievich, L.L. Igoryevich, I. Startsev, T.A. Vladimirovich
Publisher:Flogen Star OUTREACH
Publication Year:2019
Pages:193 pages
ISBN:978-1-989820-03-2
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
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    Turning the Extractive-Waste Problems Into a Resource-Recovery Opportunity

    Teodor Velea1; Alexandra-Georgiana Vatui2; Ionut Macarescu2; Ioana Andreea Chirea2; Mika Paajanen3; Lieven Machiels4; Carlos Frias Gomez5; Vasile Predica6; Manuel Sevilla7;
    1NATIONAL RESEARCH- DEVELOPMENT INSTITUTE FOR NONFERROUS AND RARE METALS- IMNR BUCHAREST, ROMANIA, Pantelimon, Romania; 2NATIONAL RESEARCH- DEVELOPMENT INSTITUTE FOR NONFERROUS AND RARE METALS- IMNR BUCHAREST, ROMANIA, ILFOV, Romania; 3VTT TECHNICAL RESEARCH CENTRE OF FINLAND LTD, Tampere, Finland; 4, Heverlee, Belgium; 5COBRE LAS CRUCES, S.A., Sevilla, Spain; 6NATIONAL RESEARCH & DEVELOPMENT INSTITUTE FOR NON-FERROUS AND RARE METALS, Ilfov, Romania; 7COBRE LAS CRUCES (CLC), Seville, Spain;
    Type of Paper: Regular
    Id Paper: 243
    Topic: 7

    Abstract:

    Apart from metals, the mining and metallurgical processing of non-ferrous metals such as Cu, Pb, Zn, Au, Ag produces large volumes of waste [3]. A particular challenge is generated by waste containing residual sulphides, like pyrite, as sulphides can, upon oxidation, cause so-called acid mine drainage. This paper presents the results of experiments for advanced removal of sulphur in order to obtain near zero-waste and valuable metals products as well as other by-products [5].
    The main process applied is leaching under pressure in an alkaline media (K2CO3, Na2CO3, KOH, NaOH) using air or oxygen at low to moderate temperatures and pressure (120-155oC and 4-8 atm.) [1-2][4].
    Results show that more than 96-99% of sulphur can be removed by leaching of pyrite in one stage while from an alkaline solution (coming from pressure leaching), pure crystals of K2SO4 / Na2SO4 were obtained as valuable by-products.
    This paper is part of the NEMO project which has received funding from the European Union, EU Horizon 2020 Programme under Grant Agreement No. 776846 - https://h2020-nemo.eu/.

    Keywords:

    Alkaline; Copper; Environmental; Non-Ferrous; Processing;

    References:

    [1] T. Velea, V. Predica, L. Gherghe, The Sixth International Copper-Cobre Conference, Toronto 2007, Symposium on Copper Hydrometallurgy, vol. 4, pg. 221-230.
    [2] T. Velea, V. Predica, L Gherghe, International Conference Copper Metallurgy, Krakow, Poland 2011.
    [3] INTMET Project no. 689515/2015-2019 financed by EU in Horizon 2020 programme.
    [4] T. Velea, V. Predica, D. Taloi, S. Onisei Proceeding of the XV Balkan Minerals Proceeding Congress, Sozopol, Bulgaria, p 12-26, 2013.
    [5] NEMO Project Horizon 2020- No. 776846, 2018-2022, funding from EU

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    Cite this article as:

    Velea T, Vatui A, Macarescu I, Chirea I, Paajanen M, Machiels L, Frias Gomez C, Predica V, Sevilla M. (2019). Turning the Extractive-Waste Problems Into a Resource-Recovery Opportunity. In F. Kongoli, S.V. Alexandrovich, D.V. Grigorievich, L.L. Igoryevich, I. Startsev, T.A. Vladimirovich (Eds.), Sustainable Industrial Processing Summit SIPS2019 Volume 4: Kozlov Intl. Symp. / Sustainable Materials Recycling Processes and Products (pp. 47-58). Montreal, Canada: FLOGEN Star Outreach