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Acid‐bacterial and ferric sulfate leaching of pyrite ...

Acid‐bacterial and ferric sulfate leaching of pyrite ...

Pyrite in ferric solutions was observed to be different when compared to acid‐bacterial . Ferric required nearly 2 × 10 3 ppm of Fe 3+ at 30°C while acid‐bacterial at 30°C occurred without additions of Fe 3+ , and values of Fe 3+ never exceeded 10 2 ppm.

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  • The Leaching of Chalcopyrite in Ferric Chloride and Ferric ...

    The Leaching of Chalcopyrite in Ferric Chloride and Ferric ...

     · The morphology of leaching was studied by using a single chalcopyrite crystal and it appeared quite different with the two solutions. produced a porous elemental sulfur layer whereas resulted in the formation and peeling-off …

  • NIOSHTIC-2 Publications Search - 10008561 - Effects of ...

    NIOSHTIC-2 Publications Search - 10008561 - Effects of ...

    To this end, investigations to improve the kinetics to chalcopyrite dissolution by simultaneous grinding- leaching in ferric sulfate solution were conducted using the Bureau- designed turbomill. The development of such a hydrometallurgical process would provide a nonpolluting alternative to …

  • JP2005350719A - Leaching method of copper sulfide ores ...

    JP2005350719A - Leaching method of copper sulfide ores ...

    An efficient method for copper from copper sulfide ores containing at a high rate with a high rate is provided. A method of copper from a copper sulfide ore containing , the copper sulfide ore containing 1 to 5 times the amount of pyrite and 0.1 to 0.1 times the total weight of the copper mineral in the copper sulfide ore.

  • Acid-bacterial and ferric sulfate leaching of pyrite ...

    Acid-bacterial and ferric sulfate leaching of pyrite ...

    Pyrite in ferric solutions was observed to be different when compared to acid-bacterial . Ferric required nearly 2 X 10/sup 3/ ppm of Fe/sup 3 +/ at 30/sup 0/C while acid-bacterial at 30/sup 0/C occurred without additions of Fe/sup 3 +/, and values of Fe/sup 3 +/ never exceeded 10/sup 2/ ppm.

  • NIOSHTIC-2 Publications Search - 10009131 - Improved ...

    NIOSHTIC-2 Publications Search - 10009131 - Improved ...

    The system can be continuously operated at any temperature up to the boiling point of the agent. This paper describes the research on the dissolution of with acidified ferric which forms a sulfur product on the unreacted surface.

  • The dissolution of chalcopyrite in ferric sulfate and ...

    The dissolution of chalcopyrite in ferric sulfate and ...

    The literature on the ferric ion of has been surveyed to identify those parameters which are well established and to outline areas requiring additional study. New experimental work was undertaken to resolve points still in dispute. It seems well established that dissolution in either ferric chloride or ferric media is independent of stirring ...

  • Kinetic modelling of chalcopyrite leaching assisted by ...

    Kinetic modelling of chalcopyrite leaching assisted by ...

     · Conventional chalcopyrite leaching in media was first carried out as control tests without the addition of iodide. It is well known that chalcopyrite leaching in media exhibits slow kinetics and is strongly influenced by the redox potential.

  • Chloride‐promoted leaching of chalcopyrite concentrate by ...

    Chloride‐promoted leaching of chalcopyrite concentrate by ...

    The effects of chloride ions on by biologically‐produced ferric solution and on the iron‐oxidizing culture were determined. Chloride ions significantly increased chalcop...

  • RESPONSE SURFACE METHODOLOGY RSM FOR …

    RESPONSE SURFACE METHODOLOGY RSM FOR …

    is the most interesting approach, ... novel process for , Galvanox™, based on a galvanically-assisted has been introduced Dixon et al., 2008. In this process, pyrite provides an alternative surface for ferric reduction. Providing a …

  • Chalcopyrite leaching in acid media: a review ...

    Chalcopyrite leaching in acid media: a review ...

    The paper presents the existing knowledge of the procedure and phenomena that accompany oxidation in acidic and chloride solutions. References E.M. Cordoba, H.J.A. Munoz, M.L. Blazquez, F. Gonzalez, A. Ballester: Hydrometallurgy, 93 2008 81-97.

  • PDF Hydrothermal pretreatment of chalcopyrite ...

    PDF Hydrothermal pretreatment of chalcopyrite ...

    The suggested method consists of oxidative followed by hydrothermal pretreatment of concentrates with copper solutions. The pressure oxidative of the...

  • For oxidative leaching of chalcopyrite with dissolved ...

    For oxidative leaching of chalcopyrite with dissolved ...

    For oxidative of with dissolved oxygen and ferric ions in media. The routes of in acidic aqueous solution have been discussed by thermodynamic calculation under different aqueous species concentrations, such as Cu2+, Fe2+ and H2S. The results show that for both oxidative dissolution and non-oxidative dissolution of the …

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