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Separations Technology VI: New Perspectives on Very Large-Scale Operations
October 2-8, 2004 - Kingfisher Resort, Fraser Island, Queensland, Australia
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Chris Fell, University of New South Wales, Australia
George E. Keller II, MATRIC, USA
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The articles for these proceedings are peer-reviewed.
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Leaching of Low- Grade Nickel Ores by Fungi Metabolic Acids
Jessica Tang, Department of Chemical Engineering, University of Sydney, NSW, 2006, Australia
Marjorie Valix , Department of Chemical Engineering, University of Sydney, NSW, 2006, Australia
ABSTRACT:
This study was designed to investigate the nature of nickel and cobalt dissolution from limonite and weathered saprolite ores. Chemical leaching was conducted using 1 to 3M of citric, lactic and malic acids. These tests aimed to mimic metal dissolution achieved using heterotrophic or fungi organism and their corresponding metabolic products. The results in this study was able to demonstrate the effect of secondary reaction or adsorption, pulp density and the potential hampering effect of acid neutralizing minerals and acid activity or strength on metal dissolution. Nickel and cobalt dissolution were also found to be dependent on the nature of the host minerals and amenability of these gangue minerals to dehydroxylate as a result of acid attack.
Jessica Tang and Marjorie Valix , "Leaching of Low- Grade Nickel Ores by Fungi Metabolic Acids" in "Separations Technology VI: New Perspectives on Very Large-Scale Operations", Chris Fell, University of New South Wales, Australia
George E. Keller II, MATRIC, USA
Eds, ECI
Symposium Series, Volume RP3 (2004). http://services.bepress.com/eci/separations_technology_vi/5
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