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The Recovery of Platinum, Palladium, and Gold from a Cyanide Heap Solution, with use of Ion Exchange Resins

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Open access
Authors
Schoeman, E.
Bradshaw, S.
Akdogan, G.
Eksteen, Jacques
Date
2013
Type
Conference Paper

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Citation
Schoeman, E. and Bradshaw, S.M. and Akdogan, G. and Eksteen, J. J. 2013. The Recovery of Platinum, Palladium, and Gold from a Cyanide Heap Solution, with use of Ion Exchange Resins, in Glen, H.W. (ed), "A Catalyst for Change", The 5th International Platinum Conference, Sep 18-20 2012, pp. 729-742. Sun City, South Africa: The South African Institute of Mining & Metallurgy.
Source Title
Proceedings of The 5th International Platinum Conference "A Catalyst for Change"
Source Conference
The 5th International Platinum Conference "A Catalyst for Change"
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Abstract

Ion exchange resins were investigated for the effective recovery of platinum, palladium, and gold from a pregnant cyanide heap leach solution. Screening results indicated that strong-base anion exchange resins proved to be most effective in the recovery of these metal cyanides. Gold was selectively recovered with the use of Minix, while effective recovery of gold, platinum, and palladium over the base metals, copper, and iron, was achieved with Amberlite PWA-5. Successful elution of these metal cyanides was possible from both Minix and Amberlite PWA-5, using a 2M potassium thiocyanate solution at ambient temperature. Acidic thiourea was unable to elute platinum from either Minix or Amberlite PWA-5. Effective elution of palladium and gold were, however, achieved with use of acidic thiourea. Using these results, two conceptual flow diagrams for the recovery of these metals from cyanide solutions are proposed.