Effect of silver, nickel and copper cyanides on gold adsorption on activated carbon in cyanide leach solutions

• Autorzy: Sayiner B. , Acarkan N.

Identyfikatory

DOI

10.5277/ppmp140123

• Języki publikacji: EN

Abstrakty

EN

The effect of Ag, Ni and Cu cyanides on gold adsorption on activated coconut carbon in cyanide leach solutions was investigated by synthetic cyanide leach solutions containing gold and other metal cyanides. According to the adsorption tests Ag remarkably reduces the gold adsorption on activated carbon by competing with gold to adsorption sites. When the Ag concentration in solution increases up to 200 ppm the carbon adsorption method for gold recovery becomes inapplicable. Ni has an effect on gold adsorption on activated carbon, however even at as high concentrations of Ni as 250 ppm residual Au in solution is still below 1 ppm. Cu addition up to 300 ppm does not affect the gold loading significantly. According to the adsorption test studies, it is concluded that the metal-cyanides diminish the gold adsorption on activated carbon by adsorbing themselves and competing with gold. When the metals are present in the leach solution all together with gold, they also prevent adsorption of themselves as well as gold. Thus, when Au, Ag, Ni and Cu are present in solution simultaneously, the adsorption of all these metals decreases. The adsorption results were modeled by Fleming k,n adsorption kinetic model.

Słowa kluczowe

EN

gold; silver; nickel; copper; cyanide leaching; activated carbon adsorption

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2014
• Tom: Vol. 50, iss. 1
• Strony: 277--287
• Opis fizyczny: Bibliogr. 14 poz., rys., tab.

Twórcy

autor

Sayiner B.

• Kozagold Corp. Kaymaz Gold Mine, P.O. Box 26640, Eskisehir, Turkey

autor

Acarkan N.

• Istanbul Technical University, Mineral Processing Eng. Faculty, P.O. Box 34469, Istanbul, Turkey

Bibliografia

• 1. ADAMS M.D., 1992, The mechanisms of adsorption of Ag(CN)2 − and Ag+ on to activated carbon Hydrometallurgy, Vol. 31, Iss. 1–2, September 1992, 121–138.
• 2.DAI X., BREUER P.L., 2009, Cyanide and copper cyanide recovery by activated carbon Minerals Engineering, Vol. 22, Iss. 5, 469–476.
• 3. DAVIDSON R.J., SOLE M.J., 2007, the major role played by calcium in gold plant circuits. The Journal of The Southern African Institute of Mining and Metallurgy, Vol. 107 refereed paper July, 463–468.
• 4. FLEMING C.A., MEZEI A., BOURRICAUDY E., CANIZARES M., ASHBURY, M., 2011, Factors influencing the rate of gold cyanide leaching and adsorption on activated carbon, and their impact on the design of CIL and CIP circuits Minerals Engineering, Vol. 24, Iss. 6, 484–494.
• 5. FLEMING C.A., NICOL M.J., 1984, The adsorption of gold cyanide onto activated carbon. III. Factors Influencing the Rate of Loading and the Equilibrium Capacity. J. S. Afr. Inst.Min. Metall., Vol. 84, No. 4, 85–93.
• 6. IBRADO A.S., FUERSTENAU D.W., 1995, Infrared and X-ray photoelectron spectroscopy studies on the adsorption of gold cyanide on activated carbon. Minerals Engineering, Vol. 8, Iss. 4–5, April–May 1995, 441–458.
• 7. PETERSEN F.W., VAN DEVENTER J.S.J., LORENZEN L., 1993, The interaction between metal cyanides, fine particles and porous adsorbents in an agitated slurry, Chemical Engineering Science, Vol. 48, Iss. 16, 2919–2925.
• 8. POINERN G.E.J., SENANAYAKE G., SHAH N., THI-LE X.N., PARKINSON G.M., 2011, Adsorption of the aurocyanide Au(CN)2- complex on granular activated carbons derived from macadamia nut shells – A preliminary study. Minerals Engineering 24, 1695–1702.
• 9. REES K.L, VAN DEVENTER J.S.J., 2001, Gold process modeling. I. Batch modeling of the processes of leaching, preg-robbing and adsorption onto activated carbon Minerals Engineering, Vol. 14, Iss. 7, 753–773.
• 10. ROMERO A., SAMPAIO C. H., 1993, Characterization of Activated Carbons for the Extractive Metallurgy of Gold. Turkey XML.
• 11. SHEYA S.A.N., PALMER G.R., 1989, Effect of metal impurities on adsorption of gold by activated carbon in cyanide solutions. U.S. Bureau of Mines, Technical Note, 1–13.
• 12. VEGTER N.M., SANDERBERGH R.F., 1997, Communications Discussion of -The Adsorption Kinetics of Dicyanoaurate and Dicyanoargentate Ions in Activated Carbon. Metallurgical and Material Transactions B, Vol. 28B, April, 345–347.
• 13. XIE F., 2010, Solvent extraction of copper and cyanide from waste cyanide solution, Doktorate Thesis, The University of British Columbia, April 2010.
• 14. YIN X., OPARA A., DU H., MILLER J.D., 2011, Molecular Dynamics Simulations of metal-cyanide complexes: Fundamental considerations in gold hydrometallurgy. Hydrometallurgy 106, 64–70.