Recycling of Precious Metals from E-scrap

Document Type : Research Article

Authors

1 Mining and Metallurgy Institute Bor, Zeleni Bulevar 35, Bor, SERBIA

2 Innovation Center of the Faculty of Technology and Metallurgy, University of Belgrade, Karnegieva 4, Belgrade, SERBIA

3 Directorate of Measures and Precious Metals, Mike Alasa 14, Belgrade, Department of the Control Subjects in Precious Metals, Generala Boze Jankovića 32, Niš, SERBIA

Abstract

Recovery of gold and other valuable metals from electronic scrap involves a complex metallurgical flow sheet and requires state-of-the-art recovery technologies that are available in large-scale, integrated smelter and refinery operations. At the end of their use, electronic and other electrical product scrap offer an important recycling potential for the secondary supply of gold and silver into the market. With gold concentrations reaching 200-250 g/t for computer circuit boards, this scrap is an ‘urban mine’ that is significantly richer in gold than the sources of the primary ores today. This paper gives methods of gold and silver recovery from printed circular board.  The methods of purification are given and they separate gold from the impurities (tin, copper and nickel). The obtained gold and silver have 99.99% quality.

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References

[1] Babu B.R., Parande A.K., Electrical and Electronic Waste: Global Environmental Problem, http://wmr.sagepub.com
[2] Herat S., International Regulations and Treaties on Electronic Waste (e-waste), International Journal of Environmental Engineering, 1 (4), p. 335 (2009).
[3] Recast of the WEEE and RoHS Directives Proposed in 2008, ttp://ec.europa.eu/environment/waste/weee/ index _en.htm
[4] Corty C.W., Hagelüken C., Recylcing of Gold from Electronics: Cost-Effective use Through Design for Recycling, Gold Bulletin September, 43(3), p. 209 (2010).
[5] http://www.cfsd.org.uk/seeba/TD/reports/PCBStudy.pdf.
[6] Zhang S., Forssberg E., Mechanical Separation-Oriented Characterization of Electronic Scrap, Resour. Conserv. Recycl.,21, p. 247(1997).
[7] Zhang S., Forssberg E., Arvidson B., Moss W., Aluminum Recovery from Electronic Scrap by High-Force Eddy-Current Separators, Resour. Conserv. Recycl.,23,p. 225(1998).
[8] Hall W.J., Williams P.T., Separation and Recovery of Materials from Scrap Printed Circuit Boards, Resour. Conserv. Recycl.,51, p. 691(2007).
[9] Gloe K., Mühl P., Knothe M., Recovery of Precious Metals from Electronic Scrap, Inparticular from Waste Products of the Thick-Layer Technique, Hydrometallurgy,25, p. 99(1990).
[10] Oishi T., Koyama K., Konishi H., Tanaka M., Lee J.C., Influence of Ammonium Salt on Electrowinning of Copper from Ammoniacal Alkaline Solutions, Electrochim.Acta,53,p. 127(2007).
[11] Pilone D., Kelsall G.H., Prediction and Measurement of Multi-Metal Electrode-Position Rates and Efficiencies in Aqueous Acidic Chloride Media, Electrochim. Acta, 51, p. 3802(2006).
[12] Park Y.J., Fray D.J., Recovery of High Purity Precious Metals from Printed Circuit Boards, Journal of Hazardous Materials, 164, p. 1152 (2009).
[13] Kirk-Othmer, "Encyclopedia of Chemical Technology", 4th ed., Vol. 26, John Wiley & Sons, New York, (1998).
[14] Goosey M., Kellner R., "A Scoping Study End-of-Life Printed Circuit Boards", Shipley EuropeLimited, Coventry, (2002).
[15] Kamberović Ž., Korać M., Ivšić D., Nikolić V., Ranitović M., Hydrometallurgical Process for Extraction of Metals from Electronic Waste-Part I: Material Characteization and Process Option Selection,MJoM,15 (4), p. 231 (2009).
[16] Dragulović S., Dimitrijević S., Pešovski B., Review of Price for Refnment Gold Contact Scrap of Electronic Computers, 13th International Research TMT 2009., Hammamet, TunisiaISBN 1840-4944, UDK 621:001.892)(063)(082).

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