Development of characterization methods for adherent anode slimes in copper electrorefining

• Autorzy: Kiviluoma M. , Aaltonen M. , Aromaa J. , Lundstrom M. , Forsen O.

Identyfikatory

DOI

10.5277/ppmp160125

• Języki publikacji: EN

Abstrakty

EN

Adherent anode slimes can cause anode passivation in copper electrorefining and lower the efficiency of copper electrorefining. Declining concentrate grades cause larger impurity levels in anodes, thus creating larger quantities of slimes in the refining process. In order to investigate the characterization methods for adherent anode slimes in copper electrorefining, experiments were conducted for the Boliden Harjavalta Pori refinery material. Methods such as particle size determination, chemical (ICP) analysis, settling rate determination, XRD, SEM-SE, SEM-BSE and SEM-EDS were applied. In addition, adherent anode slime samples were compared to optical micrograph and SEM-BSE images of respective anode copper samples. It was shown that SEM-EDS and SEM-BSE provided precise information about phases formed during electrorefining. The settling rate and particle size had a correlation only with a copper content of anode slime. The main phases in the anode slime were copper and lead sulphates as well as copper-silver selenides. NiO was shown to be the major Ni-bearing phase in the adherent slime. Nickel, tellurium and lead had the strongest, whereas arsenic, selenium and antimony had the weakest tendency to report to the anode slime.

Słowa kluczowe

EN

anode; slime; copper; electrorefining; nickel; lead; arsenic

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2016
• Tom: Vol. 52, iss. 1
• Strony: 295--302
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Kiviluoma M.

• Aalto University, School of Chemical Technology, PO Box 16200, FI-00076 AALTO, Finland

autor

Aaltonen M.

• Aalto University, School of Chemical Technology, PO Box 16200, FI-00076 AALTO, Finland

autor

Aromaa J.

• Aalto University, School of Chemical Technology, PO Box 16200, FI-00076 AALTO, Finland

autor

Lundstrom M.

• Aalto University, School of Chemical Technology, PO Box 16200, FI-00076 AALTO, Finland

autor

Forsen O.

• Aalto University, School of Chemical Technology, PO Box 16200, FI-00076 AALTO, Finland

Bibliografia

• CHEN T.T., DUTRIZAC J.E., 1989. Minerological Characterization of Anode Slimes - IV. Copper-Nickel-Antimony Oxide ("Kupferglimmer") in CCR Anodes and Anode Slimes. Canadian Metallurgical Quarterly, 28(2), 127-134.
• CHEN T.T., DUTRIZAC J.E., 1990. The Mineralogy of Copper Electrorefining. Journal of Metals, 42(8), 39-44.
• CHEN T.T., DUTRIZAC J.E., 1993. The Minerological Characterization of Tellurium in Copper Anodes. Metallurgical Transactions B, 24B, 997-1007.
• CHEN T.T., DUTRIZAC J.E., 2005. Mineralogical characterization of a Copper Anode and the Anode slimes from the La Caridad Copper Refinery of Mexicana de Cobre, Metallurgical and materials Transactions B, 36B, 229-240
• FORSEN O., 1985. The behaviour of nickel and antimony in oxygen-bearing copper anodes in electrolytic refining. Doctoral thesis. Helsinki University of Technology. Espoo, Finland.
• MOATS M., ROBINSON T., WANG S., FILZWIESER A., SIEGMUND A., DAVENPORT W., 2013. Global Survey of Copper Electrorefining Operations and Practices. Abel, R. & Delgado, C. (eds.) Proceedings of Copper 2013, Volume V, Electrowinning / Electrorefining. Santiago, Chile. 307-318.
• MOATS M.S., WANG S., KIM D., 2012. A Review of the Behavior and Deportment of Lead, Bismuth, Antimony and Arsenic in Copper Electrorefining. Wang, S. & Dutrizac, J. E. & Free, M. L., Hwang, J. Y., Kim, D. (eds.). T. T. Chen Honorary Symposium on Hydrometallurgy, Electrometallurgy and Materials Characterization. Hoboken, New Jersey, USA. 3-21.
• WANG X., CHEN Q., YIN Z., WANG M., XIAO B., ZHANG F. 2011. Homogenous precipitation of As, Sb and Bi impurities in copper electrolyte during electrorefining. Hydrometallurgy, 105, 355-358.