Kinetics of Copper Cementation by Aluminum Powder from Sulfate Solution under Ball Milling Conditions

Authors

Metal Extraction Research Laboratory, School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran

Abstract

Despite a great thermodynamic driving force, copper cementation by aluminum from sulfate solutions involves a relatively slow kinetics due to the presence of the passive oxide film on the surface of aluminum. The previous studies have confirmed the positive effect of the presence of small amounts of chloride ion on reducing the scale of this problem. In this paper, the effect of concurrent ball milling on the kinetics of this process has been investigated. The cementation experiments were carried out in a polyamide jar with alumina balls inside by planetary ball milling. The studied parameters were ball number (0, 4), temperature (25-55 °C) and time (0-240 s). All experiments were conducted at constant condition of [Cu2+] = 6 g/L, [Cl−] = 75 mg/L, rotation speed of 160 rpm, average aluminum particle size of 279 µm and [H+] = 1.94×10-3. The results showed that concurrent ball milling reduces the induction period of the cementation process to less than 120 s.  The apparent rate constant of cementation showed the positive influence of simultaneous milling on the kinetics of the studied cementation process. Moreover, activation energies of the induction and main periods were calculated to be respectively 86 and 26 kJ.mol-1, indicating the shift of the reaction mechanism from chemical control to mass transfer control.
 

Keywords

References

1. Habashi, F., A Textbook of Hydrometallurgy, 2rd ed. Quebec, Canada: Métallurgie Extractive Québec, 1999.
2. Karavasteva, M., “Kinetics and Deposit Morphology of Copper Cementation onto Zinc, Iron and Aluminium”, Hydrometallurgy, Vol. 76, pp. 149-152, 2005.
3. Mackinnon, D. J., and Ingraham, T. R., “Kinetics of Cu(II) Cementation on Pure Aluminum Disc in Acidic Sulphate Solutions”, Canadian Metallurgical Quarterly, Vol. 9, pp. 443-448, 1970.
4. Mackinnon, D. J., and Ingraham, T. R., “Copper Cementation on Aluminum Canning Sheet”, Canadian Metallurgical Quarterly, Vol. 10, pp. 197-201, 1971.
5. Foley, R. T., “Localized Corrosion of Aluminum Alloys:A Review”, Corrosion, Vol. 42, pp. 277-288, 1986.
6. Annamalai, V., and Hiskey, J. B., “A Kinetic Study of Copper Cementation on Pure Aluminum”, Society of Mining Engineering, Vol. 30, pp. 650-659, 1978.
7. Annamalai, V., Hiskey, J. B., and Murr, L. E., “The Effects of Kinetic Variables on the Structure of Copper Deposits Cemented on Pure Aluminum Discs: A Scanning Electron Microscopic Study”, Hydrometallurgy, Vol. 3, pp. 163-180, 1978.
8. Annamalai, V., Hiskey, J. B., and Murr, L. E., “Copper Cementation onto Beverage Can Aluminum Alloys”, Society of Mining Engineers of AIME Transactions, Vol. 266, pp. 1963-1967, 1978.
9. Annamalai, V., and Murr, L. E., “Effects of the Source of Chloride Ion and Surface Corrosion Patterns on the Kinetics of the Copper-Aluminum Cementation System”, Hydrometallurgy, Vol. 3, pp. 249-263, 1978.
10. Murr, L. E., and Annamalai, V., “An Electron Microscopic Study of Nucleation and Growth in Electrochemical Displacement Reactions: A Comparison of the Cu/Fe and Cu/Al Cementation Systems”, Metallurgical Transactions B, Vol. 9, pp. 515-525, 1978.
11. Kanungo, M., Chakravarty, V., Mishra, K. G., and Das, S. C., “Influence of Perchloric Acid on the Kinetics of Immersion Plating of Copper onto Aluminium”, Hydrometallurgy, Vol. 61, pp. 1-11, 2001.
12. Chen, H. J., and Lee, C., “Effects of the Type of Chelating Agent and Deposit Morphology on the Kinetics of the Copper-Aluminum Cementation System”, Langmuir, Vol. 10, pp. 3880-3886, 1994.
13. Dönmez, B., Sevim, F., and Sarac, H., “Kinetic Study of the Cementation of Copper from Sulphate Solutions onto a Rotating Aluminum Disc”, Hydrometallurgy, Vol. 53, pp. 145-154, 1999.
14. Ekmekyapar, A., Tanaydin, M., and Demirkiran, N., “Investigation of Copper Cementation Kinetics by Rotating Aluminum Disc from the Leach Solutions Containing Copper Ions”, Physicochemical Problems of Mineral Processing, Vol. 48, pp. 355-367, 2012.
15. Djokić, S. S., “Cementation of Copper on Aluminum in Alkaline Solutions”, Journal of the Electrochemical Society, Vol. 143, pp. 1300-1305, 1996.
Journal of Advanced Materials in Engineering (Esteghlal)
Volume 36, Issue 1
June 2017
Pages 87-96

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