Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/21661
Appears in Collections:Management, Work and Organisation Journal Articles
Peer Review Status: Refereed
Title: Considering environmental costs of copper production in cut-off grades optimization
Authors: Rahimi, Esmail
Oraee, Kazem
Aldin, Shafahi Tonkaboni Zia
Ghasemzadeh, Hasan
Contact Email: s.k.oraee-mirzamani@stir.ac.uk
Keywords: Hydrometallurgical methods
Environmental impacts
Leaching
Concentration
Cut-off grades
NPV maximization
Issue Date: Sep-2015
Publisher: Springer
Citation: Rahimi E, Oraee K, Aldin Shafahi Tonkaboni Z & Ghasemzadeh H (2015) Considering environmental costs of copper production in cut-off grades optimization, Arabian Journal of Geosciences, 8 (9), pp. 7109-7123.
Abstract: The average grades of copper mines are dropped by extracting high-grade copper ores. This matter has drawn considerations to processing methods which not only extracts low-grade copper ores but also decreases adverse environmental impacts. Hydrometallurgical methods are the most applicable ones which affect the optimum policy of cut-off grades determination. In this research, an optimum cut-off grades modeling is developed with the objective function of net present value (NPV) maximization. The costs of processing methods and associated environmental costs are also involved in the model. Next, limiting and balancing cut-off grades of processing methods are calculated through Lagrange multiplier optimization method. Finally, an iteration algorithm is exercised to compute the maximum amount of NPV as well as concentration and leaching optimum cut-off grades. The results show that the concentration and leaching optimum cut-off grades policy makes an improvement on overall NPV by 35% in comparison with the traditional approaches of cut-off grades determination. The adverse environmental impacts of low-grade ores dumping are also reduced by using hydrometallurgical methods.
Type: Journal Article
URI: http://hdl.handle.net/1893/21661
DOI Link: http://dx.doi.org/10.1007/s12517-014-1646-x
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Islamic Azad University
Management Work and Organisation
Tehran University
K.N. Toosi University of Technology

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