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Economic Assessment of an In Situ Leaching Operation with Ore Preconditioning Using Sublevel Stoping Techniques

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Abstract

In situ leaching (ISL) is an attractive technique that enables copper recovery from copper oxide ores that are either low-grade or located at depths too great to be economically exploited through conventional methods. At present, in situ leaching (ISL) has been applied to intact copper oxide ores, in particular, those which (i) present a good natural permeability and (ii) do not require preconditioning. Many copper oxide ores present low natural permeability. These are located above the water table and need preconditioning for the ISL application. The present work shows an economic assessment of the application of ISL to this type of copper ores. The preconditioning technique considered here involves the application of partial mining by sublevel stoping by removing a small fraction of the ore. This technique results in forming an ore bed with good permeability and good solution collection at the stope base. The economic assessment of this approach suggests that it can be implemented with positive net present values to copper oxide ores located at depths in the 100–300 m range, with copper grades above 0.4%. The maximum acid consumption values are below 52.5 kg/t, with blasting procedures designed to produce an ore bed with an average particle size below 6″. The breakdown of operational costs indicates that the mining cost is still very high, accounting for up to 60% of the total operating costs. Therefore, optimizing mining procedures is still necessary for improving the economic outlook of this approach and thus expanding the application field of ISL.

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References

  1. Sinclair L, Thompson J (2015) In situ leaching of copper: challenges and future prospects. Hydrometallurgy 157:306–324. https://doi.org/10.1016/j.hydromet.2015.08.022

    Article  Google Scholar 

  2. Seredkin M, Zabolotsky A, Jeffress G (2016) In situ recovery, an alternative to conventional methods of mining: exploration, resource estimation, environmental issues, project evaluation and economics. Ore Geol Rev 79:500–515. https://doi.org/10.1016/j.oregeorev.2016.06.016

    Article  Google Scholar 

  3. Märten H (2019) Trends in IRS Technology. Proceedings of the ALTA 2019 conference, 18–25 May 2019, Perth, Australia.

  4. Batterham RJ, Robinson DJ (2019) Will in-place recovery ever replace the need for flotation? Min Metall Explor 36:189–197. https://doi.org/10.1007/s42461-018-0030-x

    Article  Google Scholar 

  5. BIOMore (2018) D7.1: Economic evaluation of coupled chemical-biochemical underground block leaching scenarios. BIOMOre project , New Mining Concept for Extracting Metals from Deep Ore Deposits using Biotechnology, KGHM Polska Miedz SA, Lubin, Poland. BIOMOre: An Alternative Mining Concept Project, Technical Report. https://www.biomore.info/project/public-deliverables/. Accessed July 2019

  6. Williamson CT (1998) Hydrologic mechanisms and optimization of in-situ copper leaching: case study – BHP copper, San Manuel, Arizona. MSc Thesis of the Department of Hydrology and Water Resources, University of Arizona. https://repository.arizona.edu/handle/10150/191229. Accessed Jan 2023

  7. M3 Engineering (2013) Florence copper project: NI 43–101 technical report pre-feasibility study Florence, Pinal County, Arizona. https://www.florencecopper.com/assets/docs/reports/ni-43-101-florence-copper-pre-feasibility-study.pdf (Accessed May 2022)

  8. M3 Engineering (2017) Gunnison copper project: NI 43–101 technical report feasibility study Cochise County, Arizona, USA. https://www.excelsiormining.com/images/pdf/Feasibility/43101TechReportGunnison2017.pdf . Accessed May 2022

  9. Batterham RJ (2017) The mine of the future – even more sustainable. Min Eng 107:2–7. https://doi.org/10.1016/j.mineng.2016.11.001

    Article  Google Scholar 

  10. Iriarte JI (2015) Evaluación de Explotación en Yacimientos Toki y Quetena mediante Lixiviación de Caserones. Mining Engineer Thesis, University of Chile. http://repositorio.uchile.cl/handle/2250/133538 (In Spanish)

  11. Bahamondez C, Castro R, Vargas T, Arancibia E (2016) In situ mining through leaching: experimental methodology for evaluating its implementation and economic considerations. J S Afr I Min Metall 116(7):689–698. https://doi.org/10.17159/2411-9717/2016/v116n7a11

    Article  Google Scholar 

  12. Vargas T, Estay H, Arancibia E, Díaz-Quezada S (2020) In situ recovery of copper sulfide ores: alternatives process schemes for bioleaching application. Hydrometallurgy 196:105442. https://doi.org/10.1016/j.hydromet.2020.105442

    Article  Google Scholar 

  13. Rossien M (2020) Economic modelling and application of in-situ recovery in hard rock mining. Proceedings of the ALTA 2020 conference, 19 November 2020, Online.

  14. Evans LC (2010) Partial differential equations, 2nd edn. American mathematical society, USA

    MATH  Google Scholar 

  15. Guiachetti DA (2011). Consumo de ácido sulfúrico y cinética de lixiviación de un mineral oxidado de cobre. Chemical and Biotechnology Engineer Thesis, University of Chile. https://doi.org/10.58011/newj-nc08 (In Spanish)

  16. Vargas T, Rojas F, Bahamondez C, Castro R, Ihle CF, Caraballo M, Widzyk-Capehart E (2017) Physical and chemical transformations of gangue materials during leaching of copper sulfides, and their influence on copper leaching kinetics. J S Afr I Min Metall 117:727–730. https://doi.org/10.17159/2411-9717/2017/v117n8a1

    Article  Google Scholar 

  17. Levenspiel O (1999) Chemical Reaction Engineering, 3rd edn. John Wiley & Sons Inc., New York, USA

    Google Scholar 

  18. Barlett RW (1998) Solution mining: leaching and fluid recovery of materials, 2nd edn. Gordon and Breach Science Publishers, Amsterdam, Netherlands

    Google Scholar 

  19. Cho SH, Kaneko K (2004) Rock fragmentation control in blasting. Mater Trans 45:1722–1730

    Article  Google Scholar 

  20. Singh PK, Roy MP, Paswan RK, Sarim Md, Kumar S, Jha RR (2016) Rock fragmentation control in opencast blasting. J Rock Mech Geotech Eng 8:225–237. https://doi.org/10.1016/j.jrmge.2015.10.005

    Article  Google Scholar 

  21. Duranović M, Đokić N, Lapčević V, Torbica S, Petrović M, Savić L (2018) Optimization of ring blasting in sublevel stoping gold mine. Podzemni Radovi 33:61–68. https://doi.org/10.5937/PodRad1833061D

    Article  Google Scholar 

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Funding

The authors gratefully acknowledge the financial support of the National Commission for Scientific and Technological Research (CONICYT Chile) through the CONICYT-PIA Project AFB180004 and ANID Project AFB220002.

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Correspondence to Tomás Vargas.

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Estay, H., Díaz-Quezada, S., Arancibia, E. et al. Economic Assessment of an In Situ Leaching Operation with Ore Preconditioning Using Sublevel Stoping Techniques. Mining, Metallurgy & Exploration 40, 493–504 (2023). https://doi.org/10.1007/s42461-023-00736-y

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