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Heap leach modeling: Analysis and optimization with CFD technology

D. McBride, J.E. Gebhart, T.N. Croft, M. Cross, Diane McBride Orcid Logo

IMPC 2018 - 29th International Mineral Processing Congress, Pages: 2809 - 2822

Swansea University Author: Diane McBride Orcid Logo

Abstract

Heap leaching is well-established as a relatively low-cost and low-energy method of extracting metals from low grade ores. However, the design methodology, attention to the engineering details during heap construction and the long time scale in metal recovery makes the process susceptible to signifi...

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Published in: IMPC 2018 - 29th International Mineral Processing Congress
ISBN: 978-703022711-9
Published: Moscow; Russian Federation 29th International Mineral Processing Congress, IMPC 2018 2019
Online Access: http://impc2018.com/
URI: https://cronfa.swan.ac.uk/Record/cronfa48259
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spelling 2019-03-05T14:58:48.0096681 v2 48259 2019-01-16 Heap leach modeling: Analysis and optimization with CFD technology f045e194e1b759f3aac9e15caf8f293e 0000-0002-9736-4534 Diane McBride Diane McBride true false 2019-01-16 EEN Heap leaching is well-established as a relatively low-cost and low-energy method of extracting metals from low grade ores. However, the design methodology, attention to the engineering details during heap construction and the long time scale in metal recovery makes the process susceptible to significant variation in the success of a heap leach operation. Often the laboratory predicted recovery rates are not achieved on site due to poor understanding of the complex physics of flow and coupled solid-liquid-thermal reactions within the multi-dimensional heterogeneous ore body. Given the large scale of commercial operations, small changes in metal recovery can substantially change the operating profitability. While there are a variety of approaches to heap leach modeling, computational fluid dynamics (CFD) modeling coupled with leach kinetic models offers a methodology to describe and understand the complexities of heap leaching. The CFD model uses leach kinetics specific for the mineralogy of the ore, including gangue chemistry, and provides an energy balance to calculate and predict temperature. Coupled with the CFD model's inherent capability for modeling complex fluid flow, the physics and the chemistry of the heap can be simulated. This provides a tool for engineering design, as well as forecasting heap production under different scenarios. The calibrated model is used to simulate a three-dimensional test heap under fluctuating meteorological data, such as precipitation events, periodic solution application, and notably temperature. These simulations provide support for a methodology to design and engineer heap leaching of low grade copper sulfide ore. Conference Paper/Proceeding/Abstract IMPC 2018 - 29th International Mineral Processing Congress 2809 2822 29th International Mineral Processing Congress, IMPC 2018 Moscow; Russian Federation 978-703022711-9 31 12 2019 2019-12-31 http://impc2018.com/ COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2019-03-05T14:58:48.0096681 2019-01-16T09:01:11.6602181 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised D. McBride 1 J.E. Gebhart 2 T.N. Croft 3 M. Cross 4 Diane McBride 0000-0002-9736-4534 5
title Heap leach modeling: Analysis and optimization with CFD technology
spellingShingle Heap leach modeling: Analysis and optimization with CFD technology
Diane McBride
title_short Heap leach modeling: Analysis and optimization with CFD technology
title_full Heap leach modeling: Analysis and optimization with CFD technology
title_fullStr Heap leach modeling: Analysis and optimization with CFD technology
title_full_unstemmed Heap leach modeling: Analysis and optimization with CFD technology
title_sort Heap leach modeling: Analysis and optimization with CFD technology
author_id_str_mv f045e194e1b759f3aac9e15caf8f293e
author_id_fullname_str_mv f045e194e1b759f3aac9e15caf8f293e_***_Diane McBride
author Diane McBride
author2 D. McBride
J.E. Gebhart
T.N. Croft
M. Cross
Diane McBride
format Conference Paper/Proceeding/Abstract
container_title IMPC 2018 - 29th International Mineral Processing Congress
container_start_page 2809
publishDate 2019
institution Swansea University
isbn 978-703022711-9
publisher 29th International Mineral Processing Congress, IMPC 2018
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
url http://impc2018.com/
document_store_str 0
active_str 0
description Heap leaching is well-established as a relatively low-cost and low-energy method of extracting metals from low grade ores. However, the design methodology, attention to the engineering details during heap construction and the long time scale in metal recovery makes the process susceptible to significant variation in the success of a heap leach operation. Often the laboratory predicted recovery rates are not achieved on site due to poor understanding of the complex physics of flow and coupled solid-liquid-thermal reactions within the multi-dimensional heterogeneous ore body. Given the large scale of commercial operations, small changes in metal recovery can substantially change the operating profitability. While there are a variety of approaches to heap leach modeling, computational fluid dynamics (CFD) modeling coupled with leach kinetic models offers a methodology to describe and understand the complexities of heap leaching. The CFD model uses leach kinetics specific for the mineralogy of the ore, including gangue chemistry, and provides an energy balance to calculate and predict temperature. Coupled with the CFD model's inherent capability for modeling complex fluid flow, the physics and the chemistry of the heap can be simulated. This provides a tool for engineering design, as well as forecasting heap production under different scenarios. The calibrated model is used to simulate a three-dimensional test heap under fluctuating meteorological data, such as precipitation events, periodic solution application, and notably temperature. These simulations provide support for a methodology to design and engineer heap leaching of low grade copper sulfide ore.
published_date 2019-12-31T03:58:38Z
_version_ 1763752980552613888
score 11.037166

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