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Particle generation for geometallurgical process modeling
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering. (MiMeR)ORCID iD: 0000-0003-4800-9533
2017 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

A geometallurgical model is the combination of a spatial model representing an ore deposit and a process model representing the comminution and concentration steps in beneficiation. The process model itself usually consists of several unit models. Each of these unit models operates at a given level of detail in material characterization - from bulk chemical elements, elements by size, bulk minerals and minerals by size to the liberation level that introduces particles as the basic entity for simulation (Paper 1).

In current state-of-the-art process simulation, few unit models are defined at the particle level because these models are complex to design at a more fundamental level of detail, liberation data is hard to measure accurately and large computational power is required to process the many particles in a flow sheet. Computational cost is a consequence of the intrinsic complexity of the unit models. Mineral liberation data depends on the quality of the sampling and the polishing, the settings and stability of the instrument and the processing of the data.

This study introduces new tools to simulate a population of mineral particles based on intrinsic characteristics of the feed ore. Features are extracted at the meso-textural level (drill cores) (Paper 2), put in relation to their micro-textures before breakage and after breakage (Paper 3). The result is a population of mineral particles stored in a file format compatible to import into process simulation software. The results show that the approach is relevant and can be generalized towards new characterization methods.

The theory of image representation, analysis and ore texture simulation is briefly introduced and linked to 1-point, 2-point, and multiple-point methods from spatial statistics. A breakage mechanism is presented as a cellular automaton. Experimental data and examples are taken from a copper-gold deposit with a chalcopyrite flotation circuit, an iron ore deposit with a magnetic separation process.

This study is covering a part of a larger research program, PREP (Primary resource efficiency by enhanced prediction).

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2017. , 76 p.
Series
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757
Keyword [en]
Geometallurgy, ore texture, texture classification, breakage simulation, process modeling
National Category
Mineral and Mine Engineering
Research subject
Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-63270ISBN: 978-91-7583-904-2 (print)ISBN: 978-91-7583-905-9 (electronic)OAI: oai:DiVA.org:ltu-63270DiVA: diva2:1093527
Presentation
2017-06-02, C305, Luleå, 10:00 (English)
Supervisors
Projects
PREP
Funder
VINNOVA, 155152
Available from: 2017-05-08 Created: 2017-05-08 Last updated: 2017-05-23Bibliographically approved
List of papers
1. How to Build a Process Model in a Geometallurgical Program?
Open this publication in new window or tab >>How to Build a Process Model in a Geometallurgical Program?
2015 (English)In: Mineral Resources in a Sustainable World / [ed] A.S. Andre-Mayer; M. Cathelineau; P. Muchez; E. Pirard; S. Sindern, 2015, 1419-1422 p.Conference paper, Published paper (Refereed)
Abstract [en]

This work presents a literature review on ways to acquire relevant experimental data for the process model of a geometallurgical program. It identifies the needs in several unit models and proposes ideas for future developments

National Category
Metallurgy and Metallic Materials
Research subject
Mineral Processing
Identifiers
urn:nbn:se:ltu:diva-37309 (URN)b49f7271-0a4d-4c65-b6bd-9ef4a02f9764 (Local ID)978-2-85555-066-4 (ISBN)b49f7271-0a4d-4c65-b6bd-9ef4a02f9764 (Archive number)b49f7271-0a4d-4c65-b6bd-9ef4a02f9764 (OAI)
Conference
SGA Biennial Meeting on Mineral Resources in a Sustainable World : 24/08/2015 - 27/08/2015
Note
Validerad; 2016; Nivå 1; 20160621 (andbra)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-05-08Bibliographically approved
2. Texture-based liberation models for comminution
Open this publication in new window or tab >>Texture-based liberation models for comminution
2017 (English)In: Konferens i Mineralteknik 2017: Luleå 7-8 februari 2017, Luleå, 2017, 83-96 p.Conference paper, Abstract (Other academic)
Abstract [en]

The relation between breakage mechanisms and liberation is critical in mineral processing. Recent studies underline the importance of texture in liberation. This study reviews relevant liberation models and proposes a new method for generating particles using image processing algorithms. One new texture simulation method and its relevance for liberation simulation is also introduced.

Place, publisher, year, edition, pages
Luleå: , 2017
Keyword
geometallurgy, texture, mineral processing, simulation
National Category
Mineral and Mine Engineering
Identifiers
urn:nbn:se:ltu:diva-63205 (URN)
Conference
Konferens i Mineralteknik 2017, Luleå 7-8 februari 2017
Projects
PREP
Funder
VINNOVA, 155152
Available from: 2017-05-01 Created: 2017-05-01 Last updated: 2017-05-08Bibliographically approved

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