Article (Scientific journals)
Automated characterisation of intergrowth textures in mineral particles. A case study
Perez-Barnuevo, Laura; Pirard, Eric; Castroviejo, Ricardo
2013In Minerals Engineering
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Keywords :
liberation; process mineralogy; image analysis
Abstract :
[en] The characterisation of mineral texture has been a major concern for process mineralogists, as liberation characteristics of the ores are intimately related to the mineralogical texture. While a great effort has been done to automatically characterise texture in unbroken ores, the characterisation of textural attributes in mineral particles is usually descriptive. However, the quantitative characterisation of texture in mineral particles is essential to improve and predict the performance of minerallurgical processes (i.e. all the processes involved in the liberation and separation of the mineral of interest) and to achieve a more accurate geometallurgical model. Driven by this necessity of achieving a more complete characterisation of textural attributes in mineral particles, a methodology has been recently developed to automatically characterise the type of intergrowth between mineral phases within particles by means of digital image analysis. In this methodology, a set of minerallurgical indices has been developed to quantify different mineralogical features and to identify the intergrowth pattern by discriminant analysis. The paper shows the application of the methodology to the textural characterisation of chalcopyrite in the rougher concentrate of the Kansanshi copper mine (Zambia). In this sample, the variety of intergrowth patterns of chalcopyrite with the other minerals has been used to illustrate the methodology. The results obtained show that the method identifies the intergrowth type and provides quantitative information to achieve a complete and detailed mineralogical characterisation. Therefore, the use of this methodology as a routinely tool in automated mineralogy would contribute to a better understanding of the ore behaviour during liberation and separation processes.
Disciplines :
Geological, petroleum & mining engineering
Author, co-author :
Perez-Barnuevo, Laura;  Universidad Politecnica de Madrid
Pirard, Eric  ;  Université de Liège - ULiège > Département Argenco : Secteur GeMMe > Géoressources minérales & Imagerie géologique
Castroviejo, Ricardo;  Universidad Politecnica de Madrid
Language :
English
Title :
Automated characterisation of intergrowth textures in mineral particles. A case study
Alternative titles :
[fr] Caractérisation automatique des textures de particules minérales. Un cas d'étude
Publication date :
2013
Journal title :
Minerals Engineering
ISSN :
0892-6875
Publisher :
Pergamon Press - An Imprint of Elsevier Science, Oxford, United Kingdom
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
CAMEVA
Funders :
Ministerio de Educación y Ciencia, Madrid
Available on ORBi :
since 28 May 2013

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