Determination of Mineral Liberation of a Bauxite Ore Based on 3D Compositional and Textural Characteristics Using X-ray Microtomography

Microscope-based automated image analysis systems have been used to obtain data regarding mineral liberation. However, this kind of analysis leads to stereological bias due to the intrinsic two-dimensionality characteristic of the technique. Three-dimensional imaging techniques such as X-ray microto...

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Bibliographic Details
Published inMineral processing and extractive metallurgy review Vol. 43; no. 8; pp. 978 - 988
Main Authors Ramos Oliveira, Guilherme José, Horta, Daniela Gomes, da Silva, Fabiane Leocádia, von Krüger, Fernando Leopoldo, Araújo, Fernando Gabriel da Silva, Mazzinghy, Douglas Batista
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis 17.11.2022
Taylor & Francis Ltd
Subjects
Bauxite
Bayer process
Image analysis
Image processing
Imaging techniques
Mineral liberation
stereological bias
X ray microtomography
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Summary:Microscope-based automated image analysis systems have been used to obtain data regarding mineral liberation. However, this kind of analysis leads to stereological bias due to the intrinsic two-dimensionality characteristic of the technique. Three-dimensional imaging techniques such as X-ray microtomography comes as an alternative method to measure liberation. We explored the potentiality of high-resolution X-ray microtomography to investigate the characteristics of liberation of a Brazilian bauxite. Grade distributions in 2D and 3D were correspondent when all possible cross-sections were considered in 2D. However, 2D surface exposure did not converge accurately to the 3D method due to the loss of 3D information.
ISSN:0882-7508
1547-7401
DOI:10.1080/08827508.2021.1986707