Characterization of bauxite pisoliths

Pannirselvam, M, Tardio, J, Garg, A, Antolasic, F, Grocott, S and Bhargava, S 2009, 'Characterization of bauxite pisoliths', in T. Heyns (ed.) Proceedings of Engineering Our Future: Are we Up to the Challenge?, CHEMECA 2009, Perth, Australia, 27-30 September 2009, pp. 2461-2470.


Document type: Conference Paper
Collection: Conference Papers

Title Characterization of bauxite pisoliths
Author(s) Pannirselvam, M
Tardio, J
Garg, A
Antolasic, F
Grocott, S
Bhargava, S
Year 2009
Conference name Chemeca 2009
Conference location Perth, Australia
Conference dates 27-30 September 2009
Proceedings title Proceedings of Engineering Our Future: Are we Up to the Challenge?, CHEMECA 2009
Editor(s) T. Heyns
Publisher Engineers Australia
Place of publication Australia
Start page 2461
End page 2470
Total pages 10
Abstract Bauxite mainly consists of the major minerals gibbsite, boehmite, diaspore, kaolinite, quartz, goethite and hematite. Large quantities of bauxite often occur in the form of small balls (pisolites). Mineralogical analyses of ores can be complicated, especially when minerals of very similar elemental composition are present and sophisticated techniques such as bulk x-ray diffraction (XRD) are usually required to accurately identify the types of minerals present. Bulk x-ray diffraction (XRD) is however time consuming, prohibiting large scale routine analysis. In this context, Fourier Transform Infra-Red (FTIR) imaging has emerged as a valuable technique for the examination of various mineral phases and for phase mapping. In this paper, we present results on FTIR imaging of bauxite in the form of complex pisoliths. Synchrotron FTIR results were used to validate the results of FTIR imaging. General Area Diffraction Detector System (GADDS) was also used to map boehmite in bauxite pisoliths. Boehmite inclusions in the size of 5 to 20 microns were easily detected by FTIR imaging and the results were further confirmed by Synchrotron FTIR and the general area micro x-ray diffraction technique. FTIR mapping was also able to reveal the two dimensional location and mineralogical association of the mineral phases in bauxite pisoliths.
Subjects Chemical Sciences not elsewhere classified
Keyword(s) Bauxite
pisoliths
FTIR- Imaging
synchrotron
micro x-ray diffraction
Copyright notice © 2009 Engineers Australia
ISBN 9780858259225
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