Dual-energy computed tomography for improved contrast on a polyphase graphitic ore

Krebbers, Leonard T.; Grozmani, Natalia; Lottermoser, Bernd G.; Schmitt, Robert H.

doi:10.1016/j.tmater.2023.100021

Cited by 1 publication

(2 citation statements)

References 42 publications

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“…Due to acquisition issues for ROM1, an image fusion approach of two test measurements was applied. Image fusion can be used to acquire dual-energy CT (DECT) data by the means of combining attenuation information from single-energy CT scans performed at different energy levels to enhance image contrast [35]. The datasets available in the present study were acquired at the same X-ray energy.…”

Section: Computed Tomographymentioning

confidence: 99%

“…The image noise in the CT data from ROM1 was improved through the fusion of two single CT scans at the same X-ray energy. When aiming to differentiate between as many phases as possible, DECT can also be considered, as it may improve the grayscale contrast between individual phases [35]. This, for example, could potentially reveal if scheelite is preferably attached to a specific hydrous phase as the high-voltage setting applied does decrease image contrast of lower X-ray absorbing phases.…”

Section: Ct Data Acquisitionmentioning

confidence: 99%

See 1 more Smart Citation

Computed Tomography of Scheelite Ore, Kara, Australia: Morphological Characterisation and Modal Mineralogy

Krebbers,

Hunt,

Lottermoser

2024

Minerals

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Metal ores are mineralogically characterised to understand their genesis in order to allow informed decisions on mineral processing and to recognise likely environmental risks upon mining. However, standard mineralogical techniques generate only two-dimensional information at best, which in addition may be subject to sampling and stereological errors. By contrast, computed tomography (CT) is a non-destructive imaging technique that allows three-dimensional analysis of solid materials. In the present study, two ore types of the Kara Fe-W deposit (Australia) were characterised using CT to examine their mineral texture and modal mineralogy as well as scheelite distribution and ore grade (WO3). The results show that scheelite is primarily associated with hydrous phases (e.g., epidote, chlorite, amphibole) and occurs as massive or disseminated mineral as well as vein-fill at minor and trace concentrations. This study demonstrates that CT of scheelite ore enables accurate 3D texture visualisation (volume, grain size distribution) and yields valid quantitative data on modal mineralogy and WO3 grade of individual ore samples. Consequently, CT analysis of scheelite-bearing ore provides information relevant for ore genesis studies and comminution strategies for the possible recovery of scheelite as a by-product from metalliferous ores.

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Section: Computed Tomographymentioning

confidence: 99%

Section: Ct Data Acquisitionmentioning

confidence: 99%