Comparative study of iron ore characterisation using a scanning electron microscope and optical image analysis
| Autor: | Peter Austin, James Manuel, Michael John Peterson, A. Poliakov, Sarath Hapugoda, E. Donskoi |
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| Rok vydání: | 2013 |
| Předmět: |
Mineral
Goethite Scanning electron microscope QEMSCAN Metallurgy Mineralogy Hematite engineering.material Geotechnical Engineering and Engineering Geology chemistry.chemical_compound Iron ore chemistry Geochemistry and Petrology visual_art Particle-size distribution Earth and Planetary Sciences (miscellaneous) visual_art.visual_art_medium engineering Geology Magnetite |
| Zdroj: | Applied Earth Science. 122:217-229 |
| ISSN: | 1743-2758 0371-7453 |
| Popis: | In order to develop downstream processing routines for iron ore and to understand the behaviour of the ore during processing, extensive mineralogical characterisation is required. Microscopic analysis of polished sections is effective to determine mineral associations, mineral liberation and grain size distribution. There are two main imaging techniques used for the characterisation of iron ore, i.e. optical image analysis (OIA) and scanning electron microscopy (SEM). In this article, a QEMSCAN system is used as an example of SEM methodology and results obtained from it are compared against results obtained by the CSIRO Recognition3/Mineral3 OIA system. Both OIA and SEM systems have advantages and drawbacks. Even though the latest SEM systems can distinguish between major iron oxides and oxyhydroxides, it is still problematic for SEM systems to distinguish between iron ore minerals very close in oxygen content, e.g. hematite and hydrohematite, or between different types of goethite. Scanning elect... |
| Databáze: | OpenAIRE |
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