Utilizing nano-computed tomography to characterize the structural nature of industrial minerals
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A. Razavi
Anita Razavi received a bachelor’s degree in Medical Technology from the Koblenz University of Applied Sciences and a master’s degree in applied physics at the University of Koblenz-Landau. Subsequently, she began her PhD in the field of X-ray computed tomography in the refractory industry.
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A. Stein
Alena Stein studied Mathematics and Chemistry at the University of Koblenz-Landau. She then worked there as a research assistant and completed her PhD in the field of raw material processing in July 2023. Since August 2023, she has been working as a project manager at the Research Institute for Glass and Ceramics (FGK).
Abstract
X-ray computed tomography (XRT) is a nondestructive and thus reproducible examination method allowing the three-dimensional (3D) investigation of the internal and external structures of objects regardless of their material and geometry. In the present study, XRT was used to investigate the influence of hydrochloric acid leaching on the composition and constitution of iron-rich bauxite grains.
Reducing the iron content in raw bauxites by acid leaching is a promising method for the beneficiation of iron-rich bauxites for subsequent use in the refractory industry. Not only the effect of the leaching process on the chemical composition of the bauxites, but also aspects such as the acid’s influence on the mineralogical composition and the resulting porosity of the individual grains have hardly been taken into account so far. To address these issues, various bauxites were examined before and after acid leaching using XRT analysis and specifically characterized with regard to their constitution.
Kurzfassung
Die Röntgen-Computertomographie (XRT) ist eine zerstörungsfreie und damit reproduzierbare Untersuchungsmethode, mit der innere und äußere Strukturen von Objekten, unabhängig von ihrem Material und ihrer Geometrie, dreidimensional (3D) untersucht werden können. In der vorliegenden Arbeit wurde die XRT genutzt, um gezielt den Einfluss einer Salzsäurelaugung eisenreicher Bauxite auf die Kornzusammensetzung und -konstitution des Rohstoffs zu untersuchen.
Die Säurelaugung zur Reduzierung des Eisengehaltes in Roh-Bauxiten stellt eine vielversprechende Methode zur Aufbereitung von eisenreichen Bauxiten für den späteren Einsatz in der Feuerfestindustrie dar. Neben der Auswirkung des Laugungsprozesses auf die chemische Zusammensetzung der Bauxite wurden bisher Aspekte wie der Einfluss der Säure auf die mineralogische Zusammensetzung und die resultierende Porosität der einzelnen Körner kaum berücksichtigt. Um dies zu untersuchen, wurden verschiedene Bauxite vor und nach ihrer Säurelaugung mittels XRT-Analyse untersucht und gezielt auf deren Konstitution hin charakterisiert.
About the authors
Anita Razavi received a bachelor’s degree in Medical Technology from the Koblenz University of Applied Sciences and a master’s degree in applied physics at the University of Koblenz-Landau. Subsequently, she began her PhD in the field of X-ray computed tomography in the refractory industry.
Alena Stein studied Mathematics and Chemistry at the University of Koblenz-Landau. She then worked there as a research assistant and completed her PhD in the field of raw material processing in July 2023. Since August 2023, she has been working as a project manager at the Research Institute for Glass and Ceramics (FGK).
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© 2024 Walter de Gruyter GmbH, Berlin/Boston, Germany
Articles in the same Issue
- Inhalt
- Editorial
- Editorial
- Metallography of tailings from the Mansfeld copper mining area
- Enhancing precision and safety in metallographic sample preparation: Reduce the stochasticity and workload with robotization
- Electropolishing study of metastable austenitic steel AISI 347 for EBSD analyses
- Examinations on small bronze items from the Hallstatt period burial ground at Mitterkirchen in Upper Austria
- In situ stereomicroscopy chemical and color etching
- Quantification of forming-induced damage in case-hardening steel AISI 5115 by advanced SEM methods
- Microstructures of iron meteorites
- Old Woman Meteorite: microstructures, analyses, and stories
- Titanium alloys with a high β stabilizer content – sample preparation strategies and micrographs
- Microstructural changes in the welding of titanium-stabilized steels
- Development of a preparation method for Bronze Age flanged axes
- Challenges and possibilities of the manual metallographic serial sectioning process using the example of a quantitative microstructural analysis of graphite in cast iron
- Effects of heat treatment on the microstructure and corrosion behavior of manganese aluminum bronzes
- Utilizing nano-computed tomography to characterize the structural nature of industrial minerals
- Use of mobile metallography to assess the extent of damage to high temperature components in power plants
- Picture of the Month
- Picture of the Month
- News
- News
- Meeting Diary
- Meeting Diary
Articles in the same Issue
- Inhalt
- Editorial
- Editorial
- Metallography of tailings from the Mansfeld copper mining area
- Enhancing precision and safety in metallographic sample preparation: Reduce the stochasticity and workload with robotization
- Electropolishing study of metastable austenitic steel AISI 347 for EBSD analyses
- Examinations on small bronze items from the Hallstatt period burial ground at Mitterkirchen in Upper Austria
- In situ stereomicroscopy chemical and color etching
- Quantification of forming-induced damage in case-hardening steel AISI 5115 by advanced SEM methods
- Microstructures of iron meteorites
- Old Woman Meteorite: microstructures, analyses, and stories
- Titanium alloys with a high β stabilizer content – sample preparation strategies and micrographs
- Microstructural changes in the welding of titanium-stabilized steels
- Development of a preparation method for Bronze Age flanged axes
- Challenges and possibilities of the manual metallographic serial sectioning process using the example of a quantitative microstructural analysis of graphite in cast iron
- Effects of heat treatment on the microstructure and corrosion behavior of manganese aluminum bronzes
- Utilizing nano-computed tomography to characterize the structural nature of industrial minerals
- Use of mobile metallography to assess the extent of damage to high temperature components in power plants
- Picture of the Month
- Picture of the Month
- News
- News
- Meeting Diary
- Meeting Diary
