Author(s):
1. Dragana Kostić, University of East Sarajevo, Faculty of Technology, Republic of Srpska, Bosnia and Herzegovina
2. Mitar Perušić, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina
3. Ljubiša Balanović, Tehnički fakultet u Boru, Serbia
4. Srećko Stopić, RWTH Aachen University, Germany
5. Duško Kostić, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina
6. Vladimir Damjanovic, Alumina doo, , Republic of Srpska, Bosnia and Herzegovina
7. Dragana Kešelj, Republic of Srpska, Bosnia and Herzegovina
8. Slavko Smiljanić, Republic of Srpska, Bosnia and Herzegovina
9. Radislav Filipovic, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina

Abstract:
In the research, the residues from the leaching of bauxite in the Bayer process, are the so-called red mud samples. The samples were subjected to chemical methods to determine the concentrations of components in red mud, such as SiO 2 , Fe 2 O 3 , Al 2 O 3 , CaO and TiO 2 . Spectrophotometric and gravimetric methods were used. X-ray diffraction (XRD) analysis provided results regarding the identification of crystal structure in red mud, specifically the compounds comprising its composition. Additionally, analysis of red mud using scanning electron microscopy (SEM and EDS) revealed the microscopic appearance of red mud at high magnification. Based on the experimental data, it was concluded that the red mud contains the most mineral forms of iron, with over 50%, followed by aluminium, then silicon, calcium and the particularly interesting mineral forms of titanium, respectively. Titanium mineral form constitutes the smallest proportion, among those examined, approximately 5.5%. XRD analysis identified compounds present in red mud, including hematite (Fe 2 O 3 ), hydro-granate (Ca 3 Al 3,5 H 9,785 O 12 ), perovskite (CaTiO 3 ), cancrinite (Na 4 Al 3 Si 3 O 14,35 ), diaspore (AlOOH) i boehmite (AlOOH).

Key words:
Bayer process,bauxite,chemical analysis,red mud,titanium (Ti)

Thematic field:
SYMPOSIUM A - Science of matter, condensed matter and physics of solid states

Date of abstract submission:
28.06.2024.

Conference:
Contemporary Materials 2024 - Savremeni Materijali

Applied paper from author