ANALYSIS AND INITIAL QUALITATIVE ASSESSMENT OF RED MUD IN THE BAYER PROCESS
1. ms Dragana Kostić, University of East Sarajevo, Faculty of Technology,
Republic of Srpska, Bosnia and Herzegovina
2. Doktor tehničkih nauka Mitar Perušić, Faculty of Technology - University of East Sarajevo,
Republic of Srpska, Bosnia and Herzegovina
3. dr Ljubiša Balanović, Tehnički fakultet u Boru, Serbia
4. prof Srećko Stopić, RWTH Aachen University, Germany
5. dr Duško Kostić, Faculty of Technology - University of East Sarajevo,
Republic of Srpska, Bosnia and Herzegovina
6. mr Vladimir Damjanovic, Alumina doo, ,
Republic of Srpska, Bosnia and Herzegovina
7. Dragana Kešelj,
Republic of Srpska, Bosnia and Herzegovina
8. dr Slavko Smiljanić,
Republic of Srpska, Bosnia and Herzegovina
9. dr Radislav Filipovic, Faculty of Technology - University of East Sarajevo,
Republic of Srpska, Bosnia and Herzegovina
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:
SIMPOZIJUM A - Nauka o materijalima, kondenzovane materije i fizika čvrstog stanja
Date:
28.06.2024.
Contemporary Materials 2024 - Savremeni Materijali
Paper file
(5.76 MB)