CHEMICAL-MINERАLOGICAL CHARACTERIZATION OF BAUXITES FROM DIFFERENT DEPOSITS

Authors

  • Gordana Оstojić Company „Alumina” d. o. o. Zvornik, Karakaj, 75400 Zvornik, Republic of Srpska
  • Dragica Lazić Faculty of Technology Zvornik, University of East Sarajevo, Karakaj бб, 75400 Zvornik, Republic of Srpska
  • Branko Škundrić Аcademy of Sciences and Arts of Republic of Srpska, Bana Lazarevića1, 78 000 Banja Luka, Republic of Srpska
  • Jelena Penavin Škundrić Faculty of Technology, University of Banja Luka, Vojvode Stepe Stepanovića 73, 78000 Banja Luka, Republic of Srpska
  • Slavica Sladojević Faculty of Technology, University of Banja Luka, Vojvode Stepe Stepanovića 73, 78000 Banja Luka, Republic of Srpska
  • Dragana Kešelj 2 Faculty of Technology Zvornik, University of East Sarajevo, Karakaj бб, 75400 Zvornik, Republic of Srpska
  • Dragana Blagojević 5 Faculty of Sciences, University of Banja Luka, Mladena Stojanovića 2, 78000 Banja Luka, Republic of Srpska

DOI:

https://doi.org/10.7251/cm.v1i5.1503

Abstract

From the aspect of their chemical and mineralogical composition, bauxites are very complex multicomponent raw materials. The paper presents the characterization of bauxite from several different deposits: Brazil, Milići, Čitluk and Kosovo. Chemical characteristics were determined by a combination of different analytical methods: gravimetry, potentiometric titration, atomic absorption spectroscopy (AAS) and UV-VIS spectrophotometry. Mineralogical composition was determined using X-ray diffraction and thermal analysis methods. Chemical and structural characterization is complemented by the results of scanning electron microscopy with EDX analysis. The information obtained was used for the assessment of the quality of investigated bauxites from the aspect of their application in the production of alumina.

References

[1] R. Vračar, Ž. Živković, Еxtractive metallurgy of aluminium, Naučna knjiga, Belgrade 1993, 1−14.

[2] P. Petrovski, Introduction to x-ray diffraction and mineral x-ray analysis of cement, Hijatus, Zenica, 2006, 38−48.

[3] N. Dani, M. L. Q. Formoso, A. Decarreau, A. Meunier, Nordstrandite in bauxite derived from phonolite, lages Santa Catarina, Brazil, Clays and Clay Minerals, Vol. 49−3 (2001) 216−226.

[4] I. S. Cissé, J. Ge, Determination of Bauxite’s phases by the bomb digest method at Kamsar laboratory ISO 9002 (Guinea), Journal of American Science, Vol. 6−6 (2010) 139−145.

[5] D. Lаzić, J. Penаvin Škundrić,
Lj. Vаsiljević, S. Slаdojević, G. Ostojić, D. Mаrjаnović, The Effect of Temperature on the Degree of Leaching in Indian Bauxite, VI Scientific-expert symposium with international participation „Metal and non-metal materials”, 2006, 323−328.

[6] F. Feret, M. Authier-Martin, I. Sajo, Quantitative phase analysis of Bidi-Koum bauxites (Guinea), Clays and Clay Minerals, Vol. 45−3 (1997) 418−427.

[7] Y. V. Ramana, R. C. Patnaik, Application of thermogravimetric analysis for estimation of tri-hydrate alumina in central Indian bauxites - an alternative for classical techniques, Light Metals, (2011) 211−214.

Published

2014-09-25