Hostname: page-component-848d4c4894-r5zm4 Total loading time: 0 Render date: 2024-06-23T05:26:34.019Z Has data issue: false hasContentIssue false
  • English
  • Français

Spectroscopic studies of kaolin from different Brazilian regions

Published online by Cambridge University Press:  09 July 2018

R. B. Scorzelli ,
L. C. Bertolino ,
A. B. Luz ,
M. Duttine ,
F. A. N. G. Silva  and
P. Munayco
R. B. Scorzelli*
Affiliation:
C.B.P.F., Rua Dr. Xavier Sigaud, 150, 22290-180 Rio de Janeiro, Brazil
L. C. Bertolino
Affiliation:
U.E.R.J., Rua Francisco Portela, 794. Paraíso, São Gonçalo, Rio de Janeiro, Brazil
A. B. Luz
Affiliation:
C.E.T.E.M., Av. Ipê, 900, Ilha da Cidade Universitária, Rio de Janeiro, Brazil
M. Duttine
Affiliation:
U.E.R.J., Rua Francisco Portela, 794. Paraíso, São Gonçalo, Rio de Janeiro, Brazil
F. A. N. G. Silva
Affiliation:
C.E.T.E.M., Av. Ipê, 900, Ilha da Cidade Universitária, Rio de Janeiro, Brazil
P. Munayco
Affiliation:
C.B.P.F., Rua Dr. Xavier Sigaud, 150, 22290-180 Rio de Janeiro, Brazil
*
*E-mail: cbertolino@uol.com.br
Get access Rights & Permissions [Opens in a new window]

Abstract

Over the past several decades, kaolin has been used intensively in the paper industry as a coating and filler material. These applications require kaolin of a high brightness grade, which depends heavily on the level of impurities (mainly Fe-bearing minerals such as Fe oxides and hydroxides) and may be improved by beneficiation processes involving grain-size classification, magnetic separation and chemical treatments. This investigation was carried out on five Brazilian kaolin samples of different geographical and geological origins. Granulometric, mineralogical, chemical and physical characterizations were performed on all samples before and after the beneficiation process.

Chemical compositions were determined by X-ray fluorescence and the most important crystalline phases were identified using X-ray diffraction. Kaolinite is the dominant mineralogical phase with minor amounts of muscovite and quartz. The nature of Fe impurities was investigated by electron spin resonance and 57Fe Mössbauer spectroscopy. For all studied kaolin samples, Fe ions (Fe3+ and Fe2+) are present in variable amounts, in the kaolinite structure and also in Fe oxides (magnetite, hematite and goethite). The beneficiation procedure aims to remove these Fe oxides and was found to be most efficient for the Mogi das Cruzes kaolin. The Seridó kaolin had the best whiteness index observed among the analysed samples.

Keywords

kaoliniteFe impurities57Fe Mössbauer spectroscopyelectron spin resonanceXRDXRF
Type
Research Article
Information
Clay Minerals , Volume 43 , Issue 1 , March 2008 , pp. 129 - 135
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Balan, E., Allard, T., Boizot, B., Morin, G. & Muller, J.P. (1999) Structural Fe3+ in natural kaolinites: new insights from electron paramagnetic resonance spectra fitting at X- and Q-band frequencies. Clays and Clay Minerals, 47, 605–616.Google Scholar
Brand, R.A. (1992) NORMOS, Mössbauer fitting program. Google Scholar
Brindley, G.W., Kao, C.C., Harrison, J.L., Lipsicas, M. & Raythatha, R. (1986). Relation between structural disorder and other characteristics of kaolinites and dickites. Clays and Clay Minerals, 34, 239–249.CrossRefGoogle Scholar
Chandrasekhar, S. & Ramaswamy, S. (2006) Iron minerals and their influence on the optical properties of two Indian kaolins. Applied Clay Science, 33, 269–277.Google Scholar
Clozel, B., Allard, T. & Muller, J.P. (1994) Nature and stability of radiation-induced defects in natural kaolinites: new results and a reappraisal of published works. Clays and Clay Minerals, 42, 657–666.CrossRefGoogle Scholar
Gonzalez, J.A. & Ruiz, M.C. (2006) Bleaching of kaolins and clays by chlorination of iron and titanium. Applied Clay Science, 33, 219–229.Google Scholar
Guskos, N., Papadopoulos, G.J., Likodimos, V., Patapis, S., Yarmis, D., Przepiera, A., Przepiera, K., Majszczyk, J., Typek, J., Wabia, M., Aidinis, K. & Drazek, Z. (2002) Photoacoustic, EPR and electrical conductivity investigations of three synthetic mineral pigments: hematite, goethite and magnetite. Materials Research Bulletin, 37, 1051–1061.Google Scholar
Murad, E. & Cashion, J. (2004) Mössbauer Spectroscopy of Environmental Materials and their Industrial Utilization. Kluwer Academic Publishers, Boston, Dordrecht, New York, London, 418 pp.Google Scholar
Murray, C.B. (2002) Industrial clays case study. Mining, Minerals and Sustainable Development, 64, 1–9.Google Scholar
Murray, H.H., Alves, C.A. & Bastos, C.H. (2007) Mining, processing and applications of the Capim Basin kaolin, Brazil. Clay Minerals, 42, 145–151.Google Scholar
Sei, J., Abba Touré, A., Olivier-Fourcade, J., Quiquampoix, H., Staunton, S., Jumas, J.C. & Womes, M. (2004) Characterisation of kaolinitic clays from the Ivory Coast (West Africa). Applied Clay Science, 27, 235–239.Google Scholar
Wilson, I.R. (2005) Kaolin Review. Mining Annual Review for 2004.Google Scholar
Wilson, I.R., De Souza Santos, H. & De Souza Santos, P. (2006) Kaolin and halloysite deposits of Brazil. Clay Minerals, 41, 697–716.Google Scholar