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Chemical treatment of kaolin. Case study of kaolin from the Tamazert– Jijel mine

Mohamed Chouafa 1  ,  
 
1
Department of Mining, Mineral Processing and Environmental Research Laboratory, Annaba University, Badji Mokhtar, Algeria
2
Department of Mining, Natural Resources and Development Laboratory, Annaba University, Badji Mokhtar, Algeria
Mining Science 2015;22:171–180
KEYWORDS:
ABSTRACT:
The Tamazert-Jijel kaolin deposit is located in eastern Algeria, It was formed during a process of hydro-thermal alteration of feldspars rich in potassium. Kaolin, obtained at the mine, mainly contains varying amounts of impurities such as iron oxide (Fe2O3) and anatase (TiO2). These components negatively affect the quality of the commercial product. This research was performed to improve the quality of kaolin to be used in the paper industry with the goal of reducing the impurities of iron and titanium oxides. Different sized fractions of the original sample were analyzed by XRD. The results obtained showed that the mineralogical composition is: quartz, muscovite, kaolinite, dolomite, albite and orthoclase. Kaolin, like all clays, has a thin dissemination of minerals throughout it. After processing kaolin, the particle size fraction of less than 45μm, corresponding to the liberation mesh size, was retained for purification by chemical treatment with different acids of different concentrations (hydrochloric acid, sulfuric acid, acetic acid), heated to boiling point temperatures. The kaolin samples treated with the various acids above were analyzed by X-ray fluorescence and by XRD. The results obtained from the sample treated with hydrochloric acid show that the iron oxide content of acid is reduced by 1.65% to 0.88%. Meanwhile, the brightness of the sample reached 90% under the effect of the treatment with hydrochloric acid at concentration of 2 mole/dm3.
CORRESPONDING AUTHOR:
Mohamed Chouafa   
Department of Mining, Mineral Processing and Environmental Research Laboratory, Annaba University, Badji Mokhtar, Algeria
 
REFERENCES (17):
1. Asmatulu R., 2002. Removal of the Discoloring Contaminants of an East Georgia Kaolin Clay and its Dewatering, Turkish Journal of Engineering & Environmental Sciences vol. 26, No 5, pp. 447- 453.
2. Abdel-Khalek N.A. Arafa M.A. Hassan F., 1996. Froth Flotation of Ultrafine Egyptian Kaolin Clay, Proceedings of the 6th international symposium, Kusadasi, Turkey,, pp. 395-400.
3. Cambier P., Picot C., 1988, Nature des liaisons kaolinite-oxyde de fer au sein des microagregatsd'un sol ferralitique, Science du Sol, vol. 26,No. 4, pp. 223-238.
4. Carroll D., Starkey H.C., 1971, Reactivity of clay minerals with acids and alkalies. Clays and Clay Min-erals, 19, 321-333.
5. Cieśla A.,2012. Magnetic separation of kaolin clay using free helium superconducting magnet, Przegląd El-ektrotechniczny, R. 88 NR 12/b, AGH – University of Science and Technology, Kraków, Poland, 50-53.
6. Eze K.A., Nwadiogbu J.O. Nwankwere E.T., 2012, Effect of acid treatments on the physico chemical properties of kaolin clay, Archives of Applied Science Research, vol. 4 No. 2, pp. 792-794.
7. Franklin Camp Bacon Jr.,1984. Procédé de la flottation par moussage, EP 0 104 099 A2, 1984.
8. Koster R., Schreck B., Rybinski W., Dobiás B., 1992. New reagent systems for the flotation of kaolinite. Minerals Engineering 5, 445- 456.
9. Larroyd F., Petter C.O., Sampaio C.H., 2002, Purification of north Brazilian kaolin by selective floccula-tion, Minerals Engineering, vol. 15, No. 12, pp. 1191-1192.
10. Luz A.B., Middea A., 2004. Purification of kaolin by selective flocculation, Proceedings of the fifth Ubc- Mcgill biennal international symposium on fundamentals of mineral, 43rd Annual Conference of Metallurgists of CIM, august 22-25 (2004) Hamilton, Ontario, Canada, pp. 243-253.
11. Murray H.H., 1980, Major kaolin processing developments, International Journal of Mineral Processing 7, 263-274.
12. Newns A., Pascoe R.D., 2002. Influence of path length and slurry velocity on the removal of iron from kaolin using a high gradient magnetic separator, Minerals Engineering, vol. 15, No. 12, pp. 465- 467.
13. Pradip R.A., Kulkarni S., Gundiah B.M., Moudgil, 1991. Selective flocculation of Kaolinite from mixtures with tribasic calcium phosphate using hydrolyzed polyacrylamides, International Journal of Mineral Processing 32, 259-270.
14. Ravishankar S.A., Pradip Khosla N.K., 1995. Selective flocculation of iron oxide from its synthetic mixtures with clays a comparison of polyacrylic acid and starch polymers, International journal of mineral processing, 43, 235-247.
15. Sharad M., 2002. Kaolin Flotation. Journal of Colloid and Interface Science 256, 153–158.
16. Yoon R.H., Nagaraj D.R, Wang S.S., Hilderband T.M., 1992. Benefication of kaolin clay by froth flotation using hydroxamate collectors, Minerals Engineering 5, 457- 467.
17. Shi J.C.S., 1986, Method of beneficiating kaolin clay utilizing ammonium salts, Germany Patent No 4604369.
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