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Optimization of the extraction of aluminum sulfate and ammonium aluminum sulfate alums from aluminum dross tailings

Published online by Cambridge University Press:  31 January 2011

M. A. Mohamed ,
M. E. Kassim  and
E. A. El-katatny
M. A. Mohamed
Affiliation:
Chemistry Department, Faculty of Science, South Valley University, Qena 83511, Egypt
M. E. Kassim
Affiliation:
Metallurgy Department, Faculty of Engineering, Assiut University, Assiut, Egypt
E. A. El-katatny
Affiliation:
Aluminium Company of Egypt, Nag-Hammady, Egypt
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Abstract

Aluminum dross tailings, an industrial waste from the Egyptian Aluminium Company (Egyptalum), were used to produce two types of alums, namely, aluminum sulfate alum and ammonium aluminum alum via two separate processes. The first process involved leaching the impurities using dilute H2SO4 at different solid/liquid ratios and temperatures in the form of soluble sulfates. Some dissolved aluminum was recovered as ammonium aluminum sulfate. The second process involved extraction of aluminum sulfate from the purified dross produced after leaching. This was carried out under atmospheric pressure using different concentrations of H2SO4. Influence of temperature, time of reaction, and acid concentration on leaching and extraction processes were studied. X-ray diffraction, atomic absorption spectrometry, and thermal analysis techniques were used.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 4 , April 1998 , pp. 1075 - 1083
Copyright
Copyright © Materials Research Society 1998

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References

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