Aluminum extraction from aluminum industrial wastes |
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| Authors: | A M Amer |
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| Affiliation: | (1) Agronomy Department, Purdue University, 915 West State St., West Lafayette, IN 47907-2054, USA;(2) USDA-ARS, National Soil Erosion Research Laboratory, 275 South Russell St., West Lafayette, IN 47907, USA |
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| Abstract: | Aluminum dross tailings, an industrial waste from the Egyptian Aluminum Company (Egyptalum), was used to produce two types
of alums: aluminum sulfate alum (Al2(SO4)3·12H2O) and ammonium aluminum alum {(NH4)2SO4AL2 (SO4)3·24H2O}. This was carried out in two processes. The first involves leaching the impurities using diluted H2SO4 with different solid/liquid ratios at different temperatures to dissolve the impurities present in the starting material
in the form of aluminum sulfates. The second process is the extraction of aluminum (as aluminum sulfate) from the purified
aluminum dross tailings thus produced. This was carried out in an autoclave. The effects of temperature, time of reaction,
and acid concentration on pressure leaching and extraction processes were studied in order to specify the optimum conditions
to be applied in the bench scale production as well as the kinetics of leaching process. |
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