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Research on Leaching of Aluminum From Fly Ash Using Sulfuric Acid

Caijuan Huang

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Abstract

The leaching of aluminum from fly ash using acid solution in self-made autoclave was studied.The influence of acid concentration,acid excessive coefficient,leaching temperature and leaching time on leaching of Al2O3 were investigated.Results showed that the leaching rate of Al2O3 was over 90% at the conditions of leaching temperature of 180 ℃,leaching time of 5 h,liquid-solid ratio of 5∶1,acid excessive coefficient of 1.45 and initial concentration of sulfuric acid of 35%.

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What this paper is about

The leaching of aluminum from fly ash using acid solution in self-made autoclave was studied.The influence of acid concentration,acid excessive coefficient,leaching temperature and leaching time on leaching of Al2O3 were investigated.Results showed that the leaching rate of Al2O3 was over 90% at the conditions of leaching temperature of 180 ℃,leaching time of 5 h,liquid-solid ratio of 5∶1,acid excessive coefficient of 1.45 and initial concentration of sulfuric acid of 35%.

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Available abstract

The leaching of aluminum from fly ash using acid solution in self-made autoclave was studied.The influence of acid concentration,acid excessive coefficient,leaching temperature and leaching time on leaching of Al2O3 were investigated.Results showed that the leaching rate of Al2O3 was over 90% at the conditions of leaching temperature of 180 ℃,leaching time of 5 h,liquid-solid ratio of 5∶1,acid excessive coefficient of 1.45 and initial concentration of sulfuric acid of 35%.

Key concepts: Leaching (pedology), Sulfuric acid, Fly ash, Chemistry, Aluminium, Inorganic chemistry, Environmental science, Soil science

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