Extraction of Alumina from Coal Fly Ash with Sulfuric Acid Leaching Method

›› 2011, Vol. 11 ›› Issue (2): 254-258.

Extraction of Alumina from Coal Fly Ash with Sulfuric Acid Leaching Method

李来时刘瑛瑛翟玉春吴玉胜

沈阳市和平区和平北大街184号沈阳铝镁设计研究院沈阳市和平区和平北大街184号沈阳铝镁设计研究院沈阳工业大学材料科学与工程学院

收稿日期:2011-01-19 修回日期:2011-03-16 出版日期:2011-04-20 发布日期:2011-04-20
通讯作者: 李来时

Extraction of Alumina from Coal Fly Ash with Sulfuric Acid Leaching Method

LI Lai-shi LIU Ying-ying ZHAI Yu-chun WU Yu-sheng

Shenyang Aluminum and Magnesium Engineering and Research Institute Shenyang Aluminum and Magnesium Engineering and Research Institute School of Materials science and Engineering, Shenyang University of Technology

Received:2011-01-19 Revised:2011-03-16 Online:2011-04-20 Published:2011-04-20
Contact: LI Lai-shi

摘要/Abstract

摘要： Coarse g-Al2O3 powder was prepared through acid leaching, solid-liquid separation, crystallizing and aluminum sulfate decomposing processes using coal fly ash and concentrated sulfuric acid as raw materials. The metallurgy level Al2O3 can be obtained by disposing coarse g-Al2O3 powder with Bayer process. The optimum conditions of acid leaching process were determined by experiments. The extraction rate of Al2O3 can be stabilized at about 87% under these conditions. The thermodynamics and kinetics of sulfuric acid leaching process were studied with irreversible thermodynamics.

关键词: coal fly ash, alumina, sulfuric acid, leaching, thermodynamics, kinetics

Abstract: Coarse g-Al2O3 powder was prepared through acid leaching, solid-liquid separation, crystallizing and aluminum sulfate decomposing processes using coal fly ash and concentrated sulfuric acid as raw materials. The metallurgy level Al2O3 can be obtained by disposing coarse g-Al2O3 powder with Bayer process. The optimum conditions of acid leaching process were determined by experiments. The extraction rate of Al2O3 can be stabilized at about 87% under these conditions. The thermodynamics and kinetics of sulfuric acid leaching process were studied with irreversible thermodynamics.

Key words: coal fly ash, alumina, sulfuric acid, leaching, thermodynamics, kinetics

中图分类号:

TF821
X705

李来时刘瑛瑛翟玉春吴玉胜. Extraction of Alumina from Coal Fly Ash with Sulfuric Acid Leaching Method[J]. , 2011, 11(2): 254-258.

LI Lai-shi LIU Ying-ying ZHAI Yu-chun WU Yu-sheng. Extraction of Alumina from Coal Fly Ash with Sulfuric Acid Leaching Method[J]. , 2011, 11(2): 254-258.

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Extraction of Alumina from Coal Fly Ash with Sulfuric Acid Leaching Method

Extraction of Alumina from Coal Fly Ash with Sulfuric Acid Leaching Method

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