Effect of Temperature on Phase and Alumina Extraction Efficiency of the Product from Sintering Coal Fly Ash with Ammonium Sulfate

doi:10.1016/j.cjche.2014.09.008

›› 2014, Vol. 22 ›› Issue (11/12): 1363-1367.DOI: 10.1016/j.cjche.2014.09.008

• MATERLALS AND PRODUCT ENGINEERING • Previous Articles

Effect of Temperature on Phase and Alumina Extraction Efficiency of the Product from Sintering Coal Fly Ash with Ammonium Sulfate

Yusheng Wu¹, Ping Xu¹, Jiao Chen¹, Laishi Li², Mingchun Li ¹

1 Shenyang University of Technology, School of Materials Science and Engineering, Liaoning 110178, China;
2 Shenyang Aluminum and Magnesium Engineering and Research Institute, Liaoning 110001, China

Received:2013-06-24 Revised:2014-04-30 Online:2014-12-24 Published:2014-12-28
Supported by:
Supported by the Special Project for High-end CNC Machine Tools and Basic Manufacturing Equipment of China (2012ZX04007-021), Liaoning Excellent Talents in University (LR2014004) and the National Natural Science Foundation of China (51004071, 50804031).

Effect of Temperature on Phase and Alumina Extraction Efficiency of the Product from Sintering Coal Fly Ash with Ammonium Sulfate

Yusheng Wu¹, Ping Xu¹, Jiao Chen¹, Laishi Li², Mingchun Li ¹

1 Shenyang University of Technology, School of Materials Science and Engineering, Liaoning 110178, China;
2 Shenyang Aluminum and Magnesium Engineering and Research Institute, Liaoning 110001, China

通讯作者: Yusheng Wu
基金资助:
Supported by the Special Project for High-end CNC Machine Tools and Basic Manufacturing Equipment of China (2012ZX04007-021), Liaoning Excellent Talents in University (LR2014004) and the National Natural Science Foundation of China (51004071, 50804031).

Abstract

Abstract: A new developed technology for extracting alumina from coal fly ash was studied in this paper. In this technology, coal fly ash is first sintered with ammonium sulfate, forming ammonium aluminum sulfate in the resultant product, where alumina can be easily leached without using any strong acid or alkali. The products obtained under different sintering conditions were characterized by X-ray diffractometry. Alumina extraction efficiency of these products was also investigated. The results show that the sintering temperature and time substantially influence the phase composition and alumina extraction efficiency of sintered products, while the heating rate has little influence. The optimal sintering condition is 400 ℃ for 3 h in air with a heating rate of 6 ℃·min^-1. Under the optimal sintering condition, the alumina extraction efficiency from as-sintered coal fly ash can reach 85% or more.

Key words: Coal fly ash, Ammonium sulfate, Sintering temperature, Phase, Alumina extraction efficiency

摘要： A new developed technology for extracting alumina from coal fly ash was studied in this paper. In this technology, coal fly ash is first sintered with ammonium sulfate, forming ammonium aluminum sulfate in the resultant product, where alumina can be easily leached without using any strong acid or alkali. The products obtained under different sintering conditions were characterized by X-ray diffractometry. Alumina extraction efficiency of these products was also investigated. The results show that the sintering temperature and time substantially influence the phase composition and alumina extraction efficiency of sintered products, while the heating rate has little influence. The optimal sintering condition is 400 ℃ for 3 h in air with a heating rate of 6 ℃·min^-1. Under the optimal sintering condition, the alumina extraction efficiency from as-sintered coal fly ash can reach 85% or more.

关键词: Coal fly ash, Ammonium sulfate, Sintering temperature, Phase, Alumina extraction efficiency

Yusheng Wu, Ping Xu, Jiao Chen, Laishi Li, Mingchun Li . Effect of Temperature on Phase and Alumina Extraction Efficiency of the Product from Sintering Coal Fly Ash with Ammonium Sulfate[J]. , 2014, 22(11/12): 1363-1367.

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Effect of Temperature on Phase and Alumina Extraction Efficiency of the Product from Sintering Coal Fly Ash with Ammonium Sulfate

Effect of Temperature on Phase and Alumina Extraction Efficiency of the Product from Sintering Coal Fly Ash with Ammonium Sulfate

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