A Study on the Mechanism of Aluminia Extraction from Coal Fly Ash

Miao Wang; Yan Xia Guo; Fang Qin Cheng; Yao Yao Li

doi:10.4028/www.scientific.net/AMR.518-523.3109

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 518-523A Study on the Mechanism of Aluminia Extraction...

A Study on the Mechanism of Aluminia Extraction from Coal Fly Ash

Abstract:

Coal fly ash contains large amounts of aluminum, iron, silicon and other useful elements. Its utilization effectively is of significance to harmonious development of economy, society and environment. However, coal fly ash is mainly composed of mullite and other inert glassy matters with high degree of polymerization and its reactivity is poor. So the fly ash needs to be activated before utilization. This article studied the effect of activation by calcination added with NaOH additives on aluminium extraction. The results showed that the addition of NaOH could improve the aluminium extraction rate evidently. Detailed analysis and characterization was carried out by using X-ray diffraction (XRD). The results indicated that NaOH could improve the depolymerization of vitreous.

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Periodical:

Advanced Materials Research (Volumes 518-523)

Pages:

3109-3114

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.518-523.3109

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Online since:

May 2012

Authors:

Miao Wang, Yan Xia Guo, Fang Qin Cheng, Yao Yao Li

Keywords:

Activation, Alumina Extraction, Coal Fly Ash

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