Effect of Temperature on Phase Composition of Sintering Coal Fly Ash with Ammonium Sulfate

Abstract:

The new processing technology of extraction alumina by sintering coal fly ash with ammonium sulfate was studied. The phase evolutions of the sintered coal fly ash in different temperature schemes were characterized by X-ray diffractometry. The alumina extraction efficiency of sintered coal fly ash obtained from different sintering temperature schemes had also been investigated. The results show that the sintering temperature and holding time markedly influence the phase composition and alumina extraction efficiency of sintered coal fly ash, while the temperature rising time has little influence on it. The optimal temperature scheme for sintering coal fly ash with ammonium sulfate has been eventually confirmed that increasing temperature from ambient temperature to 400 °C for 1 h and heating for 3 h in air and the alumina extraction efficiency from as-sintered coal fly ash can reach 85.6%.

• Periodical: Applied Mechanics and Materials (Volumes 448-453)
• Pages: 3088-3092
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.448-453.3088
• Online since: October 2013
• Authors: Yu Sheng Wu*, Jiao Chen, Lai Shi Li, Ming Chun Li, Ping Xu, Zhi Qiang Ning
• Keywords: Alumina Extraction Efficiency, Ammonium Sulfate, Coal Fly Ash, Phase, Sintering Temperature

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