Effect of High-Efficiency Flux on the Melting Characteristics of Coal Ash

Abstract:

High-efficiency flux was developed to lower the ash fusion temperature of coal LQ and reduce the addition content in coal gasification process. The effect of high-efficiency flux on the coal ash melting temperature and mineral transformation were studied by ash fusion temperature detector and XRD (X-ray diffractometer) respectively in reducing atmosphere. Compared with limestone flux, the high-efficiency flux can decrease the coal ash melting temperature effectively with half addition content. The ash flow temperature (FT) of coal LQ can be lowered to less than 1350°C with the addition of 3% high-efficiency flux ,while limestone flux need to add more than 8% to reach to this temperature. With the high-efficiency flux added, cordierite, anorthite and Mg-Fe-Al oxide were formed at high temperature, which is the main reason to sharply decrease the ash fusion temperature.

• Periodical: Applied Mechanics and Materials (Volumes 295-298)
• Pages: 3094-3097
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.295-298.3094
• Online since: February 2013
• Authors: Han Xu Li, Zi Li Zhang, Yong Xin Tang
• Keywords: Ash Mineral Composition, Flow Temperature, High-Efficiency Flux

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