Citation: CHENG Xiang-long, WANG Yong-gang, ZHANG Rong, BI Ji-cheng. Effect of low temperature eutectics on coal ash fusion temperatures[J]. Journal of Fuel Chemistry and Technology, ;2016, 44(9): 1043-1050. shu

Effect of low temperature eutectics on coal ash fusion temperatures

1.
School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
2.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

Corresponding author: WANG Yong-gang, wyg1960@126.com
Received Date: 24 March 2016
Revised Date: 3 June 2016

Fund Project: the 12th Five-Year Plan of National Science and Technology Support 2012BAA04B02

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Coal ash fusion temperature is important for large-scale gasifier/boiler designers and operators. There has been a big error for fusion temperature calculated by chemical composition of coal ash because the ash is composed of minerals actually, which has a strong impact on fusion temperature. A new calculation method, based on chemical composition and low temperature eutectics of minerals being considered, is proposed, according to 59 typical coal samples from the central and western regions in China. The most predictive values are not far from preciseness with a mean error lower than 5%, when the calculation is employed to 108 coal samples. Meanwhile, a roughly sufficient judgment to identify the ash fusion temperature greater than 1 500℃ is suggested by formula, which is 0.9≤SiO₂/A1₂O₃≤1.8 and SiO₂+A1₂O₃≥78% with accuracy of 92.2% among 167 coal samples.
- low temperature eutectic,
- ash fusion temperature,
- chemical composition,
- mineral composition
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