Journal
FUEL
Volume 158, Issue -, Pages 884-890Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2015.06.010
Keywords
Low-rank coal; Biomass; Ash fusibility characteristics; Mineral interaction
Categories
Funding
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA07050103]
- Foundation of State Key Laboratory of Coal Conversion [J12-13-102]
- Natural Science Foundation of Shandong Province, China [ZR2014BM014]
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The fusion characteristics of three low-rank coals and cornstalk (CS) mixtures were investigated by ash fusion temperature (AFT) analysis, X-ray fluorescence spectrometry, scanning electron microscopy, and X-ray diffractometry. The increasing trend of CS ash fusion temperature (AFT) is not the same with the additions of different coals at the same mass ratio, due to the difference of the ash content and component of coal samples. Variations in AFTs depended on the mineral composition, which derived from mineral interaction. As the coal mass ratio increased at high temperature, Ca2+ replaced K+ in semi-molten alumino-silicate in CS ashes and led to formation of higher-melting-point anorthite, which also increased the AFT of the ash mixture. The AFT fluctuation of CS/Husheng lignite (HS) mixture during addition of HS resulted from formation of higher-MP mullite. (C) 2015 Elsevier Ltd. All rights reserved.
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