Citation: REN Jun-bin, LI Jun-guo, ZHANG Yong-qi, WANG Zhi-qing, LI Feng-hai, FANG Yi-tian. Influence factors for fusion characteristics of mixed ash between biomass and bituminous coal[J]. Journal of Fuel Chemistry and Technology, ;2017, 45(11): 1317-1322. shu

Influence factors for fusion characteristics of mixed ash between biomass and bituminous coal

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Department of Chemistry and Chemical Engineering, Heze University, Heze 274000, China

Corresponding author: ZHANG Yong-qi, zhangyq@sxicc.ac.cn
Received Date: 15 June 2017
Revised Date: 14 August 2017

Fund Project: the National Natural Science Foundation of China 21676289The project was supported by the National Natural Science Foundation of China (21506242, 21676289)the National Natural Science Foundation of China 21506242

Figures(5)

Effects of atmosphere, mixing ratio and residue carbon on ash fusion characteristics of biomass and bituminous coal were investigated. The pine sawdust ash was mixed with Wuhai bituminous coal ash at different mass ratios. The ash fusion temperatures (AFTS) of the mixed ash in different atmospheres were determined by ash-melting point measuring device. X-ray diffraction ray was used to investigate the reason for AFTs variation from the perspective of minerals evolution. The result shows that AFTs of mixed ash in weak reducing atmosphere is lower than that in oxidizing one due to formation of fayalite and hercynite. In addition, the difference in AFTs under reducing and oxidizing atmosphere is related to the content of Fe in the mixed ash. The increment of pine sawdust ash favors generation of gehlenite, akermanite and leucite ect., which can be classified as low temperature eutectics and help to reduce the AFTs of mixed ash. Moreover, the AFTs of the mixed ash increase initially and decrease afterwards and then increase again with the increment of residue carbon content in coal ash, due to formation of Fe-C eutectic (Fe_xC_y), local reducing atmosphere and skeleton action of residue carbon.
- biomass,
- mixed ash,
- ash fusibility characteristics,
- residue carbon,
- mineral evolution
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沈阳化工大学材料科学与工程学院沈阳 110142