Citation: QIN Yu-hong, HAN Qing-qing, REN Wei-ping, ZHAO Zi-bing, FENG Jie, LI Wen-ying, GAO Song-ping. Fluxing mechanism of rice straw for Jincheng anthracite under weak reducing atmosphere[J]. Journal of Fuel Chemistry and Technology, ;2016, 44(12): 1440-1446. shu

Fluxing mechanism of rice straw for Jincheng anthracite under weak reducing atmosphere

1.
College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
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State Key Laboratory Breeding Base of Coal Science and Technology Co-founded by Shanxi Province and the Ministry of Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China
3.
Department of Chemistry and Chemical Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China

Corresponding author: FENG Jie, fengjie@tyut.edu.cn
Received Date: 27 July 2016
Revised Date: 18 September 2016

Figures(5)

The fluxing mechanism of rice straw for Jincheng anthracite with high ash fusion temperatures was investigated under weak reducing atmosphere by CaO-Al₂O₃-SiO₂ ternary phase diagram, X-ray diffraction (XRD) and scanning electron microscopy coupled with energy dispersive X-ray spectrometry (SEM-EDX). The fusion temperatures of blended ash decrease, and the content of basic oxide CaO, Na₂O and K₂O increases with increment of rice straw addition. The slagging index R_b/a is between 0.20 and 0.69. The fluid temperature (FT) declines to 1 369℃ by adding 20% rice straw, which could satisfy requirement of liquid slag discharge for gasifier. The addition of rice straw reduces the initial temperature and increases the occurrences proportion and probability of liquid phase in the ash. The formation of crystal albite with low melting point and eutectics formed from anorthite, quartz and mullite lead the decrease of ash fusion temperatures.
- Jincheng anthracite,
- rice straw,
- CaO-Al₂O₃-SiO₂ternary phase diagram,
- mineral matter,
- fluxing mechanism
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1.
沈阳化工大学材料科学与工程学院沈阳 110142