Mineralogical properties of lowering coal ash melting temperature using blending coal and fluxing agent

XU Rong-sheng; WANG Yong-gang; LIN Xiong-chao; YANG Sa-sha; AI Sha-jiang; YANG Yuan-ping

Volume 43 Issue 11

Nov. 2015

Turn off MathJax

Article Contents

Article Navigation > Journal of Fuel Chemistry and Technology > 2015 > 43(11): 1303-1310

XU Rong-sheng, WANG Yong-gang, LIN Xiong-chao, YANG Sa-sha, AI Sha-jiang, YANG Yuan-ping. Mineralogical properties of lowering coal ash melting temperature using blending coal and fluxing agent[J]. Journal of Fuel Chemistry and Technology, 2015, 43(11): 1303-1310.

Citation:

XU Rong-sheng, WANG Yong-gang, LIN Xiong-chao, YANG Sa-sha, AI Sha-jiang, YANG Yuan-ping. Mineralogical properties of lowering coal ash melting temperature using blending coal and fluxing agent[J]. Journal of Fuel Chemistry and Technology, 2015, 43(11): 1303-1310.

Citation:

XU Rong-sheng, WANG Yong-gang, LIN Xiong-chao, YANG Sa-sha, AI Sha-jiang, YANG Yuan-ping. Mineralogical properties of lowering coal ash melting temperature using blending coal and fluxing agent[J]. Journal of Fuel Chemistry and Technology, 2015, 43(11): 1303-1310.

PDF( 1516 KB)

Mineralogical properties of lowering coal ash melting temperature using blending coal and fluxing agent

School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China

Funds: The project was supported by the National Natural Science Foundation of China (21406261) and the Key Projects in the National Science & Technology Pillar Program during the Twelfth Five-year Plan Period (2012BAA04B02).

Received Date: 2015-04-30
Rev Recd Date: 2015-06-30
Publish Date: 2015-11-30

Abstract

Abstract

In order to understand the slagging properties of blended coal, different coal blending and flux agent were added to Jincheng anthracites. The X-ray diffraction (XRD), thermodynamic software FactSage and ash fusion temperature (AFT) test were employed to analyze the ash fusion characteristics of blended coals and the mineralogical properties of the blended coal ashes. The results show that the content of ash in coal has an important role in the AFT change of blended coals. The lower the ash contained in raw coal is, the easier the AFT of blended coal lowers. The addition ratio of coal blending is 20% and 30% when the AFT decreases significantly for coal C with low ash content and G with high ash content, respectively. There is more significant fluxing effect of K on C than that on G. It is found that the feldspar mineral is formed at the deformation temperature. The decreasing in contents of mullite as well as the appreciably increasing for feldspar is the main reason for the decreasing of AFT. The thermodynamic analyses indicate that the producing of liquid matter is related to the rapidly decreasing in the contents of anorthite and quartz, as well as slowly decreasing for mullite at high temperature. The anorthite takes part in the formation of liquid matter. The fluxing effect of anorthite depends on the contents of matter which can react with anorthite to produce a melt with lower fusion point.
- blended coal,
- deformation temperature,
- mineralogical property,
- chemical composition

FullText(HTML)

References(16)

References

张龙, 黄振宇, 沈铭科, 王智化, 周俊虎. 不同的灰熔点调控方式对煤灰熔融特性的影响[J].燃料化学学报, 2015, 43(2): 145-152. (ZHANG Long, HUANG Zhen-yu, SHEN Ming-ke, WANG Zhi-hua, ZHOU Jun-hu. Effect of different regulative methods on coal ash fusion characteristics[J]. J Fuel Chem Technol, 2015, 43(2): 145-152.)

BENSON S A, SONDREAL E A, HURLEY J P. Status of coal ash behavior research[J]. Fuel Process Technol, 1995, 44: 1-12.

COLLOT A G. Matching gasification technologies to coal properties[J]. Int J Coal Geol, 2001, 65:191-212.

VAN DYK J C, KEYSER M J, VAN ZYL J W. Suitability of feedstocks for the sasol-lurgi fixed bed dry bottom gasification process[C]. Gasification technologies 2001, san Francisco, California, 2001: 1-11.

陈鹏. 中国煤炭性质、分类和利用[J]. 北京: 化学工业出版社, 2001. (CHEN Peng. The characteristics, classification and utilizing of Chinese coal[M]. Beijing: Chemical Industry Press, 2001.)

VAN DYK J C, MELZER S, SOBIECKI A. Mineral matter transformation during Sasol-Lurgi fixed bed dry bottom gasification- utilization of HT- XRD and FactSage modeling[J]. Miner Eng, 2006, 19: 1126-1135.

MATJIE R H, VAN ALPHEN C, PISTORIUS P C. Mineralogical characterization of secunda gasifier feedstock and coarse ash[J]. Miner Eng, 2006, 19: 256-261.

MANGENA S J, BUNT J R, WAANDERS F B. Physical property behavior of North Dakota lignite in an oxygen/steam blown moving bed gasifier[J]. Fuel Process Technol, 2013, 106: 326-331.

芦涛, 张雷, 张晔, 丰芸, 李寒旭. 煤中矿物质组成对煤灰熔融温度的影响[J]. 燃料化学学报, 2010, 38(1): 23-28. (LU Tao, ZHANG Lei, ZHANG Ye, FENG Yun, LI Han-xu. Effect of mineral composition on coal ash fusion temperature[J]. J Fuel Chem Technol, 2010, 38(1): 23-28.)

VASSILEV S V, KITANO K, TAKEDA S, TSURUE T. Influence of mineral and chemical composition of coal ashes on the fusibility[J]. Fuel Process Technol, 1995, 45: 27-51.

陈凡敏, 王嘉瑞, 赵冰, 李小江, 覃涛. 煤中矿物质对灰熔融和燃烧特性的影响[J]. 燃料化学学报2015, 43(1): 27-33. (CHEN Fan-min, WANG Jia-rui, ZHAO Bing, LI Xiao-jiang, QIN Tao. Effect of mineral form in coal on combustion characteristics and fusibility of coal ash[J]. J Fuel Chem Technol, 2015, 43(1): 27-33.)

SU S, POHL J H, HOLCOMBE D, HART J A. Slagging propensities of blended coals[J]. Fuel, 2001, 80: 1351-1360.

ZHAO Y C, ZHANG J Y, SHAO X Y, ZHENG C G. A new method for ash melting thermo-analysis based on mineral quantity[J]. Chin Sci Bull, 2011, 56(10): 1043-1047.

QIU J R, LI F, ZHENG C G. Mineral transformation during combustion of coal blends[J]. Int J Energy Res, 1999, 23: 453-463.

RUSHDI A, SHARMA A, GUPTA R. An experimental study of the effect of coal blending on deposition[J]. Fuel, 2004, 83: 495-506.

王大川, 梁钦锋, 龚欣, 刘海峰, 刘霞. 添加助熔剂后朱集西煤灰熔融特性规律研究[J]. 燃料化学学报, 2015, 43(2): 153-159. (WANG Da-chuan, LIANG Qin-feng, GONG Xin, LIU Hai-feng, LIU Xia. Fusion properties of zhujixi washed coal ash adding fluxes[J]. J Fuel Chem Technol, 2015, 43(2): 153-159.)

Relative Articles

Supplements(0)

Cited By

Proportional views