Citation: LI Huai-zhu, KONG Ling-xue, BAI Jin, BAI Zong-qing, LI Wen. Study on effect of Shanxi high ash content and ash fusion temperature coals on fluxing mechanism of limestone[J]. Journal of Fuel Chemistry and Technology, ;2017, 45(12): 1409-1416. shu

Study on effect of Shanxi high ash content and ash fusion temperature coals on fluxing mechanism of limestone

LI Huai-zhu ¹ ,
KONG Ling-xue ^1,2 ,
BAI Jin ^1,, ,
BAI Zong-qing ¹ ,
LI Wen ¹

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
Key Laboratory of Coal Gasification and Energy Chemical of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China

Corresponding author: BAI Jin, stone@sxicc.ac.cn
Received Date: 21 July 2017
Revised Date: 20 October 2017

Fund Project: Joint Foundation of Natural Science Foundation of China and Shanxi Province U1510201The project was supported by the Natural Science Foundation of China (21406254, 21476247), Joint Foundation of Natural Science Foundation of China and Shanxi Province (U1510201), Shanxi Province Science Foundation for Youths (2015021055) and Fundamental Research Funds for the Central Universities (222201717004)the Natural Science Foundation of China 21406254the Natural Science Foundation of China 21476247Fundamental Research Funds for the Central Universities 222201717004Shanxi Province Science Foundation for Youths 2015021055

Figures(10)

The floated coal samples with different ash contents were obtained by coal washing, and the effect of ash content on addition of fluxing CaCO₃ was investigated. The results show that silica content and silicon to aluminum ratio (Si/Al) of ash decrease with decreasing ash content. The AFTs of coal ashes change with increasing CaCO₃ addition. The additive CaCO₃ content is closely related to the mineral formed at high temperatures and their contents. Furthermore, for the FH and SH coals after floatation, the viscosity of slag with CaCO₃ addition exhibits a behavior of glass slag, and also has a large slagging temperature range. The properties of the floated coal ash slags with CaCO₃ addition well meet the requirement of slag tapping in entrained flow gasifier. It is an effective way for Shanxi high ash content and ash fusion temperature coals to combine coal washing and CaCO₃ adding to adjust the ash flow properties in entrained flow gasification.
- Shanxi high ash content and ash fusion temperature coals,
- coal washing,
- ash content,
- CaCO₃,
- ash fusion temperatures,
- ash viscosity-temperature characteristics
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