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

LI Huai-zhu; KONG Ling-xue; BAI Jin; BAI Zong-qing; LI Wen

Volume 45 Issue 12

Dec. 2017

Turn off MathJax

Article Contents

Article Navigation > Journal of Fuel Chemistry and Technology > 2017 > 45(12): 1409-1416

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.

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.

Citation:

PDF( 982 KB)

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

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

Funds:

the Natural Science Foundation of China 21406254

the Natural Science Foundation of China 21476247

Joint Foundation of Natural Science Foundation of China and Shanxi Province U1510201

Shanxi Province Science Foundation for Youths 2015021055

Fundamental Research Funds for the Central Universities 222201717004

More Information

Corresponding author: BAI Jin, Tel: 0351-4040289, Fax: 0351-4050320, E-mail: stone@sxicc.ac.cn
Received Date: 2017-07-21
Rev Recd Date: 2017-10-20

Available Online: 2021-01-23

Publish Date: 2017-12-10

Abstract

Abstract

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

FullText(HTML)

References(14)

References

[1]	于遵宏, 王辅臣.煤炭气化技术[M].北京:化学工业出版社, 2013. YU Zun-hong, WANG Fu-chen. Coal Gasification Technol[M]. Beijing:Chemical Industry Press, 2013.
[2]	张绍韡.论山西省无烟煤及动力煤资源量的现状、分布及预测[J].华北国土资源, 2014, (2):108-111. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hbgt201402091&dbname=CJFD&dbcode=CJFQ ZHANG Shao-wei. The quantity, distribution and forecast of the anthracite coal and steam coal from Shanxi[J]. Huabei Land Resources, 2014, (2):108-111. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hbgt201402091&dbname=CJFD&dbcode=CJFQ
[3]	GB/T 29722-2013, 气流床气化用原料煤技术条件[S]. GB/T 29722-2013, Specifications of coal for entrained-flow gasifier[S].
[4]	李文, 白进.煤的灰化学[M].北京:科学出版社, 2013. LI Wen, BAI Jin. Coal Ash Chemistry[M]. Beijing:Science Press, 2013.
[5]	陈清如, 骆振福.干法选煤评述[J].选煤技术, 2003, (6):34-40. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=xmjs200306005&dbname=CJFD&dbcode=CJFQ CHEN Qing-ru, LUO Zhen-fu. Review on dry coal separation[J]. Coal Preparation Technol, 2003, (6):34-40. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=xmjs200306005&dbname=CJFD&dbcode=CJFQ
[6]	徐荣声. 煤中矿物质在热转化过程中的演化行为[D]. 北京: 中国矿业大学, 2016. 煤中矿物质在热转化过程中的演化行为 XU Rong-sheng. Behaviors of minerals in coal during the processes of thermal transformation[D]. Beijing:China University of Mining and Technology, 2016. 煤中矿物质在热转化过程中的演化行为
[7]	张景, 陈洪博, 张宇宏.添加助熔剂降低晋城煤高灰熔融性温度研究[J].煤质技术, 2015, (1):49-52. doi: 10.3969/j.issn.1007-7677.2015.01.015 ZHANG Jing, CHEN Hong-bo, ZHANG Yu-hong. Research on reducing ash fusibility temperature of Jincheng coal by utilizing limestone[J]. Coal Quality Technol, 2015, (1):49-52. doi: 10.3969/j.issn.1007-7677.2015.01.015
[8]	刘锦启, 陈前林, 王景行.添加剂对无烟煤灰熔点和成浆性能的影响[J].煤炭学报, 2013, 38(2):483-488. http://www.oalib.com/paper/4232259 LIU Jin-qi, CHEN Qian-lin, WANG Jing-xing. Effect of additive on ash melting point and pulping performance of anthracite[J]. J China Coal Society, 2013, 38(2):483-488. http://www.oalib.com/paper/4232259
[9]	SONG W J, TANG L H, ZHU X D, WUA Y Q, RONG Y Q, ZHU Z B, KOYAMA S. Fusibility and flow properties of coal ash and slag[J]. Fuel, 2009, (88):297-304. http://www.sciencedirect.com/science/article/pii/S0016236108003499
[10]	KONG L X, BAI J, LI W, WEN X D, LI X M, BAI Z Q, GUO Z X, LI H Z. The internal and external factor on coal ash slag viscosity at high temperatures, Part 3:Effect of CaO on the pattern of viscosity-temperature curves of slag[J]. Fuel, 2016, (179):10-16. http://www.sciencedirect.com/science/article/pii/S0016236116301004
[11]	JAK E. Prediction of coal ash fusion temperature with the FACT thermodynam ic computer package[J]. Fuel, 2002, (81):1655-1668. https://www.sciencedirect.com/science/article/pii/S0016236112004668
[12]	CHAKRAVARTY S, MOHANTY A, BANERJEE A, TRIPATHY R, MANDAL G K, BASARIYA M R, SHARMA M. Composition, mineral matter characteristics and ash fusion behavior of some Indian coals[J]. Fuel, 2015, (15):96-101. http://www.sciencedirect.com/science/article/pii/S0016236115001568
[13]	白进, 孔令学, 李怀柱, 郭振兴, 白宗庆, 尉迟唯, 李文.山西典型无烟煤灰流动性的调控[J].燃料化学学报, 2013, 41(7):805-813. http://manu60.magtech.com.cn/rlhxxb/CN/abstract/abstract18214.shtml BAI Jin, KONG Ling-xue, LI Huai-zhu, GUO Zhen-xing, BAI Zong-qing, YUCHI Wei, LI Wen. Adjustment in high temperature flow property of ash from Shanxi typical anthracite[J]. J Fuel Chem Technol, 2013, 41(7):805-813. http://manu60.magtech.com.cn/rlhxxb/CN/abstract/abstract18214.shtml
[14]	孔令学, 白进, 李文, 白宗庆, 郭振兴.氧化钙含量对灰渣流体性质影响的研究[J].燃料化学学报, 2011, 39(6):407-412. http://manu60.magtech.com.cn/rlhxxb/CN/abstract/abstract17750.shtml KONG Ling-xue, BAI Jin, LI Wen, BAI Zong-qing, GUO Zhen-xing. Effect of lime addition on slag fluidity of coal ash[J]. J Fuel Chem Technol, 2011, 39(6):407-412. http://manu60.magtech.com.cn/rlhxxb/CN/abstract/abstract17750.shtml