Citation: ZHU Ya-ming, TANG Shuai, ZHAO Xue-fei, ZHAO Chun-lei, YUAN Ji, HU Chao-shuai, YAN Li-dong. Micro-structure and micro-strength of coke from co-carbonization of lean coal and thermal extract from low rank coal[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(9): 1036-1043. shu

Micro-structure and micro-strength of coke from co-carbonization of lean coal and thermal extract from low rank coal

ZHU Ya-ming ^1,2 ,
TANG Shuai ³ ,
ZHAO Xue-fei ^1,2,, ,
ZHAO Chun-lei ^1,2 ,
YUAN Ji ^1,2 ,
HU Chao-shuai ^1,2 ,
YAN Li-dong ¹

1.
Engineering Research Center of Advanced Coal Coking and Efficient Use of Coal Resources, University of Science and Technology Liaoning, Institute of Chemical Engineering, Anshan 114051, China
2.
Key Laboratory of Chemical Metallurgy Liaoning Province, University of Science and Technology Liaoning, Anshan 114051, China
3.
Sinosteel Anshan Research Institute of Thermo-Energy Co., Ltd, Anshan 114044, China

Corresponding author: ZHAO Xue-fei, zhao_xuefei@sohu.com
Received Date: 22 May 2018
Revised Date: 20 July 2018

Fund Project: the National Nature Science Foundation of China U1361212the Youth Fund of University of Science and Technology Liaoning 2017QN06the Youth Fund of the Education Department of Liaoning Province 2017LNQN04The project was supported by the National Nature Science Foundation of China (U1361212), the Youth Fund of the Education Department of Liaoning Province (2017LNQN04) and the Youth Fund of University of Science and Technology Liaoning (2017QN06)

Figures(4)

Crucible cokes were obtained by co-carbonization of Zhongwei lean coal as main coking coal and thermal extract from Datong long-flame coal as additive. The degree of regularization on anisotropic structure (DRAS) of coke was obtained by quantitative calculation of optical tissue from polarized microscopy. The crystallite size (L_c), aromatic condensation (L_a) and degree of graphitization (g) have been quantitative calculated by combination of XRD and curve-fitted method. Furthermore, Raman spectrum and curve-fitted method have been used to obtain content of ideal graphite microcrystalline of coke. The quantitative analysis of optical micro-component on obtained cokes shows that addition of thermal extract from Datong long-flame coal has a significant influence on optical micro-component of coke. There is good consistency on DRAS and microcrystalline parameters, which is calculated by the method of polarized microscopy and XRD and Raman spectrum, respectively. Moreover, the micro-strength index of coke is highly correlated with its microstructure.
- coke,
- micro-structure,
- degree of regularization on anisotropic structure (DRAS),
- microcrystalline parameter
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