An improved method for characterizing coal metamorphism by XRD

WANG Chao; ZHAO Younan; WANG Zhenwei; LU Zhaolin

doi:10.3969/j.issn.1001-1986.2019.06.007

Volume 47 Issue 6

Dec. 2019

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COAL GEOLOGY & EXPLORATION > 2019 > 47(6): 39-44. > DOI: 10.3969/j.issn.1001-1986.2019.06.007

WANG Chao, ZHAO Younan, WANG Zhenwei, LU Zhaolin. An improved method for characterizing coal metamorphism by XRD[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(6): 39-44. DOI: 10.3969/j.issn.1001-1986.2019.06.007

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An improved method for characterizing coal metamorphism by XRD

1. Center for Modern Analysis and Computing, China University of Mining and Technology, Xuzhou 221116, China;
2. Institute of Chemical Engineering, China University of Mining and Technology, Xuzhou 221116, China

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National Natural Science Foundation of China for Youth Science Fund Project(51604271)

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Received Date: March 28, 2019
Published Date: December 24, 2019

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Abstract

Abstract

At present, the X-ray measurement method of coal metamorphism has the problem that the γ band is not well divided, the δ peak information is not used, and the background of the bottom is unreasonable. The X-ray diffraction pattern of coal with different metamorphosed degrees is compared and studied. It is proposed to correct the metamorphic coefficient formula by using the information of the slope of the 002 peak, the extended half-height width and the δ peak without deducting the so-called background information. The calculation of the XRD patterns of coal samples with different degrees of metamorphism is verified. The method can better express the degree of metamorphism of coal, avoid the problem that the γ band is not well divided, the δ peak effective information is not used, and the background is unreasonable. It is a simple, feasible and accurate measure of coal metamorphism. The method of degree is recommended to be promoted in the industry.
- coal,
- degree of deterioration,
- X-ray diffraction,
- metamorphic coefficient

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