Spectroscopy and Spectral Analysis, Volume. 42, Issue 3, 847(2022)

Study on Directional Near-Infrared Reflectance Spectra of Typical Types of Coal

En YANG1、1; and Shi-bo WANG2、2; *;
Author Affiliations
  • 11. School of Intelligent Manufacturing, Jiangsu Vocational Institute of Architectural Technology, Xuzhou 221116, China
  • 22. School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, China
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    Figures & Tables(14)
    Directional reflection platform and spectra acquisition diagram for coal(a): Spherical coordinate device for directional reflection measurment; (b): Directional reflectance spectra acquisition diagram for coal
    Near-infrared spectral reflectance curves of No.1 anthracite under different azimuth angles (φ)(a): φ=0°; (b): φ=45°; (c): φ=90°; (d): φ=135°; (e): φ=180°
    Near-infrared spectral reflectance curves of meager coal under different azimuth angles (φ)(a): φ=0°; (b): φ=45°; (c): φ=90°; (d): φ=135°; (e): φ=180°
    Near-infrared spectral reflectance curves of gas coal under different azimuth angles (φ)(a): φ=0°; (b): φ=45°; (c): φ=90°; (d): φ=135°; (e): φ=180°
    Near-infrared spectral reflectance curves of No.2 lignite under different azimuth angles (φ)(a): φ=0°; (b): φ=45°; (c): φ=90°; (d): φ=135°; (e): φ=180°
    Polar nephograms of reflectance at characteristic wavelengths (λ) of No.1 anthracite(a): λ=1 400 nm; (b): λ=1 700 nm; (c): λ=1 900 nm; (d): λ=2 200 nm; (e): λ=2 300 nm
    Polar nephograms of reflectance at characteristic wavelengths (λ) of meager coal(a): λ=1 400 nm; (b): λ=1 700 nm; (c): λ=1 900 nm; (d): λ=2 200 nm; (e): λ=2 300 nm
    Polar nephograms of reflectance at characteristic wavelengths (λ) of gas coal(a): λ=1 400 nm; (b): λ=1 700 nm; (c): λ=1 900 nm; (d): λ=2 200 nm; (e): λ=2 300 nm
    Polar nephograms of reflectance at characteristic wavelengths (λ) of No.2 lignite(a): λ=1 400 nm; (b): λ=1 700 nm; (c): λ=1 900 nm; (d): λ=2 200 nm; (e): λ=2 300 nm
    Regression curves of reflectance-reflection angle at characteristic wavelengths of No.1 anthracite(a): Forward direction; (b): Backward direction
    Regression curves of reflectance-reflection angle at characteristic wavelengths of meager coal(a): Forward direction; (b): Backward direction
    Regression curves of reflectance-reflection angle at characteristic wavelengths of gas coal(a): Forward direction; (b): Backward direction
    Regression curves of reflectance-reflection angle at characteristic wavelengths of No.2 lignite(a): Forward direction; (b): Backward direction
    • Table 1. Main compositions of the four typical coal samples

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      Table 1. Main compositions of the four typical coal samples

      煤样类型工业分析/%煤灰XRF分析/%
      固定碳挥发分灰分水分SiO2Al2O3Fe2O3CaOMgOTiO2Na2OK2OP2O5
      无烟煤一号91.282.624.671.4345.8329.1917.833.290.060.101.002.500.20
      贫煤(烟煤)73.1616.598.611.6463.7814.6213.933.900.250.122.101.260.04
      气煤(烟煤)58.6729.989.381.9757.1028.009.182.041.580.020.651.320.11
      褐煤二号34.6940.4521.053.8172.1212.136.236.101.510.050.441.330.09
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    En YANG, Shi-bo WANG. Study on Directional Near-Infrared Reflectance Spectra of Typical Types of Coal[J]. Spectroscopy and Spectral Analysis, 2022, 42(3): 847

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    Paper Information

    Category: Orginal Article

    Received: Jan. 19, 2021

    Accepted: Mar. 1, 2021

    Published Online: Apr. 19, 2022

    The Author Email:

    DOI:10.3964/j.issn.1000-0593(2022)03-0847-12

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