The combustion properties and grindability of Shenmu low-rank coal (SM) and its four different semi-cokes were studied by the self-designed equipment and Hardgrove method. The four semi-cokes were obtained under the pyrolysis temperature of 400, 500, 600 and 700 °C, named as SM-400, SM-500, SM-600 and SM-700, respectively. The analyses of nitrogen adsorption, Fourier-transform infrared spectroscopy (FTIR) spectra and Raman spectra were carried out to explain the change in combustion ratio and grindability. The result showed that the specific surface area of samples had an essential effect on the combustion ratio of SM-400 and SM-500. Meanwhile, the grindability depended on the strength of coal matrix, and the augment of pore amounts would increase the grindability. The functional groups and graphitization degree of the same sample were identical with the combustion ratio. With the pyrolysis upgrading temperature increasing, the combustion ratio of sample decreased, corresponding to the decrease in the benzene ring and the increase in graphitization degree. In addition, the thermogravimetric analysis was carried out, and the result was compared against what was shown in the data of combustion ratio. For pulverized coal injection, the combustion ratio was more intuitive and more accurate than combustibility.

利用自行设计的设备和Hardgrove方法研究了神木低阶煤及其四种不同半焦的燃烧特性和可磨性。在400、500、600和700℃的热解温度下获得了四个半焦，分别命名为SM-400，SM-500，SM-600和SM-700。进行了氮吸附，傅立叶变换红外光谱（FTIR）光谱和拉曼光谱的分析，以解释燃烧比和可磨性的变化。结果表明，样品的比表面积对SM-400和SM-500的燃烧比具有重要影响。同时，可磨性取决于煤基质的强度，孔数量的增加会提高可磨性。同一样品的官能团和石墨化程度与燃烧比相同。随着热解温度的升高，样品的燃烧比降低，这与苯环的减少和石墨化度的增加相对应。另外，进行热重分析，并将结果与​​燃烧比数据中显示的结果进行比较。对于喷粉煤，燃烧比比可燃性更直观，更准确。并将结果与​​燃烧比数据中显示的进行比较。对于喷粉煤，燃烧比比可燃性更直观，更准确。并将结果与​​燃烧比数据中显示的进行比较。对于喷粉煤，燃烧比比可燃性更直观，更准确。