ABSTRACT

In order to investigate the influence of water content on spontaneous combustion characteristics of coal containing pyrite, the Thermogravimetric analysis (TG), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) was carried out. The XRD results reveal high pyrite in the Yangquan anthracite. The water loss end temperature and initial reaction temperature increased, with the interval between them decreasing, and the maximum weight loss rate temperature declined as the water content increased. The activation energy reduced, and the mechanism function of coal sample changed from chemical reaction to chemical reaction of the third order after adding water. The heat release value increased by 14.4%in sample YQ₄ compared with sample YQ₁. Combustion produced mainly SO₂, CO₂ and H₂O, with SO₂ as the primary gas. Gas generation curves were partially interlaced.

摘要

为了研究含水量对含黄铁矿煤自燃特性的影响，进行了热重分析（TG）、傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）。XRD结果显示阳泉无烟煤中黄铁矿含量较高。失水结束温度和反应起始温度升高，两者之间的间隔减小，最大失重率温度随着含水量的增加而降低。加水后，活化能降低，煤样的机理作用由化学反应转变为三级化学反应。_{与样品YQ 1}相比，样品YQ ₄的放热值提高了14.4% 。燃烧产生的主要是 SO₂、CO ₂和H ₂ O，以SO ₂为主要气体。产气曲线部分交错。