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对煤自燃过程中煤物理吸附氧进行了理论分析,利用色谱吸氧法测试了不同煤种的煤样在不同吸附时间、不同环境温度和不同粒度的物理吸附氧量,分析了影响煤物理吸附氧的影响因素,并计算出煤因物理吸附氧而放出热量使煤体温度的上升值．结果表明,煤物理吸附氧量随环境温度上升而下降、随粒度变大先增加而后下降、而与煤的变质程度没有直接关系,煤物理吸附氧气的速率非常快,物理吸附是煤自燃过程的第一步,其关键作用在于为煤的氧化输送氧,最后从实验和理论上对以煤吸附氧量大小为指标的煤自燃倾向性鉴定方法进行了分析和评价。图5,表2,参8。
Physical adsorption of oxygen in coal during spontaneous combustion was theoretically analyzed. The physical adsorption of oxygen on different coal samples at different adsorption times, different ambient temperatures and different particle sizes was tested by chromatographic oxygen absorption method. The influence of physical adsorption oxygen Oxygen and influence factors, and calculate the physical release of coal due to the release of heat so that coal temperature rise. The results showed that physical adsorption of oxygen decreased with the increase of ambient temperature, then increased and then decreased with the increase of particle size, but not directly related to the degree of coal metamorphism. The rate of physical adsorption of oxygen by coal was very fast, and the physical adsorption was spontaneous combustion of coal The first step, the key role is to transport oxygen for the oxidation of coal, and finally from the experimental and theoretical analysis of coal spontaneous combustion propensity to identify the size of the amount of oxygen adsorbed by the coal analysis and evaluation. Figure 5, Table 2, reference 8.