摘要
煤自燃是煤在一定条件下低温氧化放热并聚集热量,使煤温度升高并达到着火点的自发燃烧过程,是煤矿安全生产和煤炭应用中的重大灾害之一。煤自燃倾向性反映了煤自身的物理化学性质与其自然发火特征之间的关联性,是煤自燃特性的重要指标。本文介绍了国内外常用的煤自燃倾向性测试方法及研究现状,总结了不同测试方法的特点和存在的问题,展望了煤自燃倾向性测试方法的发展趋势,指出了弥补单一测试方法在煤自燃倾向性测试中可能带来的偏差,可将多种测试方法的测试指标进行整合构成一个通用的指标,新指标应既能涵盖煤在低温阶段的氧化特性,又能体现煤的自燃过程。
Coal oxidation at low temperatures is the major heat source responsible for the self-heating and spontaneous combustion of coal. Spontaneous combustion of coal results in safety problems and energy losses. It is one of the most serious disasters in the coal mine production and coal application. The propensity of coal to spontaneous combustion demonstrates the inherent characters of the oxidation capacity at normal temperature. The existing test methods for the propensity of coal to spontaneous combustion has a vital significance for the prevention of the mine fire. Test methods and progress in the study of coal spontaneous combustion tendentiousness are reviewed. The advantages and existing problems of coal spontaneous combustion tendentiousness test methods are pointed out, and their future developments are prospected. The authors point out that, to compensate the deviation that may brought in by the coal spontaneous combustion tendentiousness test using just one method, the adjustment indexes of multiple test methods can be integrated to produce a general index, which should not only reflect the oxidation characteristics of the coal at low temperatures, but also represent the coal spontaneous combustion process.
出处
《热力发电》
CAS
北大核心
2017年第10期1-9,共9页
Thermal Power Generation
关键词
自燃倾向性
着火点
氧吸附法
交叉温度法
篮网法
热分析法
氧化特性
自然发火期
spontaneous combustion tendentiousness, ignition temperature, oxide adsorption method, cross point temperature method, basket method, thermal analysis method, oxidation characteristics, spontaneous combustion period
