煤自燃过程特征气体与磁性变化规律实验研究
发布时间：2018-08-19 19:36
【摘要】：为了研究煤自燃过程中主要特征气体及磁性随温度的变化规律,利用煤自然发火实验装置对神府矿区的不粘煤进行自燃模拟实验,测试了不同温度下特征气体的产生量,并用改进的古埃型磁测仪测试了常温和加热处理后煤样的比磁化率。实验结果表明,常温下粒径、磁场强度对煤磁性均产生影响,煤自燃过程中磁性剧烈变化之前,CO和CO_2气体产生量随着温度的增大逐渐增大;磁性剧烈变化阶段,当煤比磁化率随着温度的升高急剧增大时,CO和CO_2气体产生量趋于稳定直至下降;270℃为该煤磁性突变的临界点,临界点附近C_2H_4和C_2H_6产生量迅速增大,并且在300℃至350℃增大速率最快。
[Abstract]:In order to study the variation of main characteristic gases and magnetic properties with temperature in the process of coal spontaneous combustion, the spontaneous combustion simulation experiment of non-caking coal in Shenfu mining area was carried out by using the coal spontaneous combustion experimental device, and the production of characteristic gases at different temperatures was tested. The specific magnetic susceptibility of coal samples after normal temperature and heating treatment was measured by an improved Gouye type magnetic meter. The experimental results show that the particle size and magnetic field intensity have an effect on the coal magnetism at room temperature, and the CO and CO_2 gas production increases with the increase of temperature before the dramatic magnetic changes in the process of coal spontaneous combustion. When the specific magnetic susceptibility of coal increases sharply with the increase of temperature, the production of CO and CO_2 gas tends to stabilize until the decrease of 270 鈩，
本文编号：2192626
[Abstract]:In order to study the variation of main characteristic gases and magnetic properties with temperature in the process of coal spontaneous combustion, the spontaneous combustion simulation experiment of non-caking coal in Shenfu mining area was carried out by using the coal spontaneous combustion experimental device, and the production of characteristic gases at different temperatures was tested. The specific magnetic susceptibility of coal samples after normal temperature and heating treatment was measured by an improved Gouye type magnetic meter. The experimental results show that the particle size and magnetic field intensity have an effect on the coal magnetism at room temperature, and the CO and CO_2 gas production increases with the increase of temperature before the dramatic magnetic changes in the process of coal spontaneous combustion. When the specific magnetic susceptibility of coal increases sharply with the increase of temperature, the production of CO and CO_2 gas tends to stabilize until the decrease of 270 鈩，
本文编号：2192626
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