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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。
In order to study the variation law of the main characteristic gas and magnetism with temperature during spontaneous combustion of coal, spontaneous combustion experiment of non-stick coal in Shenfu mining area was carried out by using coal spontaneous combustion experimental device, and the amount of characteristic gas at different temperatures was tested. The ancient Egyptian magnetic test instrument tested at room temperature and heat treatment after the specific magnetic susceptibility. The experimental results show that the particle size and magnetic field strength have an impact on the coal magnetism at room temperature. Before the spontaneous combustion of coal spontaneously changes, the amount of CO and CO 2 gas increases with the increase of temperature. In the stage of severe magnetic change, When the magnetic susceptibility increases sharply with the increase of temperature, the amount of CO and CO 2 gas production tends to be stable until it drops down. 270 ℃ is the critical point of the coal magnetic mutation, the C 2 H 4 and C 2 H 6 production in the vicinity of the critical point increases rapidly, and At 300 ℃ to 350 ℃ to increase the fastest rate.