镁盐阻化剂抑制煤自燃特性的实验研究  

Experimental study on the inhibition of spontaneous combustion characteristics of coal by magnesium salt inhibitor

作　　者：程子朦 李绍英 白丽梅 郭立稳 马玉新 赵留成 CHENG Zimeng;LI Shaoying;BAI Limei;GUO Liwen;MA Yuxin;ZHAO Liucheng(College of Mining Engineering,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]华北理工大学矿业工程学院,河北唐山063210

出　　处：《煤矿安全》2024年第1期126-131,共6页Safety in Coal Mines

摘　　要：为了研究镁盐(六水氯化镁+氢氧化镁)对煤自燃阻化特性的影响,利用同步热分析法、程序升温-气相色谱联用实验先后研究阻化剂用量和硅烷偶联剂的加入对煤自燃特征温度、热效应等方面的影响规律。结果表明:镁盐阻化剂添加量为_(30%)时阻化效果相对最好,热解温度T3比原煤样延后40℃,总放热量减少165.14 J/mg;加入硅烷偶联剂后的F@M_(30%)·G阻化煤样主要推迟煤体热解及着火的发生,其中热解温度T3较原煤升高49℃、着火温度T4升高26℃;F@M_(30%)阻化煤样可降低CO的体积分数,抑制煤自燃效果随温度升高逐渐增强,添加硅烷偶联剂后阻化煤样的CO体积分数能减少约4×10^(-6), F@M_(30%)阻化煤样的阻化率为30.87%、F@M_(30%)·G阻化煤样阻化率高达91.57%。In order to study the effect of magnesium salt(magnesium chloride hexahydrate+magnesium hydroxide)on the retarding characteristics of coal spontaneous combustion,the effects of inhibitor dosage and silane coupling agent on the characteristic temperature and thermal effect of coal spontaneous combustion were studied by synchronous thermal analysis and programmed heating-gas chromatography.The results of simultaneous thermal analysis showed that the inhibitory effect was relatively best when the magnesium salt inhibitor was added at 30%,the pyrolysis temperature T_(3) was delayed by 40℃ compared with the raw coal sample,and the total heat release was reduced by 165.14 J/mg.F@M_(30%)·G resisted coal sample adding silane coupling agent mainly delayed the occurrence of coal pyrolysis and ignition,in which the pyrolysis temperature T_(3) was 49℃ higher than that of raw coal,and the ignition temperature T4 was increased by 26℃.F@M_(30%)inhibited coal samples can reduce the volume fraction of CO,and the effect of inhibiting spontaneous combustion of coal is gradually enhanced with the increase of temperature.After adding silane coupling agent,the volume fraction of CO of inhibited coal samples can be reduced by about 4×10^(-6).The inhibition rate of F@M_(30%)inhibited coal samples is 30.87%,and that of F@M_(30%)·G inhibited coal samples is as high as 91.57%.

关 键 词：阻化剂 镁盐 煤自燃 特征温度 放热特性 阻化率 防灭火 

分 类 号：TD752.2[矿业工程—矿井通风与安全]