CaCl_(2)溶液对煤自燃的阻化效果的影响实验研究  

Experimental study on the effect of CaCl_(2) solution on the inhibition effect of coal spontaneous combustion

作　　者：薛恩思 XUE En'si(China Coal Technology and Engineering Group Shenyang Research Institute,Fushun 113122,China;State Key Laboratory of Coal Mine Disaster Prevention and Control,Fushun 113122,China)

机构地区：[1]中煤科工集团沈阳研究院有限公司,辽宁抚顺113122 [2]煤矿灾害防控全国重点实验室,辽宁抚顺113122

出　　处：《煤矿安全》2024年第10期64-71,共8页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(52174230)。

摘　　要：将质量分数为20%的CaCl_(2)溶液作为阻化剂,将原煤分别置于不同温度(30、50、70、90℃)的CaCl_(2)溶液中浸泡不同时长,以制备不同预阻化程度的煤样,借助程序升温实验和红外光谱实验,研究CaCl_(2)溶液对煤自燃的阻化效果。结果表明:随着预阻化温度的升高和预阻化时长的增加,煤表面活性基团(-CH_(3)、-CH_(2)和-COOH、-C=O)的含量以及煤耗氧速率显著降低,预阻化率和交叉点温度明显提高;提高预阻化温度和增加预阻化时长均能够明显提高阻化剂对煤自燃特性的抑制率。In this paper,CaCl_(2) solution was used as an inhibitor.Raw coal was soaked in CaCl_(2) solution with a mass concentration of 20%,and inhibited coal samples were prepared at different temperature conditions(30℃,50℃,70℃and 90℃)for different peri-ods of time.The inhibition effect of CaCl_(2) solution on coal spontaneous combustion was studied through temperature programmed tests and infrared spectrum experiments.It was found that the content of surface active groups(-CH_(3),-CH_(2),-COOH,-C=O)and coal oxygen consumption rate decreased significantly with the increase of pre-inhibition temperature and pre-inhibition time.The in-hibition rate and cross point temperature also increase significantly.The results show that increasing the pre-inhibition temperature and the pre-inhibition time can obviously improve the inhibitory effects on the spontaneous combustion characteristics of coal.

关 键 词：煤自然发火 卤盐 无机阻化剂 预阻化 阻化率 交叉点温度 

分 类 号：TD752.2[矿业工程—矿井通风与安全]