LWM煤灰与模拟煤灰热行为差异的研究  

Study on Thermal Behavior Difference between LWM Coal Ash and Factitious ash

作　　者：辛宇[1] 熊金钰[1] 刘象 李金知 李寒旭[1] 

机构地区：[1]安徽理工大学化学工程学院,安徽淮南232001

出　　处：《中国煤炭地质》2015年第7期66-67,70,共3页Coal Geology of China

基　　金：淮南市科技计划项目(2013A4007)

摘　　要：通过热重-差热分析(TG-DTA)和X射线衍射分析(XRD),分别对在N2、CO2、CO2/N2三种气氛下LWM煤灰和模拟煤灰的热行为进行分析。TG-DTA结果表明:LWM煤灰和模拟煤灰热行为有显著差异;与模拟煤灰相比,煤灰在更高的温度下发生矿物转化;在纯CO2气氛下时,模拟煤灰会出现吸附CO2的现象,而煤灰不会出现此种现象。XRD结果表明煤灰与模拟煤灰在高温下的晶体矿物均以莫来石为主。Through thermogravimetric-differential thermal analysis（TG-DTA） and X-ray diffraction analysis（XRD） carried out LWM coal ash and factitious ash thermal behavior analyses under N2, CO2 and CO2/ N2 three atmospheres respectively. The results of TGTDA have shown that the thermal behavior of LWM coal ash and factitious ash has significant difference. Comparing with factitious ash,mineral transformation of LWM coal ash should be happened under the higher temperature. Under the pure CO2 atmosphere, factitious ash will absorb CO2, while LWM coal ash not. The results of XRD have shown that crystalline minerals in LWM coal ash and factitious ash under high temperature are all mainly mullite.

关 键 词：模拟煤灰 热行为 TG-DTA 

分 类 号：P618.11[天文地球—矿床学]