摘要
以兖州低硫煤为试验煤种,在两段多相反应试验台上开展了联产Q相水泥熟料的试验,对联产熟料样品中的矿物组成进行了X射线衍射(XRD)分析,发现联产熟料矿物组成中的主要矿物种类为2CaO.SiO2和Q相.根据状态函数吉布斯自由焓,对兖州煤联产Q相水泥熟料中化学组成可能发生的矿物生成反应进行了热力学计算,并对熟料矿物生成反应的优先顺序进行比较.结果表明:根据熟料化学组成,优先发生的反应是2CaO.Al2O3.SiO2的直接合成反应,其次为2CaO.SiO2的直接合成反应,再次为Q相矿物的间接合成反应;联产熟料矿物组成最终应以2CaO.SiO2和Q相矿物为主体;对联产熟料矿物生成反应热力学分析的结论与兖州煤联产Q相水泥熟料试验的矿物组成结果基本一致.
Taking Yanzhou low-sulfur coal as the test fuel,cogeneration experiments of quaternary phase（Q-phase） cement clinker were conducted on a two-stage multi-phase test setup,and subsequently the collected clinker samples were analyzed by X-ray diffraction（XRD）,in which the minerals were found to be mainly 2CaO·SiO_2 and Q-phase.Based on Gibbs free energy,the cement clinker composition and possible mineral reactions were thermodynamically calculated,and hence the reaction priority of mineral formation obtained.Results show that according to the clinker chemical composition,the most preferential reaction is the direct formation of 2CaO·Al_2O_3·SiO_2,followed by the direct formation of 2CaO·SiO_2,then the indirect formation of Q-phase.2CaO·SiO_2 and Q-phase take the majority in the cement clinker minerals.Thermodynamic analysis results of Qphase cement clinker minerals obtained with Yanzhou low-sulfur coal basically agree with that of the experimental results.
出处
《动力工程学报》
CAS
CSCD
北大核心
2010年第8期633-638,643,共7页
Journal of Chinese Society of Power Engineering
关键词
煤粉炉
联产
Q相水泥熟料
矿物生成反应
热力学
pulverized coal-fired boiler
cogeneration
Q-phase cement clinker
mineral formation reaction
thermodynamics
