增钙粉煤灰矿物组成特性试验研究  

Experiment Study on Character of Mineral Component of Calcium-enriched Fly Ash of Low-sulphur Coal

作　　者：焦有宙[1] 毛鹏军[2] 郭前辉[1] 张全国[1] 

机构地区：[1]河南农业大学机电工程学院,河南郑州450002 [2]河南科技大学车辆与动力工程学院,河南洛阳471003

出　　处：《河南科技大学学报（自然科学版）》2007年第5期5-9,共5页Journal of Henan University of Science And Technology:Natural Science

基　　金：河南省科技攻关项目(0624250010)

摘　　要：以低硫兖州煤为试验煤种，在两段多相反应试验台上开展了低硫煤增钙粉煤灰矿物组成特性试验研究，对试验获得的粉煤灰进行XRD，SEM和EDS图谱分析。结果表明：兖卅l煤原状粉煤灰晶体主要由莫来石、石英、钙长石、赤铁矿等非水化活性矿物组成；随混合煤粉中CaO添加质量分数在0～25％范围的逐渐增加，增钙粉煤灰矿物组成中具有水化活性的2CaO·SiO2，3CaO·Al2O3等矿物出现并逐渐增加，非活性成分逐渐消失，但粉煤灰矿物组成中早强、高强矿物较少；当混合煤粉中再添加适量的MgO时，增钙粉煤灰矿物中出现水化活性优良的Q相矿物，且其质量分数为32．1％，粉煤灰矿物组成得到调整和优化。Low-sulphur Yanzhou coal was selected as experimental coal,and the experiment characters of mineral component of calcium-enriched fly ash were conducted on two-stage polyphase reaction setup.The collected fly ash samples were analyzed by X-ray diffraction(XRD),scanning electron microscope(SEM),and energy dispersive spectroscopy(EDS).The results showed that crystal mineral of fly ash of Yanzhou coal mainly consisted of mullite,quartz,anorthite,hematite and other un-hydraulic mineral.With the CaO content of agglomeration coal powder gradually increasing at the range of 0～25%,hydraulic minerals of 2CaO·SiO2,3CaO·Al2O3 showed up and gradually increased,and inertia mineral disappeared.But content of early and high hydration strength mineral in coal fly ash was lower.When agglomeration coal powder was added with suitable content MgO,quaternary phase of better hydration performance accounting for 32.1% of coal fly ash came into being,and mineral components of coal fly ash of Yanzhou coal cogeneration were ameliorated.

关 键 词：粉煤灰 煤粉炉 增钙 矿物组成 

分 类 号：X773[环境科学与工程—环境工程]