CAJ | 학술논문

采用扫描电镜、能谱分析仪和X射线衍射等方法对燃煤电站锅炉SiC质卫燃带上结渣的渣样进行了测试，并就渣样的形貌、结晶物相转化特性及其渣样成分分布进行了分析研究．结果表明：煤颗粒的不充分燃烧造成碱性金属阳离子向SiC耐火板侧发生扩散，但难以穿过耐火板表层的SiO2保护膜，从而与SiC质卫燃带通过机械结合的方式相互黏结在一起；方晶石和鳞石英易与耐火板发生熔融冶金结合，形成较强的黏结作用，但是耐火板处熔融的片状鳞石英和方晶石含量较少，因此渣、板之间总体的黏结作用较弱．
채용소묘전경、능보분석의화X사선연사등방법대연매전참과로SiC질위연대상결사적사양진행료측시，병취사양적형모、결정물상전화특성급기사양성분분포진행료분석연구．결과표명：매과립적불충분연소조성감성금속양리자향SiC내화판측발생확산，단난이천과내화판표층적SiO2보호막，종이여SiC질위연대통과궤계결합적방식상호점결재일기；방정석화린석영역여내화판발생용융야금결합，형성교강적점결작용，단시내화판처용융적편상린석영화방정석함량교소，인차사、판지간총체적점결작용교약．
In order to study the coal ash slagging behavior on surface of carborundum-based refractory liner in a coal-fired boiler, slag samples taking from the liner were investigated by Scanning Electron Microscopy （SEM）, Energy Dispersive Spectrometer （EDS） and X-ray diffraction（XRD）, during which the specific morphology, phase transformation and component distribution were analyzed. Results show that the in- complete combustion of pulverized coal makes alkaline metal ion diffuse to the refractory liner, which then sticks on the liner mechanically, because it is hard to permeate through the SiO2 protective film covering the liner. Metallurgical bonding lies between the cristobalite/tridymite and the liner, and the bonding be- tween plate-like tridymite and the liner is very strong. Since the content of plate-like tridymite in the slag is very little, so the comprehesive bonding force is relatively weak between the slag and the liner.