高温煅烧下碳化硅质耐火板上的煤灰结渣特性  

Coal ash slagging characteristics of carborundum refractory liner during high temperature calcination

作　　者：何金桥[1] 陈冬林[1] 肖波[1] 

机构地区：[1]长沙理工大学能源与动力工程学院,湖南长沙410004

出　　处：《中南大学学报（自然科学版）》2012年第11期4526-4532,共7页Journal of Central South University:Science and Technology

基　　金：湖南省重点实验室开放基金资助项目(2010KFJJ007);长沙理工大学热能工程学科基金资助项目(2009年)

摘　　要：采用扫描电镜、能谱分析仪和X线衍射仪等对高温煅烧下煤灰在SiC耐火板上的煅烧渣样进行测试,并分析渣样的形貌、渣样成分及与SiC质耐火板之间的高温黏结结渣特性。研究结果表明:随着温度的升高,熔渣碱性金属氧化物的均匀成核结晶增强,促进耐火板表层SiO2保护膜解体,加速SiC在熔渣中扩散,这使得灰渣对SiC质耐火板的黏结作用在初始变形温度处最强,相应的结晶度最小,为49.68%。In order to study the slag characteristics of carborundum-based liner,the slag samples of the statics high-temperature slagging experiments were investigated by scanning electron microscopy（SEM）,energy dispersive spectrometer（EDS）,X-ray diffraction（XRD）,and the slagging samples’ properties of morphology and the sintering characteristics between ash compositions and corundum-based refractory liner in different atmospheres were studied.The results show that when the calcination temperature increases,it enhances the homogeneous nucleation of alkalinous metallic oxide in molten coal ash,and promotes SiO2 protective film of the surface of SiC-based refractory liner to break up and accelerate in the spread of SiC in molten coal ash.This makes the adhesive capacity between carborundum-based refractory liner with coal ash is the strongest while calcinating at the beginning deformation temperature,and the crystallinity of corresponding coal ash reduces to the minimum of 49.68%.

关 键 词：高温煅烧 结晶度 SiC 结渣特性 

分 类 号：TK229.63[动力工程及工程热物理—动力机械及工程] TK227.2