水煤浆气化炉用高铬砖损毁机制的研究  

Damage mechanism of high chrome bricks for coal slurry gasifiers

作　　者：王俊涛[1] 陈松林[1] 袁林[1] 闫昕 麻晓光[1] 吴兴胜 吴跃峰 Wang Juntao;Chen Songlin;Yuan Lin;Yan Xin;Ma Xiaoguang;Wu Xingsheng;Wu Yuefeng(Ruitai Materials Technology Co.,Ltd.,China Building Materials Academy,Beijing 100024,China)

机构地区：[1]中国建筑材料科学研究总院瑞泰科技股份有限公司,北京100024 [2]宜兴瑞泰耐火材料有限公司,江苏宜兴214200

出　　处：《耐火材料》2020年第6期498-502,共5页Refractories

基　　金：国家重点研发计划项目(2019YFC1907002);北京市科技新星项目(xx2018082)。

摘　　要：为了探明高铬砖在水煤浆气化炉服役中损毁的机制,采用XRD、SEM和EDS等方法研究了水煤浆气化炉用后高铬砖的形貌和相组成演变。结果表明:液态渣沿着高铬砖的气孔等缺陷侵入高铬砖,高铬砖中的氧化锆向熔渣中熔损形成反应脱锆层和熔洞,同时渣中的FeO和MgO与高铬砖中的Cr2O3和Al2O3反应生成(Mg,Fe)(Al,Cr)2O4复合尖晶石反应层;由于侵蚀反应层(渗透反应层和反应脱锆层)与原砖层的热物理性能差异,在温度波动下产生应力集中和裂纹,造成结构剥落损毁。In order to reveal the damage mechanism of high chrome bricks for coal slurry gasifiers during service,the morphology and the phase composition evolution of used high chrome bricks were researched using XRD,SEM and EDS.The results show that the liquid slag intrudes into the high chrome bricks along the pores and other defects,and the zirconia in high chrome brick melts into slag to form a reaction dezirconia layer and melting holes.At the same time,the FeO and MgO in slag react with Cr 2O 3 and Al2O3 in high chrome bricks to form a(Mg,Fe)(Al,Cr)2O 4 composite spinel layer;due to the difference of thermal and physical properties between the corrosion reaction layer(the penetration layer and the reaction dezirconia layer)and the original brick layer,the stress concentration and cracks occur under the temperature fluctuation,resulting in structural spalling and damage.

关 键 词：高铬砖 侵蚀机制 水煤浆气化炉 煤渣 

分 类 号：TQ175[化学工程—硅酸盐工业]