铝锆碳质长水口损毁机制的研究  

Wear mechanism of Al_2O_3-ZrO_2-C based shroud

作　　者：王建筑[1,2] 刘百宽[1,2] 张厚兴 潘磊 王作创 杨勤 

机构地区：[1]西安建筑科技大学材料科学与工程学院,陕西西安710055 [2]濮耐高温材料(集团)股份有限公司,河南濮阳457100

出　　处：《耐火材料》2011年第6期427-429,共3页Refractories

摘　　要：采用SEM、EDS对使用后的铝锆碳质长水口内壁及渣线部位材料的蚀损过程进行了分析研究。结果表明:1)铝锆碳质长水口内壁蚀损过程为碳首先被氧化和溶解形成脱碳层,之后钢水中的夹杂物FeO与脱碳层中的Al2O3反应形成铁铝尖晶石,随着FeO继续附着,在脱碳层表面形成FeO富集区并生成低熔点相,致使脱碳层在高速钢水的冲刷下逐渐蚀损;2)长水口渣线部位蚀损首先为碳向钢液中溶解,之后为中间包渣侵蚀材料中的氧化物,两个过程交替进行,从而导致了长水口渣线部位材料的蚀损;3)适当降低长水口制品中的碳含量,可以减少铝锆碳质长水口内壁以及渣线部位材料中碳的氧化及溶解所导致的材料结构的破坏,可望延长长水口的使用寿命。The erosion process of inner wall and slag line of used shroud was researched by SEM and EDS. The results are shown as follows. （ 1 ） The erosion process of shroud inner wall is that after carbon is oxidized and dissolved a decarbonization layer appears,then hercynite forms by the reaction of FeO in the molten steel and Al2O3 in the decarbonization layer. With FeO content increasing,a low melting point phase forms in the surface of the decarbonization layer,making the decarbonization layer eroded gradually by the flowing molten steel. （2）The erosion process of shroud slag line is that the carbon is dissolved firstly,then the slag of tundish reacts with the oxides,and the two processes alternate. （3）The wear of shroud due to the carbon oxidization and dissolution will be reduced by decreasing the carbon content in the shroud inner wall and slag line properly and the service life of ladle shroud is likely to prolong.

关 键 词：铝锆碳质长水口 蚀损 脱碳层 氧化 溶解 

分 类 号：TQ175.713[化学工程—硅酸盐工业]