欧冶炉竖炉围管用Si_(3)N_(4)结合SiC砖的损毁分析  

Damage analysis of Si_(3)N_(4) bonded SiC bricks for bustle pipes of OY shaft furnaces

作　　者：赵馨雨 杨文刚[2] 穆元冬 田果 吴吉光[2] 相宇博 叶国田[1] Zhao Xinyu;Yang Wengang;Mu Yuandong;Tian Guo;Wu Jiguang;Xiang Yubo;Ye Guotian(School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China;不详)

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450001 [2]中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室,河南洛阳471039 [3]新疆八一钢铁股份有限公司炼铁厂,新疆乌鲁木齐830022

出　　处：《耐火材料》2024年第6期513-516,共4页Refractories

基　　金：国家重点研发计划(2021YFB3701400)。

摘　　要：为了解欧冶炉还原竖炉围管用Si_(3)N_(4)结合SiC砖的损毁情况,对使用了两年的Si_(3)N_(4)结合SiC砖进行取样,针对用后砖试样的外观、物相组成、显微结构、元素组成等进行了分析研究。结果表明:1)用后砖有明显的蚀损情况,蚀损面粗糙,蚀损率达50%;2)用后砖的体积密度下降,显气孔率降低,氧化程度随着距工作面距离的增大而减弱;3)Si_(3)N_(4)结合SiC砖被欧冶炉中的气体氧化,反应生成SiO_(2),不适宜作为竖炉围管的炉衬材料。To investigate the damage of Si_(3)N_(4) bonded SiC bricks for the bustle pipe of OY reduction shaft furnaces,samples were taken from bricks that had been in service for two years.The appearance,phase composition,microstructure and element composition of the samples were analyzed.The results indicate that:(1)the used bricks show obvious erosion,with rough erosion surfaces and the erosion rate of 50%;(2)the bulk density and apparent porosity of the used bricks decrease,and the oxidation degree decreases with the increase of the distance from the working face;(3)Si_(3)N_(4) bonded SiC bricks are oxidized by the gas in the OY furnaces to form SiO_(2),which are not suitable as the lining materials for the bustle pipe of shaft furnaces.

关 键 词：欧冶炉 Si_(3)N_(4)结合SiC砖 氧化 损毁 

分 类 号：TQ175[化学工程—硅酸盐工业]