Development and Application of Carbon-free Al_(2)O_(3)-MgO Dense Bricks for Steel Ladles  

作　　者：LUO Ming FANG Binxiang WEI Guoping LIU Guangping SHEN Mingke SONG Yanan 

机构地区：[1]Zhejiang Zili High Temperature Technology Co.,Ltd.,Shaoxing 312300,China [2]Zhejiang Zili Advanced Materials Co.,Ltd.,Shaoxing 312300,China

出　　处：《China's Refractories》2022年第2期35-39,共5页中国耐火材料（英文版）

摘　　要：Carbon-free Al_(2)O_(3)-MgO dense bricks were produced by the pressing method,using tabular alumina,white fused alumina,alumina micro-powder as main raw materials,and inorganic powder as the binder.The comprehensive properties and performance in steel ladle side wall were made a comparison between Al_(2)O_(3)-MgO dense bricks and precast blocks.The results show that Al_(2)O_(3)-MgO dense bricks exhibit high dense structure and strength,as well as superior thermal shock resistance and better penetration and corrosion resistance to slag than precast blocks.While replacing precast blocks with dense bricks in 250 t steel ladle side wall in some domestic steel mills,the thickness of the metamorphic layer from slag penetration and the corrosion rate decrease evidently.The damage of dense bricks during service is mainly caused by the corrosion from molten steel and slag,and the structure spalling of the metamorphic layer also plays an important role.

关 键 词：refining ladle alumina-magnesia material carbon-free dense brick precast block damage mechanism 

分 类 号：TF34[冶金工程—冶金机械及自动化] TQ175.1[化学工程—硅酸盐工业]