Alkali Vapor Corrosion of Different Refractories at High Temperatures  

作　　者：FAN Muxu HOU Xiaojing FENG Zhiyuan WANG Han LIU Pengcheng SHI Gan 

机构地区：[1]Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,China

出　　处：《China's Refractories》2023年第2期24-30,共7页中国耐火材料（英文版）

摘　　要：Commercial high purity corundum brick,corundum-mullite brick,mullite brick,calcium hexaaluminate brick and calcium hexaaluminate-corundum brick were studied to investigate their reaction state and alkali vapor corrosion mechanism at 1370 and 1500℃.The results show that:(1)served in hot alkali vapor,the high-purity corundum brick has no obvious slag layer but expands dramatically;(2)the corundum-mullite brick shows obvious reactive expansion at 1370℃and melting corrosion happens at 1500℃;(3)at 1370℃alkali vapor and mullite brick react and form a slag layer without volume effect;when the temperature increases to 1500℃,the reaction melting corrosion intensifies;(4)the calcium hexaaluminate brick and the calcium hexaaluminate-corundum brick form a thin slag layer in alkali vapor,and the sample surface absorbs Na+to form a dense layer with small volume effect.

关 键 词：alkali vapor corrosion sodium carbonate calcium hexaaluminate CORUNDUM MULLITE 

分 类 号：TQ175.1[化学工程—硅酸盐工业]