作者：FAN Muxu,HOU Xiaojing,FENG Zhiyuan,WANG Han,LIU Pengcheng,SHI Gan

作者单位：Sinosteel Luoyang Institute of Refractories Research Co., Ltd.

刊名：China’s Refractories

ISSN：1004-4493

出版年：2023-06-15

卷：32

期：2

起页：24-30

止页：

分类号：TQ175.1

语种：中文

关键词：

内容简介

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 1 370 and 1 500 ℃. 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 1 370 ℃ and melting corrosion happens at 1 500 ℃;(3) at 1 370 ℃, alkali vapor and mullite brick react and form a slag layer without volume effect; when the temperature increases to 1 500 ℃, 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.