作者：SUN Saiyang1MA Xiaoqing1WANG Xingwei2ZHAO Yong2ZHANG Ronghui1FEI Weibao3

作者单位：1. Beijing Allied Rongda Engineering Material Co., Ltd.2. Nanjing Allied Rongda Engineering Material Co., Ltd.3. Dalian Special Steel Co., Ltd.

刊名：China’s Refractories

ISSN：1004-4493

出版年：2022-06-15

卷：31

期：2

起页：17-23

止页：

分类号：TF57;TQ175.732

语种：英文

关键词：

内容简介

Al2O3-SiC castables, for the relining of BF hearths in mid-campaign repair, were sampled and investigated after two years’ service. The chemical and mineralogical characteristics of the residual castables were analyzed by X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectrometry to study the erosion mechanism. The results show that as gaseous K diffuses in the castables, leucite(KAlSi2O8) and multiple cracks are formed. Molten iron and slag penetrate through the cracks to form anorthite([Ca,Na][Al,Si]4O8) and iron, which will not form an embrittlement layer similar to carbon bricks.The entire repair of the hearth with Al2O3-SiC castables combined with the design of thin-wall lining hearth eliminates “elephant foot shaped” erosion, greatly prolonging the service life of the hearth lining.