Erosion Mechanism of Al_(2)O_(3)-SiC Castables for Lining Maintenance in Blast Furnace Hearths

作     者：SUN Saiyang MA Xiaoqing WANG Xingwei ZHAO Yong ZHANG Ronghui FEI Weibao SUN Saiyang;MA Xiaoqing;WANG Xingwei;ZHAO Yong;ZHANG Ronghui;FEI Weibao

作者机构：Beijing Allied Rongda Engineering Material Co.Ltd.Beijing 101400China Nanjing Allied Rongda Engineering Material Co.Ltd.Nanjing 210036China Dalian Special Steel Co.Ltd.Dalian 116105China 

出 版 物：《China's Refractories》 (中国耐火材料（英文版）)

年 卷 期：2022年第31卷第2期

页      面：17-23页

学科分类：080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：alumina-silicon carbide castables blast furnace hearth repair erosion mechanism thin-wall lining 

摘      要：Al_(2)O_(3)-SiC castables,for the relining of BF hearths in mid-campaign repair,were sampled and investigated after two years’*** 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 *** results show that as gaseous K diffuses in the castables,leucite(KAlSi_(2)O_(8))and multiple cracks are *** iron and slag penetrate through the cracks to form anorthite([Ca,Na][Al,Si]_(4)O_(8))and iron,which will not form an embrittlement layer similar to carbon *** entire repair of the hearth with Al_(2)O_(3)-SiC castables combined with the design of thin-wall lining hearth eliminates“elephant foot shapederosion,greatly prolonging the service life of the hearth lining.