ErosionMechanismofAl2O3-SiCCastablesforLiningMaintenanceinBlastFurnaceHearths

被引：1

作者：

SUN Saiyang ^{[1
]}

MA Xiaoqing ^{[1
]}

WANG Xingwei ^{[2
]}

ZHAO Yong ^{[2
]}

ZHANG Ronghui ^{[1
]}

FEI Weibao ^{[3
]}

机构：

[1] Beijing Allied Rongda Engineering Material Co, Ltd

[2] Nanjing Allied Rongda Engineering Material Co, Ltd

[3] Dalian Special Steel Co, Ltd

来源：

China's Refractories | 2022年 / 31卷 / 02期

关键词：

D O I：

10.19691/j.cnki.1004-4493.2022.02.004

中图分类号：

TF57 [炼铁炉（高炉）]; TQ175.732 [];

学科分类号：

080602 ; 0805 ; 080502 ;

摘要：

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.

引用

页码：17 / 23

页数：7

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