Degradation behaviors of cement-free corundum-spinel castables in Ruhrstahl Heraeus refining ladle: Role of infiltrated steel. Issue 22 (15th November 2021)

• Record Type: Journal Article
• Authors: Cheng, Yaping; Zhang, Yu; Li, Yuanyuan; Chen, Junfeng; Xiao, Junli; Wei, Yaowu; Liu, Guangping; Li, Guangqiang; Zhang, Shaowei; Li, Nan
• Is Part Of: Ceramics international. Volume 47:Issue 22(2021)
• Page Start: 32008
• Page End: 32014
• Publication Date: 2021-11-15
• Subjects: Spinel-containing refractories -- Corroded microstructure -- Corrosion mechanism -- Molten steel; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.08.087
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Chemical attacks and structural spalling dominated the degradation process of the refractory lining in refining ladle. In the present work, we have fabricated a cement-free gel-bonded corundum-spinel castables and examined the degradation behavior in contact with the molten steel/slag. Further, the role of infiltrated steel/slag associated with cracks on the spalling behavior were elucidated. The stress cracks formed on the corroded interface, providing a permeation pathway for molten corrosive species and acting as a sub-surface for further corrosion. Infiltrated steel contributed to the formation of composite (Mg, Fe)Al2 O4 spinel and led to an additional corrosion and induced a large structural spalling. Besides, macro-scale structural spalling of the refractory lining and microscale spalling of aluminate aggregates were discussed in detail, respectively.