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Erschienen in:
2020 | OriginalPaper | Buchkapitel
7. BOF Refractory
verfasst von : Subir Biswas, Debasish Sarkar
Erschienen in: Introduction to Refractories for Iron- and Steelmaking
Abstract
Is it BOF a “heart” of any steel sector? If yes, it is mandate to take extra care to keep it healthy through refractory management, lining practice and effective operational protocols. In this backdrop, this chapter concentrates on the refractory designing for the vessel and tap hole sleeve, and analyses probable wear mechanism through ternary phase diagram. Influence of gas purging and slag splashing on the refractory life of different zones, followed by zonal lining concept, is also being discussed systematically. MgO-C refractory lining wear is an inevitable circumstance, and discussed in consideration of refractory–slag interaction, reduction of MgO, metal infiltration with respect to critical pore diameter, thermal stress and spalling phenomena, impact caused by charging, and mechanical erosion and abrasion. Basic philosophy has been highlighted to improve the MgO-C refractory for BOF lining. Herringbone vessel relining and maintenance practice by gunning and patching are emphasized to improve the BOF lining life.