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01-10-2018 | Research and Development | Issue 6/2018

Interceram - International Ceramic Review 6/2018

The Interfacial Behavior of Alumina-Magnesia Castables and Molten Slag under an Alternating Magnetic Field

Journal:
Interceram - International Ceramic Review > Issue 6/2018
Authors:
Yongshun Zou, Ao Huang, Pengfei Lian, Huazhi Gu

Abstract

Electromagnetic metallurgical technology has become an important method for the smelting of high purity steel with the development of metallurgical technology. The electromagnetic fields existing extensively in the steelmaking process can not only affect the smelting efficiency and the cleanness of steel, but also the interfacial behavior between the refractory and the molten slag. Focusing on alumina-magnesia castables, an important lining material in ladles, the interfacial behavior between the castable and different ladle slags with or without an alternating magnetic field (AMF) is studied in this paper. The results showed that the slag corrosion and especially the slag penetration of the alumina-magnesia castable are more severe under an AMF. Moreover, an AMF accelerates the migration of Fe, Mn and their oxides from the molten slag to the castable. Meanwhile, some low melting point phases such as diopside and anorthite form in the corrosion layer of the castable, which was deduced to accelerate the slag corrosion and penetration of the alumina-magnesia castable.

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