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Interface Behaviour and Corrosion Behaviour of Magnesia Refractory by Alkaline Slag in an Alkali Recovery Furnace by Guishi Cheng; Tengfei Zhao; Binbin Chen; Yihao Yang; Xiaoqiang Wang; Changqing Dong; Ying Zhao is a scholarly article available to read on EtoBox.

What is Interface Behaviour and Corrosion Behaviour of Magnesia Refractory by Alkaline Slag in an Alkali Recovery Furnace about?

The adhesion of Na 2 CO 3 slag to the surface of refractories in an alkali recovery furnace can cause corrosion and spall. Magnesia refractories can be used as linings in alkali recovery furnaces owing to their strong corrosion resistance to alkali slag. However, the permeability resistance of magnesia refractories is relatively poor. Hence, the interface and corrosion behaviours of slag cladding on magnesia refractories were studied using sessile drop and static crucible tests. The experimental results showed that an increase in the heating rate positively affected the cladding of the molten column on the refractory surface. The microstructure, element changes, and chemical composition changes of the corroded refractories were analysed using SEM-EDS and XRD. Thermodynamic simulation of the reaction between the slag and refractory was performed using Factsage 7.3. The results indicate that the generated forsterite filled the pores of the magnesia refractories. The microstructure of dense slagrefractory interface layer was formed, which prevented the infiltration of slag phases and alleviated the corrosion of refractories by the slag.

Author

Guishi Cheng; Tengfei Zhao; Binbin Chen; Yihao Yang; Xiaoqiang Wang; Changqing Dong; Ying Zhao

Publisher

Elsevier BV

Published

2022

Language

EN