Corrosion Resistance Mechanism of MgO-ZrO₂ Brick in RH Degasser Slag

Abstract:

Slag corrosion resistance behavior of MgO-ZrO₂ refractory was investigated in this work. The results indicated that in the non-oriented electric steel slag system with a high ratio of calcia to silica, the slag resistance behavior of MgO-ZrO₂ composite could be described as follows: the ZrO₂ reacts with CaO forming the calcium zirconate compound which is densification encapsulating periclase lay. However, in the oriented electric steel slag system with a high concentration of silica and the low ratio value of calcia to silica, the slag corrosion resistance behavior of MgO-ZrO₂ composite is different. The ZrO₂ would react with CaO forming the calcium zirconate and simultaneously, one more product C₂S as well. C₂S has double response of strength and could increase corrosion resistance performance by blinding pore and thickening slag viscosity. Therefore, it is expected to be the major reason for the enhanced corrosion resistance behavior observed for MgO-ZrO₂ refractory.

• Periodical: Advanced Materials Research (Volumes 415-417)
• Pages: 2048-2052
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.415-417.2048
• Online since: December 2011
• Authors: Song Lin Chen, Lin Yuan, Zhong Qi Feng, Xi Jun Liu, Jia Lin Sun
• Keywords: Corrosion Resistance, Mechanism, Mg-ZrO₂ Brick, RH Degasser

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