Effects of Composition on Corrosion Resistance of MgO-Al2O3-C Refractory

doi:10.3969/j.issn.1005-3026.2015.09.012

Journal of Northeastern University:Natural Science ›› 2015, Vol. 36 ›› Issue (9): 1269-1272.DOI: 10.3969/j.issn.1005-3026.2015.09.012

• Materials & Metallurgy • Previous Articles Next Articles

Effects of Composition on Corrosion Resistance of MgO-Al₂O₃-C Refractory

ZHAO Shu-mao， MEI Guo-hui， ZHANG Jiu， XIE Zhi

School of Information Science & Engineering， Northeastern University， Shenyang 110819， China.

Received:2014-07-30 Revised:2014-07-30 Online:2015-09-15 Published:2015-09-14
Contact: ZHAO Shu-mao
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Abstract

Abstract: The proportion of raw materials has an important influence on corrosion resistance of MgO-Al₂O₃-C refractory besides working conditions. MgO-Al₂O₃-C samples were prepared with different type of fused magnesia and various amounts of Al₂O₃ and graphite. Their corrosion rates in CaO-rich slag were investigated by rotating the samples in the molten slag. The effect of composition on the corrosion resistance of MgO-Al₂O₃-C refractory was studied. The results showed that the corrosion resistance decreases as the magnesia’s impurity increases. And with the increase of Al₂O₃ and graphite content， the corrosion resistance increases firstly and then decreases. Excessive Al₂O₃ results in viscosity decrease of slag， and excessive graphite results in porosity increase. Thus， for MgO-Al₂O₃-C refractory that used under CaO-rich slag， the ideal Al₂O₃ content is 10%~30% and the graphite content is 10%~20%.

Key words: MgO-Al₂O₃-C, corrosion resistance, dynamic corrosion test, carbon content;aggregate dissolution

CLC Number:

TB35

ZHAO Shu-mao， MEI Guo-hui， ZHANG Jiu， XIE Zhi. Effects of Composition on Corrosion Resistance of MgO-Al₂O₃-C Refractory[J]. Journal of Northeastern University:Natural Science, 2015, 36(9): 1269-1272.

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Effects of Composition on Corrosion Resistance of MgO-Al₂O₃-C Refractory

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