Corrosion Behavior of Slags Containing TiO2 to Al2O3 Ceramic Cup During Blast Furnace Ironmaking Process

Journal of Iron and Steel Research ›› 2013, Vol. 25 ›› Issue (12) : 17-22.

WEI Meng-fang,ZHANG Jian-liang,MAO Rui,ZHAO Yong-bin

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Abstract

In order to effectively protect the hearth lining of the blast furnace by using materials containing titanium, the corrosion behavior of slags containing TiO2 to Al2O3 ceramic cup was experimentally investigated through slag resistance test in static crucible and calculation of slag quantity by mass conservation of CaO. The effect of temperature, reaction time and slag binary basicity on the corrosion behavior was studied, and the corrosion mechanism was discussed. The results show that increasing temperature and prolonging reaction time can lead to an increase of corrosion of Al2O3 ceramic cup by the slags with TiO2, whereas the corrosion shows a decrease trend with the increase of slag binary basicity. The corrosion mechanism can be summarized as that: CaO and SiO2 in slag will react with Al2O3 from ceramic cup to form CA6, C2AS and CAS2; the formed CA6, C2AS and CAS2 will dissolve into slags； some high-melting-point minerals such as MA and CA2 near the original brick layer of ceramic cup will be formed to make slag more viscous.

Key words

slag containing titanium dioxide / Al2O3 ceramic cup / corrosion mechanism / method of CaO mass conservation

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WEI Meng-fang,ZHANG Jian-liang,MAO Rui,ZHAO Yong-bin. Corrosion Behavior of Slags Containing TiO2 to Al2O3 Ceramic Cup During Blast Furnace Ironmaking Process[J]. Journal of Iron and Steel Research, 2013, 25(12): 17-22

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