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J. Korean Ceram. Soc. > Volume 36(4); 1999 > Article
Journal of the Korean Ceramic Society 1999;36(4): 410.
CaO-Al$_2$O$_3$-SiO$_2$계 슬래그와 스피넬의 반응에 미치는 스피넬중의 MgO함유량의 영향
조문규, 홍기곤
포항산업과학연구원 재료공정연구센터 고온내화재료 연구팀
Effects of MgO content of Spinel on the Reaction of Spinel with CaO-Al$_2$O$_3$-SiO$_2$ Slag
The reactivity of three kinds of spinels which CaO-Al2O3-SiO2 slag was investigated in terms of mineral phases and microstructures. New crystal products were not formed by reaction of 12CaO.7Al2O3 in the slag with spinels and free MgO components was preferenctially dissolved into slag for MgO-rich spinel and stoichiometric spinel. Meanwhile mineral phase was changed from 12CaO.7Al2O3 to CaO.Al2O3 to CaO.2Al2O3 finally to CaO.6Al2O3 having high melting point for Al2O3 -rich spinel. The Fe-oxide component of the slag was taken up by only stoichiometric spinel grains within the spinel clinker and the trapped amount of Fe-oxide was independent of MgO content of MgO in spinel clinker the more th resistance to slag corrosion but the less resistance to slag penetration.
Key words: Spinel, Slag, Phase, Al$_2$O$_3$ -spinel Castable, corrosion, Penetration
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