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J. Korean Ceram. Soc. > Volume 36(1); 1999 > Article
Journal of the Korean Ceramic Society 1999;36(1): 30.
Slag에 의한 돌로마이트 클링커의 침식거동
박재원, 홍기곤
포항산업과학연구원 소재연구부문 내화재료연구팀
Corrosion Behavior of Dolomite Clinkers by Slag
For dolomite clinkers used as stamp materials, the corrostion behavior of those by slag was inverstigated between 1550$^{circ}C$ and 1650$^{circ}C$. Fe2O3 among slag components was selectively penetrated into the grain boundaries of dolomite clinkers. In hot face, the magnesioferrite was preferentially formed by Fe2O3 component contained in dolomite clinker rather than Fe2O3 of slag. The corrosion steps of dolomite clinkers by slag were found as follows ; (1) The dicalciumferrite was formed by the reaction of the calcia within dolomite clinkers with Fe2O3 of slag. (2) The magnesia within dolomite clinkers reacted with the dicalciumferrite to from magnesioferrite and the residual calcia within dolomite clinkers reacted with the dicalciumferrite to form magnesioferrite and the residual calcia was dissolved into slag. (3) The magnesioferrite was corroded by CaO-SiO2 compounds of slag. With the temperature of slag increased, the magnesioferrite layer in hot face was decreased for dolomite clinker without Fe2O3 while the layer thickness and grain sizes of magnesioferrite was increased for dolomite clinker with Fe2O3.
Key words: Dolomite Clinker, Dicalciumferrite, Magnesioferrite, Slag, Corrosion
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