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전기로 제강용 Al 및 Si 을 함유한 고탄소 마그네시아 연와의 스랙에 대한 내침식기구
박현수,김성만 대한금속재료학회(대한금속학회) 1988 대한금속·재료학회지 Vol.26 No.3
High Carbon(15∼30%) MgO bricks containing aluminum and silicon in addition to carbon were studied to understand the mechanism of their slag resistance. Samples chosen from the hot spots of electric arc furnace walls were sliced into thin pieces and polished. Polished surfaces were investigated using polarizing microscope, electron probe microanalyzer and X-ray diffractometer. As is the case of low carbon MgO brick, the formation of dense MgO layers were verified both in straight and Al and Si containing high carbon MgO bricks. In the Al and Si containing bricks, Si contributes to the densification of MgO layers by the oxidation to SiO₂followed by the formation of forsterite. It is also speculated that aluminum addition resulted in the formation of the dense structure of the brick by forming spinel with magnesium oxide.