Metallurgical and Materials Transactions B, Process Metallurgy and Materials Processing Science vol:34 issue:5 pages:533-538
The evolution of Al2O3-CaO inclusions on molten steel surfaces and at molten steel/slati interfaces was observed in-situ through a confocal scanning laser microscope (CSLM) equipped with a gold-image furnace. Depending on the slag chemistry, some of the initially liquid inclusions evolved into irregular Al2O3 or SiO2-enriched inclusions during the separation across the interface. Inclusions were found to Cluster at specific locations at the steel/slag interface. Unlike capillary-depression-driven Clustering, which is observed on molten steel surfaces, a weak repulsive force opposes fluid-flow-driven clustering at the steel/slag interface. After clustering, the irregular solid inclusions were observed to agglomerate to form large aggregates.