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1 Introduction Nonmetallic inclusion is a critical factor influencing the cast product quality, which can cause surface defects and fatigue failure of steel [1, 2]. The formation of inclusions is related to the chemical composition of liquid steel, secondary oxidation, slag entrapment, and refractory erosion. Small-sized inclusions exert a particularly significant influence on the performance of high-end steel [3].
Abstract In this paper, corundum porous permeable bricks with different coarse aggregate contents are prepared using particle packing method. Based on the similarity principle, a local water model of a tundish is designed to investigate the bubbling behavior in porous permeable bricks at various argon flow rates. Through dimensionless analysis, empirical formulas of bubbling region diameter and initial bubble size in porous permeable bricks are proposed.
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