Journal
METALS AND MATERIALS INTERNATIONAL
Volume 16, Issue 3, Pages 501-506Publisher
KOREAN INST METALS MATERIALS
DOI: 10.1007/s12540-010-0601-y
Keywords
porous refractory; permeability; bubble; nozzle; continuous casting
Funding
- University of Illinois at Urbana-Champaign
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A water model has been applied to investigate initial bubble behavior using specially-coated samples of porous MgO refractory to simulate the high-contact angle of steel-argon refractory systems with different permeabilities. Air is injected through the porous refractory and travels through many inter-connected pores to exit the surface through active sites. An active site is a pore where bubbles exit from the surface of the porous refractory. The effect of refractory properties has been investigated in both stagnant and downward-flowing water. The number of active sites increases with increasing gas injection flow rate, permeability, and velocity of the downward-flowing water, and lower contact angle.
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