About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
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Advances in Ferrous Process Metallurgy
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| Presentation Title |
A Novel Lab Scale Casting Simulator to Quantify Submerged Entry Nozzle Clogging |
| Author(s) |
Naziru Issaka Fuseini, Ronald O'Malley, Todd Sander, Jeffrey Smith, Haiming Wen, Laura Bartlett |
| On-Site Speaker (Planned) |
Naziru Issaka Fuseini |
| Abstract Scope |
A novel lab-scale method was developed to detect and quantify submerged entry nozzle (SEN) clogging during continuous casting by measuring apparent mass and buoyant forces of a crucible suspended in molten steel to indirectly determine the molten steel mass flow rate through an orifice. This rate was compared to a theoretical model to assess clogging based on orifice constriction. The method was tested in Mn-Si and Al-killed heats to evaluate clogging by MnO∙SiO₂ and Al₂O₃ inclusions formed under high oxygen supersaturation (~1000 ppm [O]). Scanning-electron-microscopy analysis of 3D morphology showed spherical MnO-rich MnO∙SiO₂ inclusions in the Mn-Si killed heat and coarsened, needle-like dendritic Al₂O₃ inclusions approximately 11 minutes after Al deoxidation. Complete clogging occurred in the Al-killed heat (clogging factor ≈ 0) within 20 seconds. In contrast, the Mn-Si killed heat exhibited minimal to no clogging (clogging factor ≈ 1). Microscopy revealed Al₂O₃ accretions concentrated at the nozzle entry port. |