PR-370-144 - 2016 AISTech Conference Proceedings

Effect of Nozzle Port Angle on Mold Surface Flow in Steel Slab Casting

Cho, Thomas, Lee, Kim

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Abstract:
Nozzle port angle is a critical parameter controlling fluid flow in the continuous casting mold, especially across the top surface. Fluid flow calculations with a three-dimensional (3-D) k-D model and die-injection experiments on a 1/3 scale water model were performed to quantify the effects of nozzle angle on flow pattern and surface flow. Calculated results are compared with surface velocity measurements with an electromagnetic sensor. The 15 up-angled nozzle produces more severe jet wobbling for the conditions simulated, resulting in lower velocity and higher velocity fluctuations at the surface. This could increase surface cracks, powder entrapment, and associated downstream problems, especially in advanced highstrength steels.


Keywords: continuous casting, surface instability, jet flow, standard k-tabilit, water model