Sep 13, 2009
Imaging the cross section distribution of molten steel flow in continuous casting nozzle using Electromagnetic Techniques
In the continuous casting of steel, control of molten steel delivery through the pouring nozzle, that is, a submerged entry nozzle (SEN) is critical to ensure an optimum laminar flow pattern in the casting mold and stable meniscus. The flow regime in the SEN influences the billet surface quality, cleanliness, and hence the value of the cast product. This is particularly important for casting low carbon aluminum killed steel as the flow profile is readily disrupted by the clogging problem due to the deposition of aluminum oxide particles on the inside of the SEN wall and exit ports. You can also Subscribe to FINAL YEAR PROJECT'S by Email for more such projects and seminar.
Achievement of a stable and quiescent flow between the tundish and casting mold is determined by a number of interrelated casting parameters, including steel mass flow rate, tundish metal level , pouring nozzle diameter, argon gas flow rate, and the amount of clogging within the stopper/slide gate and pouring nozzle.
Typical examples of steel flow patterns within an SEN are annular flow (a stream with a central air gap), central stream, and bubbly flow (argon bubbles with the stream) with the possible transition between flow modes during casting depending on the flow rate of steel and gas for the given casting conditions. An online flow visualization approach utilizing rugged and noninvasive sensors would be highly desirable.
Authors: Xiandong Ma, A.J. Peyton
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