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Prof. Dr. Mohamed El-Anwar (Doctoral)

Thesis Title

Modeling of Molten Steel Behavior Inside Molds of Continuous Casting

 

Awarding University and Year

Mechanical Design and Manufacturing-Faculty of Engineering-Cairo University-August 2005

 

 

Abstract

In this thesis mainly two finite element models are developed for quantitative and/or qualitative comparison between three different SEN designs used for thin slab caster in an industrial operating plant. These two models were re-employed as design tools to develop a new SEN design aiming at achieving better port exit flow pattern and in turn better steel behavior inside the mold specially under meniscus.

A parametric study on SEN design was done by changing casting conditions, to study their effect on SEN port exit flow pattern, meniscus velocity distribution, mold flow pattern, and metallurgical length. The results showed a superior performance when SEN plug angle is changed from 80° to 90°, and the port height is increased by up to 6.67%. Furthermore, web addition above the plug enhanced the SEN performance through increasing the SEN depth. The proposed new SEN design comparative study with current SEN showed good enhancement in performance to be achieved by making through hole in SEN bottom (as third port) and re-orienting the ports by 20º degrees downward. Reducing the mold turbulence and increasing meniscus (mold level) stability will increase steel quality and may increase the caster productivity if the cooling system can handle this increase. Although the comparison, between the three SENs implemented in operating plant, indicates the superiority of the current SEN design. The comparison between the proposed new SEN design and the current SEN showed that more meniscus stability can be achieved by using the proposed new design. Results of the proposed new SEN design proved that it is capable to reduce mold turbulence and to increase meniscus stability than all other SENs.