SMS Siemag AG, Düsseldorf, Germany:

Wiens O., Dr., Department of Process Technology for Slab Continuous Casters, oliver.wiens@sms-siemag.com 

Moβner W., Referent, Technical Services

Reifferscheid M.,  Dr. Eng., Head of Department of Casting R & D

Vogl N., Dr., Department of Flow Simulation

RHI AG, Vienna, Austria:

Hackl G., Department of Simulation, Research and Development

Nitzl G., Department of Marketing und Technology

RHI AG, Vienna, Austria China Steel Corporation, Kaohsiung, Taiwan:

Shung-Sheng Kao,  Vice President Production Division

Hsin-Chin Kuo, Ass. General Superintendent

To provide optimum conditions for the operation of continuous casters in terms of casting speed, product variety and size, slab quality, trouble-free casting times, production and maintenance costs and energy savings, the correct measures must be taken already at the time of designing the plant. The submerged entry nozzle has a considerable influence here. SMS Siemag and RHI therefore have set themselves the target of developing a submerged entry nozzle and put it into operation at the work of China Steel Corp. in Taiwan that satisfies the whole range of requirements. The casting platform at the continuous slab caster No. 7 is displayed. Influence of surface flow in the mould on the slab quality is examined based on relation between mean paddle deflection and standard deviation, comparatively for current design and new design. Tendencies for bridging and slag entrainment are revealed. Second-generation submerged entry nozzle (SEN) with and without bottom slots is compared with standard SEN. Classification of the industrial trials applied low carbon grade and peritectic plate grade for different types of SEN is presented. Quantitative analysis of the mould level between standard and new submerged entry nozzles for slabs 250х1000–1250 mm and for average casting speed 1.40– 1.71 m/ min is done. Flow distribution for the new SEN is built in the range of height − 0.030–0.030 m and for velocity 0.030 m/s. Mould level quality in relation to casting speed was investigated comparatively for standard and new SEN designs.

1. Reifferscheid, M.; Mobner, W.; Wiens, O.: Successful Slab Caster Design, Intern. ATS Steelmaking Conf. 2006, 15.–16. Dez. 2006, Paris, Frankreich.

2. Schlüter, J.; Falkenreck, U.; Kempken, J.; Odenthal, H.-J.; Reifferscheid, M.; Vogl, N.: stahl u. eisen 128 (2008) Nr. 9, S. 69/82.

3. Vakhrushev, A.; Ludwig, A.; Wu, M.; Tang, Y.; Nitzl, G.; Hackl, G.: Modeling of turbulent melt flow and solidification processes in steel continuous caster with the Open Source software package Open-FOAM, Open Source CFD Internat. Conf. 2010, 4.–5. Nov. 2010, München.