Electromagnetic Devices for Continuous Steel Casting TundishesReportar como inadecuado

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1 ABB Corporate Research Center 2 CoE Metallurgy Products, Process Automation-Industry Solutions

Abstract : Electromagnetic EM devices such as electromagnetic stirrer EMS and brake EMBR are extensively being used in steel industry across various processes in furnaces, ladles and casters. The application of EM devices in tundish is not well known despite the fact that tundish offers huge potential to improve steel cleanliness and overall melt quality, due to the availability of large surface area, before the melt is solidified in the mold. This article focuses on to develop EMS and EMBR for tundishes by way of quantifying their benefits in the process. For slab casting, a -T- shape two strand tundish is considered and for billet casting a -V- shape six strand tundish is considered for the analysis. Simulations of various combination of EMS and EMBR configurations are carried out for both two and six strand tundish to obtain better fluid flow characteristics, melt thermal homogenization and steel cleanliness. EM devices when used in tundishes influence the melt to reduce the temperature variations from around 15-17K to 5-7K besides avoiding short circuiting, compositional segregation with better control on strands temperature while significantly improving inclusion floatation to produce cleaner steel. A surface heater canbe included in the tundish along with EM device to maintain strands temperature at desired level while achieving optimum superheat to cast better quality steel and avoiding nozzle freezing.

Keywords : Electromagnetic stirrer EMS Electromagnetic brake EMBR Temperature homogenization inclusion removal tundish heater

Autor: Rajneesh Chaudhary - K. Ravi Kumar - Martin Seden - Bengt Rydholm - Jan-Erik A. Eriksson - Hongliang Yang -

Fuente: https://hal.archives-ouvertes.fr/


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