Simulation of the Filling of a Liquid Steel Sampler
2010 (English)In: Steel Research International, ISSN 1611-3683, Vol. 81, no 9, 749-758 p.Article in journal (Refereed) Published
Steel samples extracted from the ladle furnace in liquid state are vital to monitor the steel making process in the iron & steel industries. The main function of the steel sample is to exam whether the steel is at the aimed composition for elements that dissolve in steel. In addition, more interest is arising to determine the inclusion characteristics in steel samples, in order to monitor the development throughout the process. However, the molten steel sampling is a process involving multi-phenomena such as a high temperature, a fast solidification, reoxidation of steel and a highly turbulent flow pattern. Therefore, mathematical simulations have been carried out to fundamentally study the sampler filling process. The Wilcox k-ω turbulence model was employed to predict the turbulent flow. The calculated results show that flow patterns inside the sampler can be classified into three distinct flow regions: the vortex flow region close to the free surface, the lower horizontal flow region and the middle vertical flow region. From the flow and turbulence data, the inclusion particle collision volume rate was calculated to study the influence of turbulent flow on the inclusion growth in the sampler during fillings. It is shown that the collision volume in the sampler is much higher than that found in the ladle furnace, where the steel sampling normally takes place. This is due to the high turbulence energy dissipation rate in the samplers compared to the ladles.
Place, publisher, year, edition, pages
2010. Vol. 81, no 9, 749-758 p.
steel sampler, simulations, turbulent flow, Wilcox k-ω turbulence model, turbulence energy dissipation rate, collision volume
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-24415DOI: 10.1002/srin.201000107ISI: 000281912200008ScopusID: 2-s2.0-77956585289OAI: oai:DiVA.org:kth-24415DiVA: diva2:349543
QC 201009072010-09-072010-09-072011-11-06Bibliographically approved