Asymmetric Fluid Flow with Stopper-rod Misalignment in the Water Model of Continuous Casting Process
(0) Continuous casting is predominantly used process to manufacture steel in the world. Quality of the steel manufactured through this process depends on lots of interdependent process conditions and flow parameters. One of the parameters is meniscus velocity. In stopper-rod continuous casting systems, misalignment of the stopper-rod effects detrimentally on the flow characteristics in the nozzle and mold. Abnormal flow in the nozzle leads to nozzle clogging1 and finally asymmetric flow in the mold which will cause abrupt meniscus velocity fluctuations. Three situations of stopper-rod, namely aligned, front misaligned and left misaligned have been considered. One-third scale water model is used for experimental investigation of these effects. Experiments have been performed for the surface velocity measurements using impeller velocity probes at two different positions where are symmetrical to the nozzle. The asymmetric flow between right and left sides in the mold was not appeared with aligned and front misaligned stopper-rod, but it is generated only in the left misaligned stopper-rod. The opposite sides to the stopper-rod misalignment in the mold have different velocity caused asymmetric flow at nozzle port. Furthermore the asymmetric intensity near nozzle is much higher, which causes the formation of vortex. These phenomena suggest the application of electromagnetic force to control the meniscus velocity under the misalignment of stopper-rod.
stopper-rod misalignment asymmetry fluid flow continuous casting
Hyun-Na Bae Go-Gi Lee Seong-Mook Cho Seon-Hyo Kim
Department of Materials Science and Engineering,Pohang University of Science and Technology,Korea
国际会议
上海
英文
2008-10-13（万方平台首次上网日期，不代表论文的发表时间）