摘要
薄带连铸生产铸带过程中,熔池波动大小对铸带质量影响较大,而引起波动的主要因素来自浇铸本身的工艺特性及外部设备影响。针对宝钢的薄带连铸机组,按照相似准数建立了1∶1水模型装置,测定了吐出孔位置的液面波动情况。与此同时,采用湍流双方程模型及VOF方程建立了配套水模型的液面波动模型,利用该模型研究了结晶辊静止时,布流器吐出孔位置的熔池液面波动情况。结果表明,不考虑结晶辊转动时,波动主要由吐出孔流出的钢水引起,波动形式比较单一。此外,该研究考虑了铸带拉速、吐出孔浸入深度、吐出孔倾斜角度等因素对熔池液面波动的影响,并将计算模拟结果与水模型结果进行了对比,两者吻合较好。
Meniscus fluctuation in strip casting caused by casting process and equipment,has great influence on the surface quality. An 1∶ 1 water model was set up based on the equipment built in Baosteel and the fluctuation of meniscus was measured. In same time,a mathematical model,describing the meniscus fluctuation,was set up based on the turbulent k-ε model and VOF model.The meniscus fluctuation under the condition of stationary of roll was studied. It was indicated that the meniscus fluctuation was mainly caused by metal flow from tip holes of feeding system and showed simple fluctuation pattern. Besides,other factors,which had influence on meniscus fluctuation,such as casting velocity,immersion depth,spray angle of the nozzle etc. were considered in the present work. Good results achieved when comparing simulation results to physical model results.
出处
《宝钢技术》
CAS
2017年第3期9-13,共5页
Baosteel Technology
基金
上海市薄带连铸连轧工程技术研究中心(11DZ2282300)的资助
关键词
薄带连铸
物理模拟
数值模拟
布流器
strip casting
physical simulation
mathematical simulation
feeding system
