Physical Modeling of Gas Bubble Distribution with or without Electromagnetic Brake in Slab Continuous Casting Mold
In continuous casting technology, argon injection is employed to prevent nozzle clogging and promote the floating up of nonmetallic inclusions. Many studies show that the gas bubbles affects the flow structure dramatically. In order to control the flow pattern in the mold and then to obtain the high-quality slabs at a high casting speed,Electromagnetic Brake (EMBR) technique was developed. Multiphase flow phenomenon under electromagnetic damping in the continuous casting process are so complicated that so far studies are mainly by mathematical modeling, few physical modeling experiment works were published. In this primary study, resistance probes were applied to study the gas bubble flowing behavior with or without magnetic field.Including the gas bubble void fraction, the number of floating gas bubbles and the bubble pulse width are measured at different position. Since the magnetic field is imposed following issues were obtained: (1) The immersion depth of bubbles in mold can be reduced. (2) The bubbles carried to narrow wall were limited. (3) The bubbles entering downward circulation were decreased. (4)The proportion of bubble entering lower circulation was lessened with gas flow rate increase.
Continuous casting Electromagnetic field Gas bubbles Flow field
ZHANG Hao-bin LEI Zuo-sheng REN Zhong-ming ENG Kang ZHONG Yun-bo
Shanghai Key Laboratory of Modern Metallurgy & Material Processing,Shanghai 200072,China
国际会议
2008 International Symposium on Clean Steel(2008年洁净钢生产技术学术研讨会)
鞍山
英文
157-162
2008-09-17（万方平台首次上网日期，不代表论文的发表时间）