（1. National Engineering Research Center for Equipment and Technology of C.S.R., Yanshan University, Qinhuangdao 066004, Hebei, China 2. National Engineering Research Center of Continuous Casting Technology, Beijing 100081, China 3. Dalian Design and Research Institute China, First Heavy Industries, Dalian 116600, Liaoning, China）
Abstract：For the characteristic of continuous casting super-large round bloom, a novel SEN (submerged entry nozzle) called umbrella type SEN was proposed to reduce the impingement depth of molten steel by its own structure and keep fluid flow and heat transfer distributed uniformly in circumferential direction. A coupled analysis mathematical model in continuous casting mold was presented, and the fluid flow, heat transfer and solidification of the molten steel in the mold were simulated. The superiority and rationality of the SEN were verified that the molten steel stream spouted from umbrella nozzle took the shape of upper and lower circulation loops, which can not only be convenient for inclusions and gas to float up, but also can decrease the penetration depth of the jet. Meanwhile, liquid steel with superheat was distributed uniformly at upper mold zone, and a noticeable increase of temperature was observed on meniscus which may benefit the melting of slag; solidified shell distributed uniformly in circumferential direction, thereby reducing the probability of longitudinal crack. Solidified shell was 31.2mm thick at the outlet of the mold at the casting speed of 0.35m/min, which can ensure the safety in production.
张兴中，郑学然，刘庆国，王超. 特大圆坯连铸用新型浸入式水口的设计与研究[J]. 钢铁, 2013, 48(12): 46-51.
ZHANG Xing-zhong,ZHENG Xue-ran,LIU Qing-guo,WANG Chao. Design and Investigation of a Novel Submerged Entry Nozzle Used in Super-Large Round Bloom Continuous Casting. Iron and Steel, 2013, 48(12): 46-51.
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2013, Vol. 48 
