Influence of non-uniform corrosion of refractory material in SEN wall on flow-field of bloom
SUN Yuqiu1, WANG Min1,2, ZHAO Jiaqi1, JIANG Luheng1, BAO Yanping1
1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China; 2. Technical Support Center for Prevention and Control of Disastrous Accidents in Metal Smelting, University of Science and Technology Beijing, Beijing 100083, China
Abstract：In order to study the effect of nozzle corrosion on the flow of molten steel in the mold, the mold of 55SiCr spring steel bloom with a cross section of 300 mm×390 mm was used as a prototype, which was studied by physical simulation and numerical simulation. A 1∶1 mold physical simulation experimental device was established, and the effects of casting speed and immersion depth on the mold flow field were obtained. Combined with the anatomical morphology of the nozzle, the corrosion model at the bottom of port of the submerged nozzle was established by Fluent numerical simulation software. The flow field in the mold and the interaction behavior of steel slag interface were simulated by using the combination of k-ε turbulence model and Volume of Fluid model (VOF). The results show that when the casting speed is 0.55 m/min, the average wave height is less than 0.5 mm, and when the immersion depth is 120 mm, the average wave height difference at the measuring point is 0.545 mm. The process parameters suitable for pouring are determined as follows: the casting speed is 0.65 m/min and the immersion depth is 130 mm. Nozzle corrosion will lead to mold bias, stream impact on the wall becomes stronger, velocity uniformity of steel-slag interface becomes worse, local vortex appears, the height difference of steel-slag interface increases from 21 mm to 28 mm, and the liquid surface is exposed.
孙宇秋, 王敏, 赵家七, 蒋露珩, 包燕平. 水口不对称侵蚀对大方坯结晶器流场影响规律[J]. 连铸, 2023, 42(6): 25-35.
SUN Yuqiu, WANG Min, ZHAO Jiaqi, JIANG Luheng, BAO Yanping. Influence of non-uniform corrosion of refractory material in SEN wall on flow-field of bloom. CONTINUOUS CASTING, 2023, 42(6): 25-35.
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2023, Vol. 42 
