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针对某公司350 mm×150 mm断面连铸铸坯生产中易发生卷渣等一系列的质量问题,采用物理模拟和fluent凝固融化模型的方法 ,对结晶器钢液的表面流速、波高、凝固坯壳厚度等进行系统研究。结果表明:当倾角为15°、20°、25°时,倾角每增加5°,表面流速平均下降20%左右;浸入式水口的出口和中孔面积比由2.37变化到2.63,结晶器出口的坯壳平均厚度由18 mm减少为15 mm;出口面积比为2.63时坯壳有明显的变薄区域,最小的坯壳厚度区坯壳厚度为11 mm左右。通过一系列分析最终指出断面为350 mm×150 mm的结晶器,应当使用倾角为25°,出口与中孔面积比为2.42的水口进行生产。
Aiming at a series of quality problems such as entrainment in the production of 350 mm × 150 mm section continuous casting slab in a certain company, physical simulation and fluent solidification and melting model are used to analyze the surface flow rate, wave height, Shell thickness and other systematic research. The results show that when the inclination angle is 15 °, 20 ° and 25 °, the surface flow rate decreases about 20% on average every 5 ° dip angle; the ratio of outlet and mesopore area of immersion nozzle varies from 2.37 to 2.63, The average thickness of the shell decreases from 18 mm to 15 mm. When the exit area ratio is 2.63, the shell has an obvious thinning area. The minimum thickness of the shell is about 11 mm. Through a series of analyzes, it was finally pointed out that a mold with a section of 350 mm × 150 mm should be produced using a nozzle with an inclination of 25 ° and an outlet to mesopore area ratio of 2.42.