摘要
以某钢厂4流对称360 mm×480 mm方坯连铸中间包为研究原型,采用1∶3水模型试验和数值模拟相结合的方法研究不同控流装置对中间包内流场的影响,并得到最优的挡墙结构。结果表明,在中间包未添加控流装置时,2个水口停留时间很小,死区比例达到50.09%;采用优化后的Y型挡墙后,活塞区比例增大了14.22%,死区比例减小了32.49%,2个水口停留时间标准差较小。通过现场试验发现:中间包优化后,钢水w(T.O)降低45.61%,夹杂物总量从改造前的0.46 mg/kg降低到0.17 mg/kg。
Based on the prototype of a tundish for four-strands symmetrical casting 360 mm× 480 mm bloom, the effect of different flow control devices on flow field of liquid in tundish were studied by using geometric similarity raito 1：3 water model to get optimum baffle. Results show that average residence time in tundish without flow control device is rather small, and dead area volume fraction was 50. 09 % ; with using the optimum new Y-type baffle, piston flow zone in tundish increased by 14. 22 % and dead area volume fraction decreased by 32. 49%, the standard deviation of average residence time of two nozzle is small. On-site-experiment shows that T. O mass fraction in liquid in tundish is decreased by 45.61% and total inclusions are reduced from 0. 46 mg/kg to 0. 17 mg/kg.
出处
《炼钢》
CAS
北大核心
2015年第2期40-43,共4页
Steelmaking
关键词
4流中间包
数学模拟
物理模拟
流场
tundish of four strand casting
numerical simulation
physical simulation
flow field
