摘要
以某公司断面160mm×160mm小方坯为研究对象，利用数值模拟和物理模拟相结合的方法，对小方坯内注流偏流进行了分析。研究表明，小方坯流场偏流是由于结晶器弧度的存在和要求对中所产生的，偏流会使得内弧侧的坯壳变薄，并且使液面的流场不对称，容易产生速度过大的点，进而发生卷渣。为解决这一问题，将水口向外弧侧偏移6～8mm，偏移后孔洞数下降30％以上，内外弧差异基本消除，经现场统计铸坯表面凹陷、结晶器卷渣发生率分别下降21％、56％。
Taking the billet with a section of 160 mm × 160 mm as the object of study, the fluid flow bias in the billet was analyzed by using numerical simulation and physical simulation. The results show that, the billet flow bias is due to the existence of the crystallizer radian and the center line alignment. The billet flow bias will make the shell of the inner arc side thin, the liquid flow asymmetric, and the high speed point easy to arrive. Furthermore, slag entrapment is easily occurred. In order to solve this problem, the mould nozzle is offset 6-8 mm outward arc side. After offset, the number of pore defects declined more than 30 %; the arc difference inside and outside was basically eliminated. The statistics show that the billet surface depression and mould slag entrapment rate decreased by 21%, 56 % respectively.
出处
《炼钢》
CAS
北大核心
2014年第5期52-56,共5页
Steelmaking
关键词
小方坯
数值模拟
物理模拟
偏移
square billet
numerical simulation
physical simulation
offset
