摘要
国内首家建设的12机12流连铸机的中间包属于特殊不对称型中间包,包内各流之间的流动特征存在着明显的差异,造成操作困难。采用1∶3缩小比例的水模型和"刺激-响应"方法,对其内流场进行研究,并开发了D型控流装置。该装置在模型中能有效地将各流之间的最大平均停留时间差从546 s降到50 s,死区从26.8%下降到12.9%,还能有效地降低中间包的不对称度和提高钢液在中间包内的平均停留时间。这对均衡各流的操作参数,提高铸坯质量起到重要作用。
The first twelve-strand tundish of continuous caster built at home belongs to a special asymmetrical type. The fluid flow characteristics of molten steel at each nozzle show marked difference. With a 1 = 3 scale water model and the method of ＂stimulation and response＂, the fluid field in the tundish is studied and the device of type D is developed. It is found that this device can efficiently reduce the maximum average residence time difference of individual flows in the model from 546 s to 50 s and the dead region from 26.8% to 12.9%, lower the asymmetrical degree, prolong the average residence of the fluid, which is important in balancing the operation parameters of individuals flow and promoting steel quality.
出处
《武汉科技大学学报》
CAS
2007年第5期454-457,共4页
Journal of Wuhan University of Science and Technology
关键词
中间包
控流装置
平均停留时间
流动特征
tundish
flow control device
average residence time
flow pattern
