摘要
为净化钢液,提高夹杂物在中间包内的上浮率,通过水模型实验,对4流中间包不同挡墙形式下包内流场及夹杂物去除情况进行了模拟研究。结果表明:现用挡墙控流下的中间包同一侧两流之间的流体流动特性存在很大差异,与内侧相比,外侧流的最短停留时间、峰值时间长、死区体积大,造成中间包内钢液温度不均匀,夹杂物不能有效地上浮去除。改进后的挡墙能很好地解决各流间的同步性,死区比例比原型降低6.65%,对夹杂物的去除效果增强。工业试验表明,改进后的挡墙在降低总氧和夹杂物方面均优于原挡墙。
In order to purify the liquid steel and raise the floating rate of the inclusions in the tundish the flow field and removal of non-metallic inclusions in a four-strand tundish under different weirs have been studied by water model experiments. The results show that a big difference in flow characteristics exists between two outlets at the same side of the tundish controlled by the present weir. Compared to the inside outlet, the outside outlet has longer minimum residence time and peak concentration time and larger dead volume fraction. So the present weir can not meet the technical requirements for inclu- sion floatation and temperature homogenization. The improved weir can satisfactorily settle the flow synchronism between outlets. The dead volume fraction is decreased by 6. 65 0/60 and the removal effect for inclusions increases. The industrial test shows that the improved weir is better than the original one in reducing total oxygen and inclusions.
出处
《炼钢》
CAS
北大核心
2009年第2期41-44,共4页
Steelmaking
关键词
中间包
结构优化
停留时间分布
tundish
structural optimization
residence time distribution
