Abstract: The effect of submerging depth of long nozzle (50~105 mm) , flow rate ( casting speed) ( 0.7~0.9 m³/h) and relative location between dam and weir in water model of 40 t tundish for double strands slab casting at steelworks on behavior of liquid flow has been studied by established 1:3 water model of tundish using the methods including illuminating the different section layer of tundish water model with laser light and adding tracer agent to display the liquid flow characteristics. Simulation results show that process design with flow rate 0.8 m³/h, submerging depth of long nozzle 93 mm and weir moving into dam by 1 cm is reasonable, and with the optimized process the liquid flow condition in tundish is better it is available to decrease dead zone ratio and favourable to remove inclusions from liquid and float off.

Key words: Double Strands Slab Casting, 40t Tundish, Water Model, Flow Behavior, Dead Zone Ratio

摘要： 通过中间包1:3水力学模型,利用激光片光源对中间包水模型进行切片照射、加入示踪剂显示流体流动特性等手段,研究了钢厂板坯连铸双流40 t中间包水模型挡墙挡坝的相对位置,长水口插入深度（50~105mm）和流量（拉速）(0.7~0.9 m³/h)对流动行为的影响。结果表明,流量0.8 m³/h、长水口插入深度93 mm、挡坝内移1 cm的工艺设计较为合理,优化后工艺条件下中间包流动状态较好,有利于减少"死区"比例和夹杂物上浮去除。

关键词: 双流板坯连铸, 40t中间包, 水模型, 流动行为, 死区比例