Abstract: The effect of position, diameter, inclination angle and elevation angle of retaining wall guide flow holes, dam and turbulence controller on average residence time and proportion of dead zone in a 32 t tundish for eight-strand casting has been studied with geometry similarity 1-3.5 water model and orthogonal test method. Test results show that the consistence of residence time with using optimized trapezoidal structure and V type structure of retaining wall is better than that of empty tundish and original tundish retaining wall structure； the effect of average residence time and proportion of dead zone with using V type retaining wall is better than that with using trapezoidal retaining wall； the comprehensive effect of trapezoidal retaining wall scheme with height of three flow guide holes- 500/300/400 mm, diameter of holes 80 mm, inclination angle 60°/65°/80° and elevation angle 0° is best. The commercial production test by desulphurized metal- 100 t top and bottom combined blown converter- LF- CC process indicated that with using the optimized V type retaining wall scheme the average total oxygen content in casting bloom decreases to 50. 5 X 10^-6 from 55. 6 x 10^-6 with original tundish.

摘要： 利用几何相似比1:3.5建立的水模型和采用正交试验研究了32 t 8流中间包挡墙导流孔位置、孔径、倾角及仰角、挡坝及湍流控制器等因素对平均停留时间、死区比例的影响。实验结果表明,梯形挡墙方案和V型挡墙结构优化方案对滞止时间一致性的都比空中间包和原型挡墙的效果好;V形挡墙的平均停留时间和死区比例优于梯形挡墙;采用挡墙上3个导流孔的高度为500、300、400 mm,孔径80 mm,倾角60°、65°、80°,仰角0°的梯形挡墙方案的综合优化效果较好。脱硫铁水-100 t顶底复吹转炉-LF-CC工业生产试验结果表明采用最佳的V形挡墙方案,铸坯中平均全氧含量由原型中间包的55.6×10^-6降至50.5×10^-6。