单流中间包结构优化及工业试验

炼钢 ›› 2017, Vol. 33 ›› Issue (6): 30-36.

单流中间包结构优化及工业试验

林路1，李翔2，包燕平3

1.钢铁研究总院冶金工艺研究所，北京100081； 2.贵州理工学院材料与冶金工程学院，贵州贵阳550003； 3.北京科技大学钢铁冶金新技术国家重点实验室，北京 100083

接受日期:1900-01-01 出版日期:2017-12-05

Structural optimization and industrial tests of single flow tundish

Accepted:1900-01-01 Online:2017-12-05

摘要/Abstract

摘要： 通过采用相似比为1∶2的水模型对某厂中间包控流装置进行全因素正交试验，研究了下挡墙高度与位置对中间包流场的影响规律，找到最优的控流方式，并在现场进行了优化前后工业对比试验。研究结果表明：合理的下挡墙位置与高度组合对中间包内钢液流动行为有着重要作用，将原型中间包下挡墙向注流区移动1 m后（B15方案），中间包平均停留时间较原方案提高14.3 %，死区体积较原方案下降了10.58 %，滞止时间较原方案增加了11.8 %，并且包内钢水的流动状态得到较大改善；同时中间包后期w(T.O)较原型下降47.3 %，铸坯中大型夹杂物含量下降了62.3 %，优化后几乎没发现尺寸大于300 μm大型夹杂物，铸坯中全氧含量控制较稳定，夹杂物去除效果得到明显改善。

关键词: 中间包, 结构优化, 流场, 夹杂物, 钢液, 工业试验

Abstract: A similar ratio of 1∶2 water model was used to do the orthogonal experiments for the flow control device in slab casting tundishes, to study the influence rules of height and position of lower dam on the flow field, and find the optimal flow control mode. Furthermore, the contrast test between the prototype and optimized tundish was carried out in the steel plant. The results show that retaining a reasonable position and height of lower dam have important influence on the fluid flow behavior of molten steel in the tundish. After lower dam in prototype tundish was moved 1 m toward the injection flow area (scheme No.B15), compared with the prototype tundish, average resident time of optimized tundish was increased of 14.3 %, dead area ratio was decreased of 10.58 %, stagnation time was increased of 11.8 %, and fluid flow state of molten steel in tundish was improved. Meanwhile, T.O mass fraction in tundish was decreased of 47.3 %, the amount of macro inclusions in slab was decreased of 62.3 %, the macro inclusions with size of more than 300 μm were hardly found in the slab, and the total oxygen content in the slab was controlled more stably after optimization, so the removal efficiency of the inclusions was improved obviously.

Key words: tundish, structural optimization, flow field, inclusions, molten steel, industrial tests

林路1，李翔2，包燕平3. 单流中间包结构优化及工业试验[J]. 炼钢, 2017, 33(6): 30-36.

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