四流方坯连铸机中间包控流装置的研究  

Study on the Flow Controlling Device of Four-strand Bloom Continuous Casting Tundish

作　　者：陈敏[1] 马振[1] 张体广[1] 马骏 胡道峰 李翔 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004 [2]南京钢铁联合有限公司炼钢厂,江苏南京210035

出　　处：《工业加热》2009年第1期39-41,50,共4页Industrial Heating

摘　　要：采用商业软件进行数值模拟和水模实验,考察了不同控流装置对南钢四流大方坯连铸机梯形中间包内钢液流动特性的影响,确定出湍流控制器+导流墙+坝的最佳控流方式。结果表明,原型中间包存在较大的死区,且各流间的流动特性差异较大,尤其是近水口的2流、3流存在明显短路流,不仅造成包内钢液温度分布不均匀,也不利于夹杂物的上浮,影响铸坯洁净度。采用优化后的组合控流装置能够显著改善中间包内钢水的流动状态,使钢液在各流间合理分配,并延长了钢水的平均停留时间,提高活塞流体积分率,降低死区体积分率,均衡了各流间的温度分布,有利于促进铸机生产顺行和铸坯质量的提高。The effect of flow controlling devices on the fluid flow characteristics of a four-strand trapeze tundish for bloom continuous casting in Nanjing Steel Plant has been investigated by using methods of numerical simulation and water model experiment. The results showed that appreciable volume of dead zone existed in the tundish, with large difference in the Residence Time Distribution （RTD） curves between the two outlets （such as strand 1 and strand 2） on the same side of impact zone under the elongated nozzle, and short circuit flow existed in strand 2 and strand 3 near the impact zone. The installation of combined flow controlling devices effectively improved the flow pattern in tundish, modified distribution of the molten steel among the strands, prolonged the average residence time, increased plug flow volume and decreased dead volume, and the optimum inner configuration has been considered to be the combination of turbulence inhibitor ＋ baffle ＋ dam, which contributes to obtain stable operation conditions and improve the quality of the bloom.

关 键 词：连铸 中间包 控流装置 模拟 结构优化 

分 类 号：TF777.2[冶金工程—钢铁冶金]