控流装置对四流中间包钢水洁净度的影响  

Effect of flow control device on steel cleanliness in four-flow tundish

作　　者：刘喜锚 LIU Xi-mao(Steelmaking Plant,Hunan Valin Xiangtan Iron and Steel Co.,Ltd.,Xiangtan 411101,Hunan,China)

机构地区：[1]湖南华菱湘潭钢铁有限公司炼钢厂,湖南湘潭411101

出　　处：《连铸》2022年第5期88-94,共7页Continuous Casting

摘　　要：为了研究控流装置对中间包钢水洁净度的影响,采用数值模拟和工业试验验证结合的方法对钢厂方坯连铸中间包进行优化。通过在原型中间包基础上增加U型挡墙,使得响应时间增加5 s,峰值时间增加371 s,改善了钢液在中间包内的短路流现象;平均停留时间增加53 s,死区体积分数减小4.1%,活塞区体积分数增加17.3%,改善了夹杂物上浮的条件;各流一致性水平也得到了提高。工业试验结果表明,在受钢区与浇注区之间增加U型挡墙,使得中间包钢液中夹杂物去除率增加了29.05%,中间包各个区域夹杂物最大尺寸最大可减小26μm,铸坯上夹杂物去除率增加38.42%,铸坯上夹杂物最大尺寸降至16μm以下。在中间包中使用U型挡墙,提高了钢水的洁净度以及铸坯实物的质量。In order to study the influence of flow control device on the water cleanliness of steel tundish,the method of numerical simulation and industrial test verification was used to optimize the billet continuous casting tundish.The response time was increased by 5 s and the peak time was increased by 371 s by adding a U-shaped retaining wall to the prototype tundie,which improved the short-circuit flow phenomenon of molten steel in the tundie,and the average residence time increases by 53 s,the dead zone volume fraction decreases by 4.1%,and the piston zone volume fraction increases by 17.3%,which improves the floating condition of inclusions.The consistency level of each flow is also improved.The results of industrial tests show that the inclusion removal rate of molten steel in the tundie increases by 29.05%when the U-shaped retaining wall is added between the receiving zone and the pouring zone,the maximum size of inclusion in each zone of the tundie decreases by 26μm,the inclusion removal rate on the billet increases by 38.42%,and the maximum size of inclusion on the billet decreases to less than 16μm.The use of U-shaped retaining wall in tundish improves the cleanliness of molten steel and the quality of billet.

关 键 词：中间包 U型挡墙 数值模拟 工业试验 洁净度 

分 类 号：TF777[冶金工程—钢铁冶金]