气幕挡墙中间包夹杂物去除的水模型研究  

A Study on Water Modeling of Inclusion Removal in Tundish with Gas Curtain

作　　者：黄奥[1] 汪厚植[1] 顾华志[1] 张美杰[1] 陶晓林[2] 胡铁山[2] 

机构地区：[1]武汉科技大学湖北省耐火材料与高温陶瓷重点实验室,武汉430081 [2]武汉钢铁股份有限公司炼钢总厂三分厂,武汉430082

出　　处：《特殊钢》2009年第1期7-9,共3页Special Steel

基　　金：国家科技攻关计划资助项目(2005BA325C)

摘　　要：以连铸1500mm×250mm板坯的中间包为原型,几何相似比1/3,采用自制多孔透气砖进行中间包底吹气的水模型试验。结果表明,气幕挡墙中间包中,夹杂物通过斯托克斯机理上浮,气泡吸附和钢液上扬流动而上浮去除;当吹气量≥0.08m^3/h,距入口中心533～800mm处形成有效的气幕挡墙,显著改善钢液流动性,夹杂物去除率由不吹气的44.86%增加至72.86%,并改善小颗粒夹杂物的去除。工业试验表明,采用气幕挡墙,使T[O]降低12%以上。With prototype of tundish for concasting slab 1 500 mm × 250 mm and using geometric similar ratio 1/3, the water modeling test of tundish bottom gas blowing has been carried out by self-made porous plug. Results showed that in tundish with gas curtain the inclusion removed by mechanisms of Stokes floating, absorption on bubble and action of liquid flowing up; as gas blowing rate ≥0. 08 m3/h the available gas curtain formed at the distance 533 -800 mm from inlet center to obviously improve liquid flow characteristic, the inclusion removal ratio increased to 72. 86% from original 44. 86% without gas curtain and the removal of small size inclusion markedly improved. Commercial pilot production showed that with using gas curtain the T[O] decreased by more than 12%.

关 键 词：中间包 气幕墙 夹杂物去除 水模型试验 

分 类 号：TF777[冶金工程—钢铁冶金]