板坯连铸中间包气幕挡墙夹杂物去除的研究  

Study on the inclusion removal by gas curtain in slab continuous casting tundish

作　　者：刘国梁[1] 苑品[2] 季晨曦[1] 马威[3] 崔衡[2] 崔阳[1] 

机构地区：[1]首钢技术研究院,北京100043 [2]北京科技大学冶金与生态工程学院,北京100083 [3]首钢迁安钢铁有限责任公司,河北迁安064404

出　　处：《炼钢》2012年第3期57-60,69,共5页Steelmaking

摘　　要：分析了中间包不加气幕挡墙和加气幕挡墙吹氩时夹杂物上浮速度与气泡直径、夹杂物直径和密度的关系。气泡尺寸对夹杂物的上浮速度影响比较明显,夹杂物的密度对上浮速度的影响不大。进行了中间包气幕挡墙的工业试验,试验表明:中间包底吹气对钢液中小夹杂物的去除作用不明显,而对大型的夹杂物去除效果显著。The relationships among the inclusion upward float rate, diameter of argon bubbles and diameter and density of inclusion particles with or without establishment of the gas curtain in the tundish in the process of argon bubbling are analyzed. The results show that the influence of the diameter of the gas bubbles on the upward float rate of the inclusions is apparent, whereas the effect of density of the inclusions on the float rate is of little significance. Results of industrial experiments show that tundish bottom gas bubbling is very useful for large size inclusion removal in the liquid steel, but it＇s not so apparent for removal of the medium and small size inclusions.

关 键 词：中间包 气幕挡墙 气泡 夹杂物 

分 类 号：TF777[冶金工程—钢铁冶金]