中间包通道式过滤器对硅钢W470中夹杂物的影响  

Influence of Tundish Channel Filter on Inclusions in Silicon Steel W470

作　　者：时朋召 徐李军[1] 谢桂强[2] 余小琴[3] 黄华[1] 仇圣桃[1] Shi Pengzhao;Xu Lijun;Xie Guiqiang;Yu Xiaoqin;Huang Hua;Qiu Shengtao(National Engineering Research Center for Continuous Casting Technology,Center Iron&Steel Research Institute,Beijing 100081;No.1 Steelmaking Plant of Xinyu Iron&Steel Group Co Ltd,Xinyu 338001;Technology Center of Xinyu Iron&Steel Group Co Ltd,Xinyu 338001)

机构地区：[1]钢铁研究总院国家连铸技术研究中心,北京100081 [2]新余钢铁集团有限公司第一炼钢厂,新余338001 [3]新余钢铁集团有限公司技术中心,新余338001

出　　处：《特殊钢》2021年第2期1-4,共4页Special Steel

摘　　要：利用小样电解+ASPEX扫描电镜等夹杂物检测方法,研究了使用中间包通道式过滤器前后的冲击区和浇注区的钢液以及铸坯中非金属夹杂物类型和尺寸的变化规律。结果表明,使用过滤器后,浸入式水口基本未堵塞;过滤器对夹杂物尺寸大于30μm以上的夹杂物颗粒有良好的去除效果;从夹杂物总数来看,冲击区>铸坯>浇注区,这是因为浇注区钢水夹杂物有一部分上浮和被过滤器吸附,且浇注区的Al_(2)O_(3)单位面积数量较冲击区有显著减少,说明过滤器对Al_(2)O_(3)系列夹杂去除效果较好;绝大多数夹杂物尺寸分布在10μm以下,使用过滤器后,浇注区钢水单位面积夹杂物数量较冲击区夹杂物数量减少23.3%。中间包合理工艺参数为:通钢量5.38 t/min、过滤器与长水口距离为1200 mm。The inclusion detection methods such as sample electrolysis and ASPEX scanning electron microscope were used,the change law of type and size of nonmetallic inclusions in molten steel and cast slab of impact zone and pouring zone before and after using tundish channel filter has been studied.The results show that the submerged nozzle is not blocked after using the filter;the filter has good removal effect on inclusion particles larger than 30μm.In terms of total number of inclusions,the impact zone inclusions>billet inclusions>the pouring zone inclusions,this is because the molten steel partial inclusions in pouring zone float up and absorb by the filter,and the Al_(2)O_(3) numbet of unit area in the pouring zone is significantly reduced compared with the impact zone,indicating that the filter has best removal effect on Al_(2)O_(3) series inclusions;the size distribution of most inclusions is below 10μm.After using the filter,the number of inclusions per unit area in the pouring zone is less than that in the impact zone by 23.3%.Reasonable process parameters of tundish:molten steel flow rate5.38 t/min.and distance between filter and long nozzle is 1200 mm.

关 键 词：通道式过滤器 夹杂物 冲击区 浇注区 

分 类 号：TF777[冶金工程—钢铁冶金]