低碱度低氧化铝精炼渣对帘线钢夹杂物控制  

Inclusion Control of Tire Cord Steel Based on Refining Slag of Low Basicity and Low Alumina Content

作　　者：何肖飞[1] 王新华[1] 陈书浩[1] 姜敏[1] 王万军[1] 曾建华[2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]攀钢集团研究院有限公司,四川成都611731

出　　处：《钢铁》2014年第6期30-36,共7页Iron and Steel

摘　　要：研究了低碱度、低氧化铝精炼渣对帘线钢夹杂物控制情况。试验采用LD→LF,F精炼→软吹Ar→连铸工艺生产帘线钢,在碱度1.0、Al_2O_3质量分数为5%左右的精炼渣成分控制条件下,钢中酸溶铝Al_S的质量分数控制在0.000 5%左右,进而控制夹杂物中Al_2O_3质量分数在22%以内,使得帘线钢中氧化物夹杂。MnO-Al_2O_3-SiO_2类、CaOAl_2O_3-SiO_2类复合夹杂物实现了良好的塑性化控制。根据分析,在帘线钢夹杂物去除方面,软吹氩处理对钢中CaOAl_2O_3-SiO_2系复合夹杂物去除效果比对MnO-Al_2O_3.SiO_2类夹杂物更加明显;在成分控制方面,钢液中Al_S含量随着炉渣碱度、炉渣Al_2O_3质量分数的升高而升高,而夹杂物中Al_2O_3质量分数会随着钢液中Al_S含量升高而升高。The inclusion control of tire cord steel based on refining slag of low basicity and low Al2O3 content was investi- gated. The technology process of LD-LF-Soft Blow Argon-CC was used to produce tire cord steel in experiment. And when the values of the basicity and the AhO3 mass fraction of refining slag were controlled about 1.0% and 5% respective- ly, the mass percent of Als would be controlled about 0.000 5%, and then the average mass percent of Al2O3 in inclusion would be controlled less than 22%, which is beneficial to plastification of the MnO-AI203-SiO2 and CaO-Al2O3-SiO2 com- plex inclusions. According to the analysis, the removal efficiency of CaO-Al2O3-SiO3 complex inclusion is more obviously than MnO-Al2O3-SiO2 complex inclusion during the process of soft blow argon, and with the rising of mass percent of Als, which increases with the rising of basicity and mass percent of Al2O3 of slag, the mass percent of Al2O3 in inclusions increases.

关 键 词：低碱度 低氧化铝 帘线钢 夹杂物 塑性 

分 类 号：TF76[冶金工程—钢铁冶金]