低碳铝镇静钢LF精炼工艺的研究  

Study on LF refining process of low carbon aluminum killed steel

作　　者：隋亚飞[1] 周军军[1] 张丽琴 刘建华 SUI Yafei;ZHOU Junjun;ZHANG Liqin;LIU Jianhua(Technology Center,Hunan Valin Lianyuan Iron and Steel Co.,Ltd.,Loudi 417000,China;Engineering Research Institute,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]湖南华菱涟源钢铁有限公司技术中心,湖南娄底417000 [2]北京科技大学工程技术研究院,北京100083

出　　处：《炼钢》2020年第4期25-30,47,共7页Steelmaking

摘　　要：为了优化低碳铝镇静钢的LF精炼工艺,研究了LF轻处理、LF精炼(不钙处理)和LF精炼+钙处理三种模式对夹杂物、产品性能、综合成本和生产过程的影响。结果表明LF轻处理的材样中典型夹杂物是铝酸盐+MnS复合夹杂,LF造渣精炼时典型夹杂物是铝酸盐+CaS复合夹杂。不同精炼模式下材样中氧含量基本相同,力学性能没有明显差异。虽然LF轻处理模式下产品洁净度好、综合成本低,但是连铸过程中容易造成塞棒上涨与水口结瘤。因此,生产低碳铝镇静钢时应采用LF精炼(不钙处理)的模式,当生产量较少或浇次末期时,可以考虑采用LF轻处理模式。In order to optimize the LF refining process of low carbon Al-killed steel,the effects of LF light treatment,LF refining(without calcium treatment) and LF refining + calcium treatment on inclusions,product performance,cost and production process were investigated. The results show that the typical inclusions in hot coil samples with LF light treatment are aluminate + MnS composites,and the typical inclusions in hot coil samples with LF refining are aluminate + CaS composites. The oxygen content in hot coil samples are basically the same under different LF refining ways,and there is no significant difference in mechanical properties. LF light treatment leads to good cleanliness and low cost,but tends to cause stopper rising and nozzle clogging during continuous casting. It is concluded that LF refining(without calcium treatment) should be adopted in the production of low carbon Al-killed steel,and LF light treatment should be considered when the production is small or at the end of casting.

关 键 词：LF精炼 低碳铝镇静钢 夹杂物 钙处理 

分 类 号：TF769.2[冶金工程—钢铁冶金]