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工程科学学报,第38卷,第12期:1702-1710,2016年12月 Chinese Journal of Engineering,Vol.38,No.12:1702-1710,December 2016 D0l:10.13374/j.issn2095-9389.2016.12.007:http://journals.ustb.edu.cn 超低碳钢顶渣氧化性对钢液洁净度的影响 苑 鹏区,李海波”,罗衍昭”,刘道正》,陈建光》,王强强》,宋丽娜 1)首钢集团总公司技术研究院薄板研究所,北京1000432)首钢股份公司迁安钢铁公司,迁安064404 3)河南济源钢铁(集团)有限公司,济源4546504)钢铁研究总院科技信息与战略研究所,北京100081 ☒通信作者,E-mail:shandongyuanpeng@163.com 摘要为探究降低顶渣氧化性对改善超低碳钢钢液洁净度的影响,在转炉终点至中间包过程中,在多位置取炉渣和钢水试 样,分别进行炉渣氧化性、钢液成分和夹杂物分析.实验结果表明:转炉出钢后通过对顶渣改质,渣中T.F由转炉终点的 19.18%降至H进站时的4.68%,顶渣氧化性降低明显.渣中T.Fe降低导致钢中[O]的降低,T.Fe较低的炉次平均吹氧量 较大,使得铝脱氧前钢中[O较高.RH结束渣T.Fe与夹杂物数量呈线性关系,T.Fε越低夹杂物数量越少,同时RH结束后 夹杂物数量与铝脱氧前钢中[O]无必然关系.顶渣(CaO)/(AL,0,)会影响其吸收AL,0,夹杂物的能力,(C0)/(Al,0,)控制 不合理的炉次,其夹杂物数量也较多.通过降低顶渣氧化性,热轧板卷缺陷率得到明显降低 关键词炼钢:低碳钢;渣:氧化性:夹杂物;洁净度:表面缺陷 分类号TF769.4 Influence of ladle slag oxidability on the cleanliness of ultra low carbon steel YUAN Peng,LI Hai-bo,LUO Yan-zhao,LIU Dao-zheng?,CHEN Jian-guang?,WANG Qiang-qiang,SONG Li-na 1)Sheet Metal Research Institute,Shougang Research Institute of Technology,Beijing 100043,China 2)Shougang Qian'an Steel Company,Qian'an (64404,China 3)Henan Jiyuan Iron Steel (Group)Co.Ltd.,Jiyuan 454650,China 4)Institute for Science and Technology Information and Strategy,Central Iron and Steel Research Institute,Beijing 100081,China Corresponding author,E-mail:shandongyuanpeng@163.com ABSTRACT Slag oxidability,steel composition and inclusions were analyzed by slag sampling and steel sampling from the BOF endpoint to the tundish for studying the influence of ladle slag oxidability on the cleanliness of ultra low carbon steel.The results show that by ladle slag treatment after BOF tapping,T.Fe content in top slag decreases from 19.18%to 4.68%when getting in RH,indi- cating that the reduction of slag oxidability is obvious.The reduction of T.Fe content in slag leads to the reduction of [O]content in steel.For some heats with low T.Fe content,the average oxygen-blowing amount is large,and then the [o]content before Al deoxi- dization is relatively high.The relationship between the T.Fe content of RH end slag and the number of inclusions is linear,but mean- while there is no obvious relationship between the number of inclusions after RH and the [O]content before Al deoxidization.The (CaO)/(Al,O)ratio of ladle slag influences the Al,O,absorption ability.The number of inclusions will be large if the (CaO)/ (Al,O,)ratio of the slag is not reasonable.The defects of hot rolled sheets significantly decline with the reduction of slag oxidability. KEY WORDS steelmaking:low carbon steel;slag:oxidability:inclusions:cleanliness:surface defects 超低碳F钢广泛用于汽车面板的生产,为达到卓夹杂物尺寸较大,因此危害也较大2-.保护渣夹杂物 越的表面质量,对其钢中洁净度的要求较高四.保护 源自结晶器中保护渣的卷入,通过对结晶器流场进行 渣夹杂物和内生的大尺寸簇群状氧化铝夹杂物是造成 优化可有效降低保护渣卷入的概率.国内外学者对结 此类深冲冷轧薄板表面缺陷的主要原因,其中保护渣 晶器内流场优化进行了大量研究,现阶段通过优化连 收稿日期:201609-22工程科学学报,第 38 卷,第 12 期: 1702--1710,2016 年 12 月 Chinese Journal of Engineering,Vol. 38,No. 12: 1702--1710,December 2016 DOI: 10. 13374 /j. issn2095--9389. 2016. 12. 007; http: / /journals. ustb. edu. cn 超低碳钢顶渣氧化性对钢液洁净度的影响 苑 鹏1) ,李海波1) ,罗衍昭1) ,刘道正2) ,陈建光2) ,王强强3) ,宋丽娜4) 1) 首钢集团总公司技术研究院薄板研究所,北京 100043 2) 首钢股份公司迁安钢铁公司,迁安 064404 3) 河南济源钢铁( 集团) 有限公司,济源 454650 4) 钢铁研究总院科技信息与战略研究所,北京 100081  通信作者,E-mail: shandongyuanpeng@ 163. com 摘 要 为探究降低顶渣氧化性对改善超低碳钢钢液洁净度的影响,在转炉终点至中间包过程中,在多位置取炉渣和钢水试 样,分别进行炉渣氧化性、钢液成分和夹杂物分析. 实验结果表明: 转炉出钢后通过对顶渣改质,渣中 T. Fe 由转炉终点的 19. 18% 降至 RH 进站时的 4. 68% ,顶渣氧化性降低明显. 渣中 T. Fe 降低导致钢中[O]的降低,T. Fe 较低的炉次平均吹氧量 较大,使得铝脱氧前钢中[O]较高. RH 结束渣 T. Fe 与夹杂物数量呈线性关系,T. Fe 越低夹杂物数量越少,同时 RH 结束后 夹杂物数量与铝脱氧前钢中[O]无必然关系. 顶渣( CaO) /( Al2O3 ) 会影响其吸收 Al2O3 夹杂物的能力,( CaO) /( Al2O3 ) 控制 不合理的炉次,其夹杂物数量也较多. 通过降低顶渣氧化性,热轧板卷缺陷率得到明显降低. 关键词 炼钢; 低碳钢; 渣; 氧化性; 夹杂物; 洁净度; 表面缺陷 分类号 TF769. 4 Influence of ladle slag oxidability on the cleanliness of ultra low carbon steel YUAN Peng1)  ,LI Hai-bo 1) ,LUO Yan-zhao 1) ,LIU Dao-zheng2) ,CHEN Jian-guang2) ,WANG Qiang-qiang3) ,SONG Li-na4) 1) Sheet Metal Research Institute,Shougang Research Institute of Technology,Beijing 100043,China 2) Shougang Qian’an Steel Company,Qian’an 064404,China 3) Henan Jiyuan Iron & Steel ( Group) Co. Ltd. ,Jiyuan 454650,China 4) Institute for Science and Technology Information and Strategy,Central Iron and Steel Research Institute,Beijing 100081,China  Corresponding author,E-mail: shandongyuanpeng@ 163. com ABSTRACT Slag oxidability,steel composition and inclusions were analyzed by slag sampling and steel sampling from the BOF endpoint to the tundish for studying the influence of ladle slag oxidability on the cleanliness of ultra low carbon steel. The results show that by ladle slag treatment after BOF tapping,T. Fe content in top slag decreases from 19. 18% to 4. 68% when getting in RH,indi￾cating that the reduction of slag oxidability is obvious. The reduction of T. Fe content in slag leads to the reduction of [O]content in steel. For some heats with low T. Fe content,the average oxygen-blowing amount is large,and then the [O]content before Al deoxi￾dization is relatively high. The relationship between the T. Fe content of RH end slag and the number of inclusions is linear,but mean￾while there is no obvious relationship between the number of inclusions after RH and the [O]content before Al deoxidization. The ( CaO) /( Al2O3 ) ratio of ladle slag influences the Al2O3 absorption ability. The number of inclusions will be large if the ( CaO) / ( Al2O3 ) ratio of the slag is not reasonable. The defects of hot rolled sheets significantly decline with the reduction of slag oxidability. KEY WORDS steelmaking; low carbon steel; slag; oxidability; inclusions; cleanliness; surface defects 收稿日期: 2016--09--22 超低碳 IF 钢广泛用于汽车面板的生产,为达到卓 越的表面质量,对其钢中洁净度的要求较高[1]. 保护 渣夹杂物和内生的大尺寸簇群状氧化铝夹杂物是造成 此类深冲冷轧薄板表面缺陷的主要原因,其中保护渣 夹杂物尺寸较大,因此危害也较大[2--3]. 保护渣夹杂物 源自结晶器中保护渣的卷入,通过对结晶器流场进行 优化可有效降低保护渣卷入的概率. 国内外学者对结 晶器内流场优化进行了大量研究,现阶段通过优化连
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