工程科学学报，第37卷，第6期：700-705,2015年6月 Chinese Journal of Engineering,Vol.37,No.6:700-705,June 2015 D0l:10.13374/j.issn2095-9389.2015.06.004:http://journals.ustb.edu.cn 铝耗及终脱氧氧位对F钢水口结瘤的影响 李翔，包燕平区，王敏，林路 北京科技大学钢铁治金新技术国家重点实验室，北京100083 ☒通信作者，Email:baoyp@usth.cd.cn 摘要通过对F钢水口结瘤物各层成分及形貌的分析，得出造成水口结瘤的主要原因是AL,O,夹杂物在水口内壁不断聚 集和烧结.比较了不同铝耗对塞棒杆位的影响，铝耗较高时，塞棒杆位明显上涨，当铝耗超过3.5kg1时，可能导致钢水断 浇等生产事故.对平均铝耗及平均终脱氧氧位作了定义，随着平均铝耗的增加，单支下水口浇铸时间呈下降趋势，当平均铝 耗超过3.5kgt时，单支下水口浇铸时间低于50mi.铝耗随终脱氧氧位提高呈增加趋势，当终脱氧氧位在600×10-6以上 时，铝耗可能超过3.0kgt1:而平均终脱氧氧位超过600×106时，单支下水口浇铸时间可能低于50mi. 关键词浇铸：水口：结瘤：影响因素：氧化铝夹杂物 分类号TF775 Effect of aluminum consumption and oxygen potential at final deoxidation on nozzle clogging of IF steel LI Xiang,BAO Yan-ping≌，WANG Min,LIN Lu State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:baoyp@ustb.edu.cn ABSTRACT By analyzing the composition and morphology of each layer IF steel clogs on the nozzle,it is found that aggregation and sintering of AlO inclusions is the main reason for nozzle clogging.The effects of different aluminum consumptions on the stopper pole position were compared.When the quantity of aluminum consumption is large,the stopper pole position rises significantly.It may cause the casting accident of molten steel breakout while the quantity of aluminum consumption is more than 3.5kgt.The average aluminum consumption and average oxygen potential at final deoxidation were defined.As the average aluminum consumption increa- ses,the casting time decreases when a single submerged nozzle is used.When the quantity of average aluminum consumption is over 3.5kgt,the casting time is less than 50 min with a single submerged nozzle used.The aluminum consumption tends to increase with the improvement of oxygen potential at final deoxidation.When the oxygen potential at final deoxidation is more than 60010, the aluminum consumption may exceed 3.0kgt.While the average oxygen potential at final deoxidation is more than 600x10, the casting time with a single submerged nozzle is probably less than 50 min. KEY WORDS casting:nozzles:clogging:influencing factors:alumina inclusions 汽车面板用F钢是超低碳铝镇静钢，其治炼工艺 映了A山203夹杂物的生成总量，无论采用何种精炼手 路线一般是BOF一RH一CC.在治炼过程中，钢水中会 段都不可能完全去除钢中夹杂物.终脱氧氧位是指 加入大量的铝元素来脱氧，而其脱氧产物AL,0,不仅 H循环脱碳结束后钢水中残氧的含量，由于终脱氧 是钢中夹杂物的主要组成部分，更是造成浇铸过程中 后钢水经过弱吹氩或纯循环即上连铸机浇铸，相对之 水口结瘤的主要原因习.铝元素的加入量即铝耗反 前脱氧形成的夹杂物，其上浮时间更短，在钢液中的残 收稿日期：2014-02-28 基金项目：中国博士后科学基金资助项目(2014M560890)工程科学学报，第 37 卷，第 6 期:700--705，2015 年 6 月 Chinese Journal of Engineering，Vol． 37，No． 6: 700--705，June 2015 DOI: 10． 13374 /j． issn2095--9389． 2015． 06． 004; http: / /journals． ustb． edu． cn 铝耗及终脱氧氧位对 IF 钢水口结瘤的影响 李 翔，包燕平，王 敏，林 路 北京科技大学钢铁冶金新技术国家重点实验室，北京 100083  通信作者，E-mail: baoyp@ ustb． edu． cn 摘 要 通过对 IF 钢水口结瘤物各层成分及形貌的分析，得出造成水口结瘤的主要原因是 Al2O3夹杂物在水口内壁不断聚 集和烧结． 比较了不同铝耗对塞棒杆位的影响，铝耗较高时，塞棒杆位明显上涨，当铝耗超过 3. 5 kg·t － 1 时，可能导致钢水断 浇等生产事故． 对平均铝耗及平均终脱氧氧位作了定义，随着平均铝耗的增加，单支下水口浇铸时间呈下降趋势，当平均铝 耗超过 3. 5 kg·t － 1 时，单支下水口浇铸时间低于 50 min． 铝耗随终脱氧氧位提高呈增加趋势，当终脱氧氧位在 600 × 10 － 6 以上 时，铝耗可能超过 3. 0 kg·t － 1 ;而平均终脱氧氧位超过 600 × 10 － 6 时，单支下水口浇铸时间可能低于 50 min． 关键词 浇铸; 水口; 结瘤; 影响因素; 氧化铝夹杂物 分类号 TF775 Effect of aluminum consumption and oxygen potential at final deoxidation on nozzle clogging of IF steel LI Xiang，BAO Yan-ping ，WANG Min，LIN Lu State Key Laboratory of Advanced Metallurgy，University of Science and Technology Beijing，Beijing 100083，China  Corresponding author，E-mail: baoyp@ ustb． edu． cn ABSTRACT By analyzing the composition and morphology of each layer IF steel clogs on the nozzle，it is found that aggregation and sintering of Al2O3 inclusions is the main reason for nozzle clogging． The effects of different aluminum consumptions on the stopper pole position were compared． When the quantity of aluminum consumption is large，the stopper pole position rises significantly． It may cause the casting accident of molten steel breakout while the quantity of aluminum consumption is more than 3. 5 kg·t － 1 ． The average aluminum consumption and average oxygen potential at final deoxidation were defined． As the average aluminum consumption increa￾ses，the casting time decreases when a single submerged nozzle is used． When the quantity of average aluminum consumption is over 3. 5 kg·t － 1 ，the casting time is less than 50 min with a single submerged nozzle used． The aluminum consumption tends to increase with the improvement of oxygen potential at final deoxidation． When the oxygen potential at final deoxidation is more than 600 × 10 － 6 ， the aluminum consumption may exceed 3. 0 kg·t － 1 ． While the average oxygen potential at final deoxidation is more than 600 × 10 － 6 ， the casting time with a single submerged nozzle is probably less than 50 min． KEY WORDS casting; nozzles; clogging; influencing factors; alumina inclusions 收稿日期: 2014--02--28 基金项目: 中国博士后科学基金资助项目(2014M560890) 汽车面板用 IF 钢是超低碳铝镇静钢，其冶炼工艺 路线一般是 BOF—RH—CC． 在冶炼过程中，钢水中会 加入大量的铝元素来脱氧，而其脱氧产物 Al2 O3 不仅 是钢中夹杂物的主要组成部分，更是造成浇铸过程中 水口结瘤的主要原因［1 － 5］． 铝元素的加入量即铝耗反 映了 Al2O3夹杂物的生成总量，无论采用何种精炼手 段都不可能完全去除钢中夹杂物． 终脱氧氧位是指 RH 循环脱碳结束后钢水中残氧的含量，由于终脱氧 后钢水经过弱吹氩或纯循环即上连铸机浇铸，相对之 前脱氧形成的夹杂物，其上浮时间更短，在钢液中的残