BOF→RH→CC流程冶炼SPHC钢的工艺优化  

Steelmaking process optimization of SPHC steel produced by BOF→RH→CC

作　　者：邓叙燕 苏笃星 周彦召 马建超 

机构地区：[1]江苏省(沙钢)钢铁研究院,江苏张家港215625

出　　处：《炼钢》2014年第5期26-29,56,共5页Steelmaking

摘　　要：针对SPHC钢冶炼过程中钢液磷含量超标、可浇性差的问题,通过热力学计算和生产数据分析研究了转炉出钢温度、出钢碳含量对钢液中磷含量的影响,及钢包渣的氧化性和RH操作过程对钢液洁净度的影响。在采取降低转炉出钢温度和出钢碳含量、加入炉渣改质剂、增大出钢口的内径、优化RH脱氧制度等改善措施后,转炉平均出钢时间缩短了0.9 min,出钢平均温降减小了15℃;转炉终点磷含量的达标率从87.1%提高到94.3%;RH工位吹氧升温的比例从30.2%降低到14.3%;单中间包的连浇炉数从4炉提高到8炉以上。To resolve the issues that phosphorus content in steel was over the upper limits, and the castability of liquid steel was poor, the influence of tapping temperature and tapping carbon content on phosphorus content in steel was investigated, the effect of ladle slag and RH operation on steel cleanliness was also investigated through thermodynamic calculation and production data analysis. After the optimized measures were taken, which included tapping temperature and carbon content decreased, slag modification agent added, tapping hole enlarged, RH deoxidation schema improved, BOF tapping time shortened by 0. 9 min, the temperature drop during BOF tapping decreased by 15 ℃, the target ratio of phosphorus at BOF end increased from 87. 1% to 94. 3 %, the ratio of oxygen-blowing at RH station decreased from 30. 2 0% to 14. 3%, and the continuously casting heat increased from 4 heats to above 8 heats in a single tundish.

关 键 词：SPHC钢 脱磷 钢液可浇性 夹杂物 

分 类 号：TF703[冶金工程—钢铁冶金]