摘要
为提高硅钢生产控硫水平,在理论分析的基础上,结合大数据分析对某厂硅钢冶炼全工序硫含量变化规律进行了研究。结果表明,随着预处理前温度的升高,处理后的铁水中硫含量呈先下降再上升的趋势,处理前的最佳温度为1 370~1 400℃。铁水通过3次扒渣、2次搅拌处理,硫质量分数由220.5×10-6降至11.7×10-6。硅钢生产选择专用转炉经洗炉、控制低碳氧积、减少废钢用量、增加石灰用量、控制终点氧质量分数为400×10-6~500×10-6,使得转炉终点硫质量分数降至21.2×10-6,精炼出站硫质量分数降至14.0×10-6。通过全流程控制,实现了高牌号W310-W400钢精炼出站硫质量分数小于20×10-6的比例提升至94.2%,高牌号W250-W290钢精炼出站硫质量分数小于15×10-6的比例提升至90.7%。
To improve the sulfur control level of silicon steel production, on the basis of theoretical analysis, the variation law of sulfur content in the whole process of silicon steel smelting in a factory was studied combined with big data analysis. The results show that sulfur content of molten iron after treatment decreases first and then increases with the increase of temperature before pretreatment, and the optimum temperature before pretreatment is 1 370-1 400 ℃. The sulfur mass fraction of molten metal is reduced from 220.5×10-6to 11.7×10-6by three times slag skimming and two times stirring. In the production of silicon steel, the special converter is selected to wash the furnace, the low carbon oxygen accumulation is controlled, the amount of scrap steel is reduced, the amount of lime is increased, and the end point oxygen mass fraction is controlled at 400×10-6-500×10-6, then the end point sulfur mass fraction of converter is reduced to 21.2×10-6, and the end point sulfur mass fraction of refining is reduced to 14.0×10-6. Through the whole process control, the proportion of high grade W310-W400 steel with sulfur mass fraction less than 20×10-6at refining outlet increases to 94.2%, and the proportion of high grade W250-W290 steel with sulfur mass fraction less than 15×10-6at refining outlet increases to 90.7%.
作者
邱在军
QIU Zai-jun(No.4 Steelmaking and Rolling General Plant,Masteel,Maanshan 243000,Anhui,China)
出处
《中国冶金》
CAS
CSCD
北大核心
2023年第3期124-131,共8页
China Metallurgy
关键词
硅钢
硫含量
铁水预处理
转炉
精炼
silicon steel
sulfur content
hot metal pretreatment
converter
refining
