120t复吹转炉底吹控制实践

摘要

In view of singularity issue of bottom blowing flow curve in original system , in site data were tracked and bottom blowing control modal was set up , and semi-automatic control of the bottom blowing was realized based on the modal .Oper-ation data showed that under same conditions with the optimization of bottom blowing process , the end-point carbon and ox-ygen volume reduced from 0.0029 to 0.0027, a 2.82%drop in the finish (TFe) content in slag sample, AL/Si alloy yield increased from 18.3%to 25.4%, oxygen consumption of per ton steel by 60.58 m3/t fell to 54.2 m3/t.%针对原系统中底吹流量曲线单一、恒定的问题，结合现场数据跟踪建立底吹控制模型，根据模型及时调整底吹流量，实现了底吹流量的半自动控制。数据表明，通过底吹工艺优化，同等条件下吹炼终点碳氧积[1]由0．0029降低到0．0027，终点渣样中（TFe）含量下降2．82％，Al/Si合金收得率由18．3％提高到25．4％，吨钢耗氧量由60．58 m3/t降至54．2 m3/t。