降低LF精炼电耗研究  

Study on Reducing Power Consumption of LF Refining

作　　者：胡井涛[1] 魏军[1] 刘善喜[1] 魏国增[1] 李占清[1] 

机构地区：[1]河北钢铁股份有限公司唐山分公司第二钢轧厂,河北唐山063016

出　　处：《钢铁》2014年第3期78-82,共5页Iron and Steel

摘　　要：通过理论计算得出电能利用率与升温速度无关,确定使用3档起弧精炼时需控制LF渣厚大于50mm;当渣厚小于50mm时,选择4档起弧加热更有效节约电能;不允许以升温为目的使用2,5档。通过现场实践和理论相结合得出LF旁通条件下温降随初始温度升高而增大,指出提高成分微调一次命中率有助于降低渣面散热。根据生产实际工艺条件,提出了降低电耗的有效措施,即缩短精炼周期、降低非周转钢包使用率、优化氩气底吹率,并确定了各钢种进站温度和成分。通过以上优化措施,LF炉吨钢电耗降低了6.8(kW·h)/t。Based on the theoretical calculation, it is concluded that the power utilization ratio has nothing to do with the temperature rise speed; and the slag thickness should be larger than 50ram when gear 3 is used to refine. When the slag is thinner than 50mm, gear 4 is more effective to save power. Besides, gear 2 and gear 5 are not suggested for the purpose of temperature promotion only. According to real practice and theoretical calculation, it is found that when the bypass blowing is applied, the temperature drop is enhanced with the increase of initial temperature, and the heat dissipation of slag surface is reduced through improving the hit ratio of element adjustment at first time. On the basis of the practical process, the methods of reducing power consumption consisting of shortening the refining time, decreasing the utilization rate of non-turnover ladles and optimizing argon bottom blowing are also suggested, meanwhile compositions and temperatures of molten steel for different steel grades as they get in LF station are de- termined. According to these methods, the power consumption of LF was reduced by 6.8（kW.h）/t in present study.

关 键 词：LF炉 降耗 优化档位 工艺优化 

分 类 号：TF769[冶金工程—钢铁冶金]