提高复吹转炉透气砖寿命和冶金效果的新技术  

New technology for improving service life of multiple hole plug and metallurgical effect for combined blowing converter

作　　者：杨文远[1] 李林 彭小艳 王明林[3] 高飞 史晓强 

机构地区：[1]钢铁研究总院冶金工艺研究所,北京100081 [2]新冶高科技集团有限公司热工装备与材料事业部,北京100081 [3]钢铁研究总院连铸技术国家工程研究中心,北京100081

出　　处：《中国冶金》2017年第12期14-21,共8页China Metallurgy

摘　　要：为了提高复吹转炉透气砖寿命和冶金效果,研究了大流量透气砖底吹不对称供气技术。采用水模试验方法,底吹气量按3.3∶1分两路供气,每隔1炉交换1次。结果表明,供气强度在0.2m^3/(t·min)时,透气砖侵蚀速度与单根毛细管的气体流量呈正比。毛细管根数增加1倍,透气砖的供气能力提高1倍。采用大流量、大尺寸透气砖不对称交错供气的技术,可使透气砖的侵蚀速度减少50%,寿命提高1倍。转炉炼钢的熔池混匀时间缩短19.2%,铁水脱磷预处理熔池混匀时间缩短63%,复吹转炉的冶金效果得到明显改善。与复吹转炉预埋透气砖和更换透气砖的方法相比,可以更有效地提高转炉的复吹炉龄和冶金效果。In order to improve the service life of multiple hole plug（MHP）and the metallurgical effect for combined blowing converter,the asymmetric alternating gas supplying technology for large flow capillary MHP was investigated.For the water model experiment,the gas flow ratio of the two branches was 3.3∶1 and alternated each other heat.The results illustrated that the corrosion rate of the MHP was proportional to the gas flow of each capillary when the bottom gas supply intensity was 0.2 nm^3/（t·min）.The quantity of capillary increased 1 time,and then the gas supply ability of MHP rised 1 time.The corrosion rate of MHP can be reduced by 50%and the life of MHP can be doubled through the application of the large flow capillary MHP with big size and asymmetric alternating gas supplying technology at bottom.The mixing time of the converter molten steel bath and the hot metal dephosphorization pretreatment bath can be reduced by 19.6% and 63%,respectively,by using the asymmetric alternating gas supplying technology,therefore the metallurgical effect of the converter were improved remarkably.The asymmetric alternating gas supplying technology of large flow capillary MHP can significantly improve the combined blowing furnace campaign and metallurgical effect compared with the method of pre-embedded MHP and replacing the MHP in combined blowing converter.

关 键 词：转炉 复合吹炼 炉龄 大流量 不对称供气 

分 类 号：TF71[冶金工程—钢铁冶金]