京唐1号高炉风口熔损机理解析  

Analysis on the Melting Loss Mechanism of Jingtang Steel No.1 BF Tuyere

作　　者：黄俊杰[1] 王炜[2] 武建龙[1] 黄涛 陈柏文 陈世锦 HUANG Junjie;WANG Wei;WU Jianlong;HUANG Tao;CHEN Bowen;CHEN Shijin(Shougang Jingtang United Iron&Steel Co.,Ltd.,Tangshan 063200,Hebei,China;School of Materials and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China)

机构地区：[1]首钢京唐钢铁联合有限责任公司,河北唐山063200 [2]武汉科技大学材料与冶金学院,湖北武汉430081

出　　处：《炼铁》2023年第4期15-18,共4页Ironmaking

摘　　要：对京唐1号高炉下线风口的不同熔损部位进行取样分析,重点探讨了风口熔损机理。利用光学显微镜对风口熔坑进行了三维形貌重建,发现风口表面的熔损区面积大,深度深,表明熔损对风口具有巨大的破坏作用。通过对下线风口铜的导电导热性能测试和金相分析,以及对风口熔损区进行微观分析,揭示了风口熔损机理,即:使用后的风口导热性变差,熔损部位的铜晶粒粗大且不均匀,在冷却不足前提下,风口表面受到热冲击形成导热性更差的铜-铁合金,并与渣铁不断黏结,铜-铁结合处熔化脱落时,造成铜的损失同时暴露出内部的新铜,如此往复直至风口熔穿。Different parts of the dismounted tuyere from Shougang Jingtang No.1 BF which suffer melting loss are sampled and analyzed,followed by a study on the melting loss mechanism.A 3D morphology of melting crater is reconstructed under the optical microscope and it exhibits a large and deep melting loss portion on the tuyere surface,demonstrating that the melting loss imposes a huge destructive effect on the tuyere,and the melting loss mechanism of the tuyere is revealed through an elec-tro conductivity and thermo conductivity test,a metallographic analysis of the tuyere copper part,and a microscopic analysis of the melting loss area,that is:the thermo conductivity of the used tuyere deteriorates and the copper grain in the melting loss portion becomes coarse and uneven;if cooling is insufficient,the tuyere suffers thermal shock,and a copper-iron alloy with worse thermo conductivity will be formed on its surface,which will bind with hot metal and slag;when the copper-iron binding part melts off,copper loss will occur and the internal copper will expose;this situation goes round and round until the tuyere is molten through.

关 键 词：特大型高炉 风口 熔损 导热性 铜晶粒 铜-铁合金 

分 类 号：TF54[冶金工程—钢铁冶金]