长江钢铁3号高炉铸钢及铸铁冷却壁的破损行为研究  

Investigation on Damage Behavior of Cast Iron and Steel Cooling Staves of Changjiang Steel No.3 BF

作　　者：陆飞 覃德波 赵金龙 王宏涛 孟庆民 祖一峰 王平 LU Fei;QIN Debo;ZHAO Jinlong;WANG Hongtao;MENG Qingmin;ZU Yifeng;WANG Ping(School of Metallurgical Engineering,Anhui University of Technology,Ma'anshan 243002,Anhui,China;Changjiang Iron and Steel Co.,Ltd.,Ma'anshan 243181,Anhui,China)

机构地区：[1]安徽工业大学冶金工程学院,安徽马鞍山243032 [2]安徽长江钢铁股份有限公司,安徽马鞍山243181

出　　处：《炼铁》2024年第5期22-27,32,共7页Ironmaking

基　　金：国家自然科学基金资助项目(51774005)。

摘　　要：对长江钢铁3号高炉一代炉役后铸钢及铸铁冷却壁的破损行为进行了研究。结果表明:①冷却壁燕尾槽镶砖大部分已脱落,9段铸钢冷却壁和11段铸铁冷却壁的燕尾槽凸台平均磨损率分别为46.56%和73.3%;②铸钢冷却壁裂纹从热面向下延伸至60mm处,而铸铁冷却壁裂纹则延伸至冷却水管上方;③铸钢及铸铁冷却壁水管内均存在铁氧化物水垢;④铸钢冷却壁水管与壁体结合紧密无缝隙,而铸铁冷却壁水管与壁体边界清楚,有缝隙,最大处达到0.92mm。认为3号高炉冷却壁破损的原因,主要是煤气流冲刷和炉料摩擦,壁体因热震导致的横向裂纹和纵向裂纹,以及水管与壁体间的缝隙和水垢引起的传热不畅等。An investigation is carried out on damage behavior of cast iron and cast steel cooling staves of Changjiang Steel No.3 BF after its one generation campaign,and it is found that:(1)most of the inserted bricks in dovetail groove of the cooling staves falls and the average volume abrasion ratio of thedovetail groove ledgesof the cast steel cooling stave in section 9 and the cast iron cooling stave in section 11 are 46.56%and 73.3%,respectively;(2)the cracks inside the cast steel cooling stave extend inward by 60mm from the furnace hot side,while the crack inside the cast iron cooling stave extends outward o-ver the cooling water pipe;(3)iron oxide scaling is formed in the water pipes of cast steel and cast iron cooling stave;(4)there is no gap between the water pipes of the cast steel cooling stave and the stave body,but the gap exists between the water pipes of the cast iron cooling stave and the stave body,and it is as wide as O.92mm max.It is believed that the dam-age of cooling staves of No.3 BF is caused by erosion of gas flow and the friction of stocks,the transversal and longitudinal penetration cracks of the stave body resulted from thermal shock,poor heat transfer of stave body caused by the gap between the water pipe and the stave body,and the scaling in the cooling water pipe.

关 键 词：高炉 铸钢冷却壁 铸铁冷却壁 破损行为 壁体解剖 

分 类 号：TF57[冶金工程—钢铁冶金]