长江钢铁3号高炉炉缸炭砖损毁机理解析  

Analysis on Refractory Erosion of No.3 BF Hearth and Bottom in Changjiang Steel

作　　者：许实友 陆飞 赵金龙 孟庆民 祖一峰 王平 XU Shiyou;LU Fei;ZHAO Jinlong;MENG Qingmin;ZU Yifeng;WANG Ping(Changjiang Iron and Steel Co.,Ltd.,Ma'anshan 243181,Anhui,China;School of Metallurgical Engineering,Anhui University of Technology,Ma'anshan 243032,Anhui,China)

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

出　　处：《炼铁》2024年第6期40-45,共6页Ironmaking

基　　金：国家自然科学基金资助项目(51774005)。

摘　　要：长江钢铁3号高炉一代炉龄近9年,单位炉容产铁量10565.65t/m^(3)。停炉后,对炉缸进行了破损调查,通过对残存炭砖的理化性能及微观结构进行分析,深入解析炉缸炭砖的损毁机理。结果表明:炉缸整体呈“象脚状”侵蚀;风口组合砖下的16~13层炭砖残存率超过90%以上,12~7层炭砖残存率呈现逐渐递减趋势,侵蚀相对严重位置主要在铁口区域附近,最薄处位于8层,炭砖残存厚度520~530mm;除机械磨损、氧化、渣铁侵蚀和热应力等因素外,导致3号高炉炉缸炭砖损毁的主要原因是以K、Na为代表的碱金属和Zn在高炉内的循环富集。The one generation campaign of Changjiang Steel No.3 BF lasts nearly 9 years and the furnace productivity is 10565.65 t/m^(3).With the furnace blown down,an investigation is carried out on the hearth refractory erosion condition,and an analysis is made on the physical and chemical property and microstructure of the residual carbon bricks so as to figure out the erosion mechanism of the hearth carbon brick.The results suggest that the erosion of the hearth carbon brick is of"elephant foot-like",the residual rate of the carbon bricks of layer 16 to 13 below the tuyere composite brick is over 90%,and that of layer 12 to 7 deteriorates gradually.The serious erosion part is found near the taphole area mainly with the thinnest refractory area appears at layer 8,of which the residual carbon brick is just 520-530 mm thick.In addition to the erosion caused by mechanical wear,oxidation,hot metal,slag and thermal stress,the erosion mainly comes from cyclic enrichment of basic metals and Zn in the furnace,represented by K and Na.

关 键 词：高炉 炉缸 炭砖 碱金属 氧化锌 

分 类 号：TF5[冶金工程—钢铁冶金]