武钢1号高炉热风围管耐火材料破损原因分析  

Cause analysis on damage of refractories used in encirclement wind pipe in No.1 blast furnace of WISCO

作　　者：徐国涛[1] 向武国[2] 黄新豪[3] 张洪雷[1] 刘黎[1] 

机构地区：[1]武汉钢铁(集团)公司研究院,湖北武汉430080 [2]武汉钢铁股份有限公司炼铁厂,湖北武汉430083 [3]武汉钢铁股份有限公司设备部,湖北武汉430083

出　　处：《钢铁研究》2016年第4期38-40,47,共4页Research on Iron and Steel

摘　　要：对武钢1号高炉中修过程中围管的破损状况进行了调研分析。结果表明:围管砖的侵蚀与高炉内锌、镁及碱金属的蒸发有关,碱金属可以深入到砖的基质中形成钠钾的铝硅酸盐相,当碱金属量达到一定的量时,基质熔点低于送风温度就会造成基质熔融,而砖中氧化铝形成孤立的脱熔相。锌、镁和砖的基质形成反应层,破坏了原砖的组成结构,形成低熔物。风口附近的物相分析也表明:锌及碱金属大量富集在风口二套周围的炉料中,其排出高炉需要风量和温度等操作工艺的调节。The damage situation of encirclement wind pipe in the process of middle maintenance in No. 1blast furnace of WISCO was investigated and analyzed. The results showed that the erosion of refractory bricks in encircle pipe was mainly related to the vapor volatilization of zinc,magnesium and alkali metal in blast furnace. Alkali metals could penetrate into the matrix of the bricks and form the phase of aluminosilicate which contained sodium and potassium. What ＇s more,when the content of alkali metals reached to a certain amount,the melting point of matrix phase would be lower than the air temperature and cause the matrix to melt. The alumina in the bricks would take off and form phases independently. Zinc,magnesium and matrix formed a reaction layer which destroyed the structure of the original composition,and led to a low melting point material. The analysis of the phase near the air entrance also reflected that,a lot of zinc and alkali metals enriched around the outlet of second set air-entrance,and exhausting of zinc and alkali metals from blast furnace needed the regulation of air volume and temperature of operating and other technology measures.

关 键 词：高炉 热风炉 围管 耐火材料 破损 

分 类 号：TQ175[化学工程—硅酸盐工业]