沙钢5800m^(3)高炉渣皮脱落的影响因素探析  

Analysis on the Influencing Factors of Slag Skull Peel-off of Shagang 5800m^(3) BF

作　　者：雷鸣 杜屏 朱华 焦克新[2] 张建良[2] LEI Ming;DU Ping;ZHU Hua;JIAO Kexin;ZHANG Jianliang(Shagang Group Co.,Ltd.,Zhangjiagang 215625,Jiangsu,China;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]江苏沙钢集团有限公司,江苏张家港215625 [2]北京科技大学冶金与生态工程学院,北京100083

出　　处：《炼铁》2023年第4期23-28,共6页Ironmaking

摘　　要：沙钢5800m^(3)高炉炉墙热负荷不稳定,渣皮频繁脱落,炉况长期顺行难以维持。从操作制度和原燃料质量两方面对渣皮脱落的影响进行了分析,认为:①将中心气流指数Z值控制在11.5左右、边沿气流指数W值控制在0.6左右,既能稳定中心煤气流,又能发展边缘气流;②将边沿焦炭负荷控制在3.8,同时尽可能减少布料矩阵的变动,能够较好地调节煤气流分布;③将风口回旋区占比控制在0.48~0.52、鼓风动能控制在153kJ/s左右,能够吹透中心,增加炉缸的活跃性;(4)将铁水温度控制在1505℃以上、[Si]保持在0.40%~0.45%,有利于提高渣皮的稳定性。The heat load of Shagang 5800m^(3) BF wall appeared unstable,and the slag skull peeled off frequently,making it dfficult to maintain the furnace running smoothly for a long time.The analysis is made on the impact of the furnace operating system and quality of the raw material and fuel on the peel-off of the slag skull,it was considered that:(1)as the Z value of the central gas flow index is controlled at about 11.5 and the W value of the edge gas flow index is controlled at about 0.6,it not only can stabilize the central gas flow,but also can serve the development of edge gas flow;(2)controlling the edge coke load at 3.8 and minimizing the change of the distribution matrix at the same time are in favor of the adjustment of the gas flow distribution;(3)keeping the proportion of the tuyere raceway at 0.48~0.52 and keeping the blast kinetic energy at about 153 kJ/s can ensure sufficient penetration of the blast through the center,which can enhance the activity of the hearth;(4)maintaining the hot metal temperature above 1505℃ and [Si] content at 0.40%-0.45%are conducive to improving the stability of slag skull.

关 键 词：特大型高炉 操作制度 原燃料质量 渣皮脱落 煤气流分布 

分 类 号：TF54[冶金工程—钢铁冶金]