不同容积高炉风口焦微观性能研究  

Study on microscopic property of tuyere coke in blast furnace of different volumes

作　　者：姜雨[1] 徐秀丽[1] 高睿遥 孟令慧 边春杨 Jiang Yu;Xu Xiuli;Gao Ruiyao;Meng Linghui;Bian Chunyang(Sinosteel Anshan Research Institute of Thermo-energy Co.,Ltd.,Anshan Liaoning 114044,China)

机构地区：[1]中钢集团鞍山热能研究院有限公司,辽宁鞍山114044

出　　处：《煤化工》2025年第1期12-16,共5页Coal Chemical Industry

基　　金：辽宁省揭榜挂帅项目(2022JH1/10800065)。

摘　　要：以4000 m^(3)级高炉风口焦(A)和2000 m^(3)级高炉风口焦(B)为研究对象,通过粒度筛分、XRD、压汞法和光学组织等检测结果分析,对比研究了各粒级风口焦的气孔分布特性及微观结构特征。结果表明:4000 m^(3)级高炉和2000 m^(3)级高炉风口焦均以25 mm~10 mm粒度占比为主;随着风口焦粒度的降低,风口焦A和风口焦B的气孔率均呈现下降趋势,风口焦A在粒度10 mm~5 mm范围内的平均孔径最大,风口焦B在粒度大于40 mm时的平均孔径最大;随风口焦粒度的降低,丝质和破片结构含量升高,光学异性结构含量降低,各向同性结构略有增加,OTI值降低;同等粒度下,风口焦外部比内部的石墨化程度高,说明焦炭内部与外部发生的反应不同;在高炉冶炼中,丝质与破片抗CO_(2)侵蚀能力最大,其次是同性结构,最后是异性结构。Taking the tuyere coke of 4000 m^(3) vertical blast furnace(A)and 2000 m^(3) vertical blast furnace(B)as the study object,the pore distribution and microstructure characteristics of tuyere coke of different particle sizes were compared and studied through analyzing the test results of particle size screening,XRD,mercury injection and optical texture.The results showed that tuyere coke of both 4000 m^(3) vertical blast furnace and 2000 m^(3) vertical blast furnace was dominated by 25 mm-10 mm particle size.As the particle size of tuyere coke decreased,the porosity of tuyere coke A and tuyere coke B showed a decreasing trend,the average pore size of tuyere coke A was the largest with particle size in the range of 10 mm-5 mm,and the average pore size of tuyere coke B was the largest with particle size greater than 40 mm.As the particle size of tuyere coke decreased,the content of filamentous and ragged structures increased,the content of optically anisotropic structures decreased,the content of isotropic structures slightly increased,and the value of OTI decreased.At the same particle size,the external part of the tuyere coke was more graphitized than the internal part,indicating different reactions occurring inside and outside the coke.In the blast furnace smelting,filamentous and ragged structures had the most resistance to CO_(2) erosion,followed by isotropic structures,and lastly anisotropic structures.

关 键 词：高炉 风口焦 粒度分布 气孔分布 光学组织 微观结构 

分 类 号：TF526.1[冶金工程—钢铁冶金]