大喷煤条件下鞍钢高炉喷吹煤粉的炉内利用率  

Utilization rate of coal injection for blast furnace in Ansteel under the large injection condition

作　　者：曾宇[1] 姜喆[1] 张建良[2] 张楠 滕海鹏 王广伟[2] ZENG Yu;JIANG Zhe;ZHANG Jian-liang;ZHANG Nan;TENG Hai-peng;WANG Guang-wei(Ironmaking Plant,Ansteel Company Limited,Anshan 114021,Liaoning,China;School of Metallurgy and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]鞍钢股份有限公司炼铁总厂,辽宁鞍山114021 [2]北京科技大学冶金与生态工程学院,北京100083

出　　处：《中国冶金》2022年第3期61-67,共7页China Metallurgy

基　　金：国家自然科学基金资助项目(51774032)。

摘　　要：为了探究目前大喷煤条件下煤粉喷入高炉后在炉内的利用情况,对鞍钢高炉除尘灰进行收集、取样和测试;同时采用岩相分析手段观察分析高炉炉尘中未燃煤粉、焦炭和矿物质灰渣的组成及微观形貌,定量计算出除尘灰中不同含碳物质的质量分数。结果表明,整体来看,鞍钢4座3200 m^(3)级别的大高炉喷吹煤粉在炉内的利用率要低于其余4座小高炉,说明高炉在提高煤比的同时,还需重点关注煤粉的燃尽率。通过调节各项操作参数来提高煤粉在高炉内的利用率,可节约生产成本并保证高炉的顺行稳产。In order to explore the utilization of pulverized coal under current large-scale coal injection conditions,the dust collection,sampling and test was carried out for Ansteel blast furnace.Through laboratory testing,the carbon mass fraction of different substances in dust were tested and calculated quantitatively and the unburned pulverized coal,coke,mineral composition and microstructure of dust were analyzed by petrographic analysis methods.The results show that the utilization rate of pulverized coal of four 3200 m^(3)blast furnaces are lower than that of the other four blast furnaces in Ansteel,indicating that coal burnout rate should be paid more attention while increasing the coal ratio.By adjusting the operation parameters,the utilization rate of pulverized coal can be improved,production cost can be saved and stable production of blast furnace can be guaranteed.

关 键 词：高炉喷煤 炉尘 未燃煤粉 岩相分析 利用率 

分 类 号：TF538.63[冶金工程—钢铁冶金]