高炉风口取焦研究实践  

Research and Practice on Coke Extraction from Blast Furnace Tuyere

作　　者：张超民 辛渊 李保良 贾宪 栗文龙 Zhang Chaomin;Xin Yuan;Li Baoliang;Jia Xian;Li Wenlong(Tieqian Management Center,Jingye Iron&Steel Co.,Ltd.,Shijiazhuang Hebei 050000,China)

机构地区：[1]敬业钢铁有限公司铁前管理中心,河北石家庄050000

出　　处：《山西冶金》2024年第11期150-152,155,共4页Shanxi Metallurgy

摘　　要：为深入研究焦炭在高炉内的劣化机理,定量描述炉缸焦炭粒度和透液性能,对入炉焦炭质量进行科学全面评价,敬业钢铁先后对2座高炉进行了3次风口取焦实验。通过对实验数据进行统计分析,计算出取样高炉的风口前焦炭平均粒度15.33 mm,炉缸焦炭平均粒度10.47 mm,回旋区长度1.75~2.25 m,炉缸活跃程度56%~68%。实验还发现高炉炉缸焦炭粒度及透液能力与煤比存在明显负相关关系,高炉煤比稳定是炉内焦炭粒度稳定的重要保障。参照对标高炉相关参数,得出取样高炉日常使用的焦炭处于中等偏下水平,不利于进行长时间重负荷冶炼的结论。依据实验结论,采取增加顶装干熄焦炭使用比例、增加进厂焦炭平均粒度验收指标、调整M_(10)验收指标、稳定日常炉况操作煤比控制等方式,改善入炉焦炭整体质量,保证炉缸焦炭粒度水平和透液能力,为高炉保持长期稳定顺行和进一步强化冶炼提供支撑。In order to conduct in-depth research on the degradation mechanism of coke in blast furnaces,quantitatively describe the particle size and liquid permeability of coke in the furnace hearth,and scientifically and comprehensively evaluate the quality of coke entering the furnace,Jingye Iron and Steel conducted three coke extraction experiments at the tuyere of two blast furnaces.Through statistical analysis of experimental data,the average particle size of coke in front of the tuyere of the sampled blast furnace was calculated to be 15.33 mm,the average particle size of coke in the hearth was 10.47 mm,the length of the swirling zone was 1.75~2.25 m,and the activity level of the hearth was 56%~68%.The experiment also found a significant negative correlation between the coke particle size and liquid permeability of the blast furnace hearth and the coal ratio.The stability of the blast furnace coal ratio is an important guarantee for the stability of coke particle size in the furnace.Referring to the relevant parameters of the benchmark blast furnace,it is concluded that the daily use of coke in the sampled blast furnace is at a medium to low level,which is not conducive to long-term heavy load smelting.Based on the experimental conclusions,measures such as increasing the proportion of top mounted dry quenched coke,increasing the average particle size acceptance index of incoming coke,adjusting the M_(10) acceptance index,and stabilizing the daily furnace operation coal ratio control are taken to improve the overall quality of incoming coke,ensure the level of coke particle size and liquid permeability in the furnace,and provide support for maintaining long-term stable and smooth operation of the blast furnace and further strengthening smelting.

关 键 词：高炉 焦炭 风口 粒度 风速 

分 类 号：TF573.7[冶金工程—钢铁冶金]