基于钒钛高炉的高效喷煤操作工艺技术研究  

Study on efficient pulverized coal injection operation technology in vanadium-titanium blast furnaces

作　　者：何海熙 徐灿 颜新[2] 邹忠平[2] HE Haixi;XU Can;YAN Xin;ZOU Zhongping(Intelligent Ironmaking Department,CISDI Information Technology(Chongqing)Co.,Ltd.,Chongqing 401120,China;Ironmaking Department,CISDI Engineering Co.,Ltd.,Chongqing 401120,China)

机构地区：[1]中冶赛迪信息技术(重庆)有限公司智能炼铁部,重庆401120 [2]中冶赛迪工程技术股份有限公司炼铁事业部,重庆401120

出　　处：《钢铁钒钛》2025年第1期198-204,共7页Iron Steel Vanadium Titanium

摘　　要：从提高钒钛高炉喷煤量及其稳定均匀性,进而降低喷吹能耗的目的出发,构建了规模和能力相当于1000 m3高炉喷煤系统的中试试验装置。在此基础上开展了不同喷煤工艺及控制参数(二次补气比例、加气量与置换气量比值、底部流化速度、出料方式)对提高喷煤量、固气比和稳定性影响的研究。试验结果表明,在管道喷吹气体总流量不变的情况下,随着二次补气比例降低,喷煤量和固气比大幅增加,稳定性有所降低,当二次补气比例控制到45%水平左右时,喷煤量和固气比达到最大值,节能空间最大。随着加压和置换气量的比值逐渐提高,喷煤量先增加后降低,当加压和置换气量比值控制在1.5~2时,喷煤量达到最大值。同样,底部流化速度应控制在0.02~0.025 m/s时,喷煤量、固气比及稳定性最优。对比上、下出料两种方式,上出料方式由于气体流动方向与出料方向一致,其稳定性更好。In order to achieve the goal of enhancing the pulverized coal injection(PCI)rate,along with its stability and uniformity in vanadium-titanium blast furnaces,ultimately reducing energy consumption,a pilot-scale experimental device was developed,equivalent in scale and capacity to a 1000 m3 blast furnace PCI system.Using this setup,the effects of various PCI processes and control parameters-including the secondary air injection ratio,the ratio of pressurized to replacement air,fluidization velocity,and discharge modes-on improving the injection rate,solid-gas ratio,and overall stability had been investigated.The experimental results revealed that,with a constant total gas flow in the injection pipeline,a decrease in the secondary air injection ratio led to a significant increase in both the injection rate and solid-gas ratio,as well as reduction in stability.When the secondary air injection ratio was maintained around 45%,the PCI rate and solid-gas ratio peaked,achieving the highest energy-saving potential.Furthermore,as the ratio of pressurized to replacement air increased,the PCI rate initially rose and then declined,reaching its maximum when the ratio was controlled between at 1.5~2.Similarly,the optimal bottom fluidization velocity was identified as 0.02~0.025 m/s,maximizing the injection rate,solid-gas ratio,and stability.Comparative analysis of two discharge modes(top discharge and bottom discharge)indicated that the top discharge mode offered superior stability due to the agreement of the gas flow direction with the discharge direction.

关 键 词：高炉喷煤 固气比 二次补气 流化速度 

分 类 号：TF541[冶金工程—钢铁冶金]