烧结料面燃料分加耦合低温点火碳减排新技术  

A new carbon reduction technology of fuel separated addition in sintered material surface coupled with low temperature ignition

作　　者：赵改革[1,2] 喻维纲 郑浩翔 汤乐云[2] 范晓慧[1] 方天任 甘敏[1] ZHAO Gaige;YU Weigang;ZHENG Haoxiang;TANG Leyun;FAN Xiaohui;FANG Tianren;GAN Min(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China;Hunan Valin Xiangtan Iron and Steel Co.,Ltd.,Xiangtan 411101,Hunan,China)

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083 [2]湖南华菱湘潭钢铁有限公司,湖南湘潭411101

出　　处：《中国冶金》2024年第10期91-98,共8页China Metallurgy

基　　金：国家重点研发计划资助项目(2023YFC3707001)。

摘　　要：为降低烧结过程的能源消耗和碳排放,提出一种烧结料面燃料分加耦合低温点火的新技术。通过在烧结料层表面分加占总燃料量5%~7%的燃料,并利用耙料器和平料板等设备使燃料均匀分布于表层,能在保证点火效果的前提下大幅降低点火温度,从而减少固体燃料和点火煤气的消耗。本技术在湘钢烧结厂获得工业应用,实践结果表明,采用低温点火技术后,3台烧结机点火温度下降16%~27%、煤气流量下降640~1900 km^(3)/h,烧结矿的点火能耗下降0.007~0.038 GJ/t,同时转鼓强度保持原有水平,吨矿固体燃耗有所降低,烟气中SO2和NOx含量明显下降。新技术的应用取得良好的节能减碳效果。In order to reduce the energy consumption and carbon emission of sintering process,a new technology of fuel separated addition in sintered material surface coupled with low temperature ignition was proposed,which could significantly reduce the ignition temperature under the premise of ensuring ignition effect,by adding 5%-7%of the total fuel on the surface of sintered layer and using the rakes and levelling boards to make the fuel uniformly distributed.Thereby,the consumption of solid fuel and ignition gas were reduced.The technology has been applied in Xiangtan Iron and Steel Co.,Ltd.,and the practical results show that,after adopting the technology,the ignition temperature of three sintering machines has decreased by 16%-27%,the flow rate of gas fuel has decreased by 640-1900 km^(3)/h,and the ignition energy consumption of sintered ore has decreased by 0.007-0.038 GJ/t.Meanwhile,the intensity of rotating drum is maintained at the original level,and the solid fuel consumption of sintered ore is reduced,the SO2 and NOx content in the flue gas decreases significantly.The application of the new technology achieves energy saving and carbon reduction result.

关 键 词：低碳烧结 低温点火 燃料分加 污染物减排 工业应用 

分 类 号：TF046.4[冶金工程—冶金物理化学]