全PMC精粉球团生产过程烟气排放分析  

Analysis of Flue Gas Emissions in the Production Process of Full PMC Fine Powder Pellets

作　　者：刘禹秋 胡启晨 宋雅贤 李斌 苏海兰 张丹 Liu Yuqiu;Hu Qichen;Song Yaxian;Li Bin;Su Hailan;Zhang Dan(MCC Capital Engineering and Research Incorporation Limited,Beijing 100083,China;Tangshan Steel Qinglong Furnace Charge Co.,Ltd.,Qinhuangdao Hebei 066000,China)

机构地区：[1]中冶京诚工程技术有限公司,北京100083 [2]唐钢青龙炉料有限公司,河北秦皇岛066000

出　　处：《山西冶金》2024年第11期80-84,共5页Shanxi Metallurgy

基　　金：国家重点研发计划课题(2023YFC3707005);山西省科技重大专项计划“揭榜挂帅”项目:高炉富氢低碳冶炼关键工艺技术研究与工业示范(202201050201011)。

摘　　要：结合链篦机-回转窑球团生产实例,研究全南非PMC精粉球团生产情况及烟气污染物排放现状,并深入探讨回转窑烟气迁移过程中料面温度对SO_(2)、NO_(x)和颗粒物入口浓度的作用规律。实践数据表明,采用全PMC精粉造球能够有效保证球团质量和产量,全PMC精粉的全铁品位较高、w(SiO_(2))较低,在生产过程中回转窑结圈现象不明显。经过工艺净化设施处理后,烟气颗粒物、SO_(2)和NO_(x)的排放浓度均满足秦皇岛市球团焙烧烟气污染物的特别排放要求。通过分析回转窑温度对球团烟气的影响发现,回转窑料面温度的升高会影响烟气气体污染物排放行为。当料面温度和球团内部温度达到一致时,SO_(2)浓度达到最大值。烟气颗粒物质量浓度整体上和球团粉化有关,与料面温度无相关性。The purpose of this paper is to study the production of PMC fine powder pellets and the current situation of flue gas pollutant emissions in South Africa by combining the production examples of grate-rotary kiln pellets,and to deeply explore the effect of material surface temperature on SO_(2),NO_(x) and particulate matter inlet concentrations during the flue gas migration process of rotary kilns.The practical data show that the use of all PMC fine powder pelletizing can effectively ensure the quality and yield of pellets,and the whole PMC fine powder has a high all-iron grade and a low SiO_(2) mass fraction,and the phenomenon of rotary kiln ring is not obvious in the production process.After treatment by process purification facilities,the emission concentrations of flue gas particulate matter,SO_(2) and NO_(x) all meet the ultra-low emission limit standards of pellet roasting flue gas in Qinhuangdao City.By analyzing the influence of rotary kiln temperature on pellet flue gas,it is found that the increase of material surface temperature of rotary kiln will affect the emission behavior of flue gas pollutants,and when the material surface temperature and the internal temperature of the pellet reach the same level,the SO_(2) concentration reaches the maximum value.The mass concentration of flue gas particulate matter was correlated with pellet pulverization as a whole,but had no correlation with the material surface temperature.

关 键 词：全PMC精粉 球团生产 链篦机-回转窑 料面温度 污染物 

分 类 号：TF09[冶金工程—冶金物理化学]