首页|全PMC精粉球团生产过程烟气排放分析

全PMC精粉球团生产过程烟气排放分析

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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,井深入探讨回转窑烟气迁移过程中料面温度对SO2、NOx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(SiO2)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、SO2和NOx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,SO2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.
Analysis of Flue Gas Emissions in the Production Process of Full PMC Fine Powder Pellets
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 SO2,NO.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 SiO2 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,SO2 and NOx 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 SO2 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.

full PMC fine powderpellet productiongrate-rotary kilnmaterial surface temperaturecontaminant

刘禹秋、胡启晨、宋雅贤、李斌、苏海兰、张丹

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中冶京诚工程技术有限公司,北京 100083

唐钢青龙炉料有限公司,河北 秦皇岛 066000

全PMC精粉 球团生产 链篦机-回转窑 料面温度 污染物

2024

山西冶金
山西省金属学会 山西省有色金属学会

山西冶金

影响因子:0.139
ISSN:1672-1152
年,卷(期):2024.47(11)