Emission Profile of PM_(10) and PM_(2.5) in Iron Ore Sintering Process and Control Technology

摘要

Controlling the emission of ultra-fine particulate matters (PM_(10) and PM_(2.5)) in sintering process is significant for green iron & steel manufacturing. In this investigation, the emission profile and control technique of PM_(10) and PM_(2.5) during sintering process were studied. PM_(10) and PM2.5 characterized high emission concentration in special sintering areas, which were sintering stage-4 to stage-6, and sintering stage-4 to stage-5, respectively. The emission load of PM_(10) and PM_(2.5) in special areas accounted for about 63.5 and 47.0% of the total, respectively. Based on these properties, spraying organic binder solution on granules during granulation process was found to improve the absorption efficiency of sintering bed to PM_(10) and PM_(2.5), which made them intensively emitted within sintering stage-5 and stage-6, with accounting for 74.8 and 74.2% of the total. The research findings were helpful to realize the efficient and economic control of PM_(10) and PM_(2.5) in practical sintering plants.