Compared to BOF steelmaking,EAF steelmaking has great flexibility and may become a future development trend.Analyze the de-dusting-renovation case of a 100t EAF in a South American steel plant,compare the differences between domestic and foreign EAF dedusting systems,and provide reference for engineering applications.The fume capture method combining furnace exhaust(primary fume),deflector,and roof cover is adopted.The primary fume enters the water mist quench tower through an insulated fume duct,mixes with the fume of roof cover to cool down and enters the bag filter for purification.The processing air volume of the dedusting system is 2.2 million m3/h,and the concentration of purified particulate matter emissions is controlled less than or equal to 20 mg/Nm3,while the concentration of dioxin emis-sions is controlled less than or equal to 0.2ng-TEQ/m3.After the renovation was completed,the hygiene conditions of the workplace were sig-nificantly improved and met the requirements for air pollution emissions.
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