Improvements in Yield in an All DRI-Fed EAF From Minimization of FeO Generation During Melting as Well as Post-Reduction of FeO From Residual Slag
(Room 208B)
08 May 17
10:30 AM
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11:00 AM
Tracks:
Use of DRI in Steelmaking
In recent years, the team at ArcelorMittal Mexico has totally focused on improving iron yield in the continuing challenging economic environment. A previous paper highlighted recycling and briquetting of DRI fines, which improved yield more than 2%. Additional yield savings was possible by a tighter control of ppm oxygen at tap to avoid excess generation of FeO. This also applies to generation of FeO during the heat. We have been able to show that, by delaying the initiation of lancing, the final slag % FeO can be reduced and aim carbon can be met. We have also developed a practice for recovering Fe units by reduction of FeO from the residual slag in the hot heel remaining in the furnace after tap. Together, both practices contribute sizeable improvements in yield, in addition to the savings from management of DRI fines.