Using Stiff Extrusion of DRI Fines and Dust to Make Fluxed Pig Iron, a High-Value Charge for EAFs

Direct reduced iron dust represents a high-value byproduct that is intrinsically difficult to agglomerate and can be difficult to transport. An agglomeration technique is introduced, using heated stiff extrusion, to produce a “Fluxed Pig Iron” (FPI) charge for EAFs. These extruded briquettes are waterproof and magnetic, preserving the value of the DRI while increasing storage and shipping options. They contain a lime flux ranging from 0 to 15% and a carbon source ranging from 6 to 20%. A 100-ton pilot study demonstrated the successful application of FPI extruded briquettes in a North American EAF, providing value and improving efficiency.

Authors:

Mr. Mark Ford | J.C. Steele & Sons Inc.
 

Ms. Joyce Aderhold | Lhoist Rheinkalk GmbH
 

Mr. Mac Steele | J.C. Steele & Sons Inc.
 

Mr. William Johnson | Lhoist Group
 

Session Chairs:

Vincent Chevrier | Midrex Technologies, Inc.
 

Elaine Chen | ArcelorMittal Texas HBI LLC
 

Amit Ahsan | SECOPTA analytics GmbH