About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advances and Challenges in Decarbonization of the Steel Industry
|
| Presentation Title |
The Effect of Iron Oxide Pellet Properties and Reducing Atmosphere on Gas Based Reduction of Commercial Grade Iron Oxide Pellets |
| Author(s) |
Lysa Chizmadia, Samuel Pennell, Brett Spigarelli, David Haugen |
| On-Site Speaker (Planned) |
Brett Spigarelli |
| Abstract Scope |
The presented work explores the effect of iron oxide pellet properties and reduction atmosphere on reduction performance - specifically the reduction kinetics, degree of metallization, and carburization. Reduction experiments were conducted using two distinct commercial grade iron oxide pellets under atmospheres ranging from 100% carbon monoxide (CO) to 100% hydrogen (H2) at 800 OC, with methane gas as the carburizing agent. It was determined that the iron oxide pellet properties and reduction atmosphere played a significant role in reduction performance, with pellet physical properties having a larger impact under a CO atmosphere. Optical analysis revealed that the reduction atmosphere has a significant impact on the metallization and carburization. Increasing H2 content in the reducing gas mixture leads to increased metallization, increased porosity, and subsequently increased carbide formation. Carbide formation proceeds from the surface of each Fe grain inward, with higher carbide formation observed for pellets with higher metallization and porosity. |