Swelling Behaviour of Iron Ore Pellets during Reduction in H ₂ and N ₂ /H ₂ Atmospheres at Different Temperatures

The need to develop green steelmaking techniques has led the replacement of reducing agents such as CO with H2. H2 and N2/H2 mixtures can be used for carbothermal reduction iron ore. In this study, we investigated swelling index ore pellets in a forming gas (N2/H2) atmosphere at temperatures 700–1000 °C compared it that pure experimental results showed increases increasing temperature both atmospheres. maximum was reached approximately 5 min into process, while atmosphere, after 25–45 reduction, depending on temperature. When exceeded 900 °C, greater than 20%. Scanning electron microscopy/energy-dispersive X-ray spectroscopy performed detect changes microstructure chemical composition samples. nonreduced areas reduced during process were analysed using light optical microscopy. This article is protected by copyright. All rights reserved.