Structure evolution of a magnetite iron ore/carbon composite pellet during solid-state reduction under microwave heating

• DOI: 10.52923/vmfs.jstm.102021.98.01
• Publication Date: 2021-11-18T10:19:50Z
• Authors: Cuong Phung Kien; Dung Ngo Quoc; Anh Do Thi; Hieu Nguyen Sy; Tuyen Ngo Duc; Tung Nguyen Quang; Thu Chu Thi Minh; Khoi Lai Vinh; Chien Do Nguyen Q...; Oanh Nguyen Thi H...; Viet Nguyen Hoang
• Keywords: Fayalite; Wüstite; Pelletizing; Pellet; Iron ore; Carbon fibers; Slag (welding)

In the present study, structure evolution under direct reduction of a Minh-Son magnetite iron ore/carbon composite pellets in microwave-heating kiln different microwave wattage 60 and 90 % (with firing time from 15 to 120 min.) was investigated. The microstructure characterized by scanning electron microscopy coupled with energy dispersive spectroscopy X-ray diffraction (XRD). phase formation indexed using MDI Jade peaks matching reference sample. At microwave’s %: wustite (FeO) has appeared after min., metallic fayalite have reduced samples min. retained phases Fe203, Fe304, FeO Si02– While at %, 30 min final pellet, shows only according XRD resolution. work could provide scientific understanding illustrate pellet behavior during solid-state carbothermic microwave-heating.