TITLE:
Kinetics of Direct Reduction Titanomagnetite Concentrate Briquette Produced from Rossetta-Ilmenite via Hydrogen
AUTHORS:
Naglaa Ahmed El-Hussiny, Atef El-Amir, Saied Thabet Abdel-Rahim, Khaled El hossiny, Mohamed El-Menshawi Hussein Shalabi
KEYWORDS:
Titanomagnetite, Ilmenite Hydrogen, Reduction Kinetics
JOURNAL NAME:
Open Access Library Journal,
Vol.1 No.5,
August
12,
2014
ABSTRACT: Reduction kinetics of titanomagnetite concentrate briquettes produced from Rossetta-llmenite ore via 1.5 liter/min hydrogen flow rate were investigated at different temperatures ranging from 600℃ to 950℃. It was found that the best reduction properties were found at 950℃, so the kinetic models shown by the briquettes at this temperature maybe: Diffusion control or Diffusion through ash layer (crank-cinslling-Broushten equation). And the apparent activation energy calculated for these models was 33.223 and 30.389 kJ/mole respectively. Also the main crystalline phases of reduced briquettes at 950℃ were metallic iron (syn. Fe), rutile (syn. TiO2) and some traces of magnetite (Fe3O4).