The kinetics of H redn. of Norwegian ilmenite ore powder was investigated at 927-1280 K. The activation energy of a surface chem. reaction was 69.6 kJ/mol as calcd. from wt. loss-time measurements according to the shrinking-unreacted core model. Optical microscopy of synthetically prepd. FeTiO3 pellets at redn. degrees of 25 and 35% showed the interface between the reacted and unreacted zones. An electron probe qual. anal. of the reduced specimens indicated a segregated Fe phase present as spheroidal nodules and TiO2 phase present in vein-like arrangements.
High temperature reduction kinetics of ilmenite by hydrogen / Bardi, G; Gozzi, Daniele; Stranges, Stefano. - In: MATERIALS CHEMISTRY AND PHYSICS. - ISSN 0254-0584. - STAMPA. - 17:4(1987), pp. 325-341. [10.1016/0254-0584(87)90085-X]
High temperature reduction kinetics of ilmenite by hydrogen
GOZZI, Daniele;STRANGES, Stefano
1987
Abstract
The kinetics of H redn. of Norwegian ilmenite ore powder was investigated at 927-1280 K. The activation energy of a surface chem. reaction was 69.6 kJ/mol as calcd. from wt. loss-time measurements according to the shrinking-unreacted core model. Optical microscopy of synthetically prepd. FeTiO3 pellets at redn. degrees of 25 and 35% showed the interface between the reacted and unreacted zones. An electron probe qual. anal. of the reduced specimens indicated a segregated Fe phase present as spheroidal nodules and TiO2 phase present in vein-like arrangements.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
