INVESTIGADORES
BOHE Ana Ester
artículos
Título:
The kinetics and mechanism of selective iron chlorination of an ilmenite ore.
Autor/es:
GASTÓN GALO GOUGA; DANIEL MIGUEL PASQUEVICH; ANA ESTER BOHÉ
Revista:
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
Editorial:
Mark Simon-MANEY
Referencias:
Año: 2007 vol. 116 p. 230 - 238
ISSN:
0371-9553
Resumen:
The kinetics of the ilmenite chlorination was studied between 600 and 850uC. The ilmenite
chlorination rate was determined by monitoring the mass changes using a thermogravimetric
system of high resolution. Non-isothermal and isothermal runs were performed. The influence of
temperature, chlorine flow and sample mass in the reaction rate was established. The thermal
decomposition of ilmenite previous to the chlorination was taken into account. The formation of
intermediate titanates during the chlorination reactions was found. The dependence of the
reaction rate with temperature was analysed, and apparent activation energy of 186 kJ mol21 was
obtained for the chlorination process. A global mechanism was proposed involving: rupture of the
ilmenite structure, formation and subsequent decomposition of pseudorutile and chlorination of
hematite.
