Kinetics irregularities during the ferruginous lateritic ore reduction by hydrogen
Keywords:
Hydrogen-based reduction, kinetics, ferruginous laterite, activation energyAbstract
The objective was to study the ferruginous lateritic ore reduction process under non-isothermal conditions via a thermogravimetric analysis in a Du Pont 1090 device at up to 900 0C. Hydrogen was used as a reductive gas. The apparent activation energy calculation results indicate that the control process is governed by the chemical reaction. The study of the reduction process using pellets of this mineral under isothermal conditions was conducted in a heat-resistant steel cylinder under a reducing atmosphere composed of H2=56,1 %, CO=37,4 % and CO2=6,5 % at temperatures of 890 0C and 960 0C. The result was a metal with nickel content which was characterized using the scanning optical microscopy, x-ray diffraction and optical microscopy techniques.Downloads
References
BEDOLLA, E.; LEÓN, C. A. & AGUILAR, E. A. 1997: Aplicación de técnicas no isotermicas en la reducción de tres minerales de hierro de grado commercial. Metalurgia 33(4): 239-249.
BETHLEHEM STELL. 1946: Export Corporation Catalog 180. New York, 16-20 p.
CIS. 1966: Características y aplicaciones del acero Mayarí. Informe del Centro de Investigaciones Siderúrgicas, Nicaro.
HAITAO, W. & SONN, H. 2013: Hydrogen reduction kinetics of magnetite particles Metallurgical and Materials Transactions 44(1): 133-135.
JAN DAO. 1980: Reducción conjunta de óxidos de hierro, níquel y cobalto en condiciones no isotérmicas. Instituto del Acero y Aleaciones. Moscú, 37-47.
MOO, E.; SOHN, H. & GILSOO, H. 2008: Suspension reduction technology for iron making with low energy requierement and CO2 emission. University of Utah. Metal. 1-6
ORTIZ, J.; VASILEVNA, V.; LARREA, M. & CORES, A. 1988: Regularidades cinéticas en el proceso de reducción conjunta de óxidos de níquel y de hierro en condiciones no isotérmicas. Metalurgia 24(6): 367-371.
PINEAU, A.; KANARI, N. & GABALLAN, I. 2006: Kinetics of reduction of iron oxides by H2. Thermochimica Acta 447: 89-100.
PRAKASH, S. 1994: Non-isothermal kinetics of iron ore reduction. Iron making Steelmaking 21(3): 237-243.
SEROV, G. 1978: Métodos fisicoquímicos de investigaciones de procesos metalúrgicos. Instituto de Acero y Aleaciones. Moscú.
Published
How to Cite
Issue
Section
- Authors retain copyright and guaranteeing the right magazine to be the first publication of the work as licensed under a Creative Commons Attribution-NonCommercial that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
- Authors may establish separate supplemental agreements for the exclusive distribution version of the work published in the journal (eg, place it in an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
- Authors are allowed and recommended to disseminate their work through the Internet (e.g., in institutional telematic archives or on their websites) before and during the submission process, which can produce interesting exchanges and increase citations of the published work. (See The effect of open access)
