Reaction Mechanism and Thermodynamics of Segregation Roasting of Iron Oxide
International Journal of Mineral Processing and Extractive Metallurgy
Volume 1, Issue 5, November 2016, Pages: 64-69
Received: Sep. 7, 2016; Accepted: Oct. 31, 2016; Published: Jan. 5, 2017
Views 3944      Downloads 133
Maitreyee Bhattacharya, Metal Extraction & Forming Division, CSIR-National Metallurgical Laboratory, Jamshedpur, India
Article Tools
Follow on us
This paper presents the reduction mechanism of iron recovery from pure ferric oxide by the segregation roasting-magnetic separation process both from the chemical reaction and physical phenomena point of view. In segregation roasting process, coal is used as the reducing agent and calcium chloride as chlorinating agent. Segregation roasting of iron oxide has been studied at different temperatures from 800 to 1000°C varying the chloride and carbon percentages. The same experimental conditions have been adopted to recover iron from mill scale by the process of segregation roasting. By segregation roasting, iron oxide is reduced by a combination of chlorination, volatilization and hydrogen reduction. Elucidation of the reaction mechanism of segregation process is being attempted in this present study. Characterization of the segregated iron particles recovered after magnetic separation both from ferric oxide and mill scale is studied by electron probe microscopy analyzer.
Segregation Roasting, Iron Oxide, Alkali Chloride, Thermodynamics, Reaction Mechanism, EPMA, SEM
To cite this article
Maitreyee Bhattacharya, Reaction Mechanism and Thermodynamics of Segregation Roasting of Iron Oxide, International Journal of Mineral Processing and Extractive Metallurgy. Vol. 1, No. 5, 2016, pp. 64-69. doi: 10.11648/j.ijmpem.20160105.13
Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License ( which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
M. I. Brittan, ‘Kinetics of copper segregation by the TORCCO process’, Journal of South African Institute of Minning and Metallurgy, Bebruary 23, 1970, pp. 278-289.
M. Kawtara, “Segregation roasting of a Saprolitic ore- An Expermental Investigation”, TMS, San Diego, California, February 27 March, 2011.
I. Iwasaki, Nickel segregation, Proceedings of the panel discussion on Nickel segregation, AIME, San Francisco, California, February 23, 1972.
S. P. Mehrotra and V. Srinvasan, “Extraction of nickel from an Indian Laterite by segregation roasting”, Trans. Instn. Min. Metall., 103, May-August 1994, pp. C97-C104.
J. K. Right, “Nickel Laterite Treatment by Segregation”, Pyrometallurgy for complex materials & Wastes, Ed. M Nilmani, The Minerals, Metals & Materials Society, 1994, pp219-232.
I. IIlic, et al., “The study of Chlorination Nickel Oxide by Chlorine and Calcium Chloridein the presence of active additives”, Scandivian Journal of Metallurgy, 1997, 26, pp 14-19.
I. D. Reznik et al., “Mechanism and Technology of Segregation Roasting of oxide Nickel ores with subsequent Calcine Flotation and concentrate Leaching”, EPD Congress, TMS, 2004, pp725-737.
A. S. Ericson, J. Svensson, K. Ishii, “Development of the MINPRO-PAMCO, “Nickel Segregation Process, Journal of Metals, September, 1984, pp 42-46.
A. S. Ericson, J. Svensson, K. Ishii, “Development of the MINPRO-PAMCO, “Nickel Segregation Process, International Journal of Mineral Processing, 19(1987) pp223-236.
Liu Wan-rong, Li Xin-hai, HU Qi-yang, WANG Zhi-xing, GU Ke-zhuan, Li Jin-hui, Zhang Lian-xin, “Pretreatment study on chloridizing segregation and magnetic separation of low-grade nickel Laterites”, Trans. Nonferrous. Met. Soc. China 20,2010, 82-86.
AbdulWahab A. Al-Ajeel and Saly. N. Mandy, “Beneficiation of AL-Hussainyiat Low grade Iron Ore by segregation Roasting”, Iraqi Bulletin of Geology and Minning, 2, 2, 2006, pp 103-113.
V. Hermandez, K. Peake, R. Brown, J. Olurin, T. O’ Farell, M. Zhou, B. Liu, I. Cameron, ‘Process Development of a New DRI Technology for Oolitic Iron Ores”.
Bouvard, D. Métallurgie des poudres, Paris, Hermès Science Publications, (2002).
Pineau, A., Kanariand, N., Gaballah, I. Kinetics of Reduction of Iron Oxides by H2, Part I: Low Temperature Reduction of Hematite, Thermochimica Acta, 447 (2006) 89.
Pineau, A., Kanariand, N., Gaballah, I. Kinetics of Reduction of Iron Oxides by H2, Part II: Low Temperature Reduction of Magnetite, Thermochimica Acta, 456 (2007) 75.
El-Geasy, A. A., Nasr, M. I. Influence of Original Structure on the Kinetics and Mechanisms of Carbon Monoxide Reduction of Hematite Compacts. ISIJ International, 30 (1990) 417.
O. Benchiheub, S. Mechachti, S. Serrai, M. G. Khalifa, Elaboration of iron powder from mill scale, J. Mater. Environ. Sci., 1, 4, (2010) 267-276.
Science Publishing Group
1 Rockefeller Plaza,
10th and 11th Floors,
New York, NY 10020
Tel: (001)347-983-5186