Metallurgical Properties of Iron Ore Pellet when Using Bentonite Modified by Soda
Main Article Content
Abstract
This study reported the ability to use soda-modified bentonite applied to the pelletization of iron ore and its effect on metallurgical properties such as green pellet strength; compressive strength; degree of reduction. The properties of the pellets were used in different binders for comparison as bentonite, soda-modified bentonite (1; 2 % per weight of bentonite), and soda. Green pellets were tested drop numbers. After drying and atmosphere firing, pellets were reduced at 900; 1000; 1100 ºC for 30; 60; 120 minutes. The obtained results show that when using 1 % soda-modified bentonite as a binder in the pelletization process gives the highest degree of reduction while green pellet strength and compressive strength are appreciated values in addition when modifying bentonite by using soda not only to increase the adhesion of bentonite without affecting to the structure of bentonite but also helps increase the degree of reducibility of iron ore pellets. This modified bentonite by soda can be applied in pellet manufacturing in order to reduce the bentonite as binder in pelletization process.
Keywords
Iron ore pellet, metallurgical properties, modified bentonite, soda.
Article Details
References
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[3] O. Sivrikaya and A. I. Arol, Effects on metallurgical and chemical properties, HOLOS, Vol. 30, No. 3, p. 104, 2014. http://dx.doi.org/10.15628/holos.2014.1759
[4] Tran Thi Thu Hien, Bui Duy Tien, Nguyen Dinh Vu, Effect of binder on properties of iron ore pellets, Conference of National Science in Metallurgy and Advanced Materials Technology, Hanoi, pp. 67-72, 2016. (Orginal text in Vietnamese).
[5] A. K. Mandal, O. P. Sinha, Characterization of fluxed iron ore pellets as compared to feed material for blast furnace, Journal of Progressive Research in Chemistry, Vol. 2, No. 1, pp. 71, 2015.
[6] Gul, A. A. Sirkeci, F. Boylu, G. Guldan, F. Burat, Improvement of mechanical strength of iron ore pellets using raw and activated bentonites as binders, Physicochemical Problems of Mineral Processing, pp. 23-36, 2015.
[7] A. Saidi, M. Shamanian, M. Barati, K. Azari, Hyperactivation of bentonite in pelletizing process, International Journal of ISSI, Vol.1, No. 1, pp. 38-41, 2004.
[8] Amitava Basumallick, Influence of CaO and Na2CO3 as additive on the reduction of hematite-lignite mixed pellets, ISIJ International. Vol. 35, pp. 1050-1053, 1995. https://doi.org/10.2355/isijinternational.35.1050
[9] Huang Yan-fang, Zhang Yuan-bo, Han Gui-hong, Jiang Tao, Li Guang-hui, Yang Yong-bin, Xu Bin, Guo Yufeng, Sodium-modification of Ca-based bentonite via semidry process, Journal of Central South University of Technology, pp. 1201-1206, 2010. https://doi.org/10.1007/s11771-010-0619-9
[10] Larry A. Haas, Jeffrey A. Aldinger, and Robert K. Zahl, Effectiveness of organic binders for iron ore pelletization, Report of Investigations 9230, pp. 21, 1989.
[11] S. Ueda, K. Yanagiya, K. Watanabe, T. Murakami, R. Inoue and T. Ariyama, Reaction model and reduction behavior of carbon iron ore composite in blast furnace, ISIJ Inter. Vol. 49, No. 6, pp. 827-36, 2009. https://doi.org/10.2355/isijinternational.49.827