Reduction of Composite Pellet Containing Indonesia Lateritic Iron Ore as Raw Material for Producing TWDI

Abstract:

Blast furnace process is still an important process for producing pig iron. The process needs high grade iron ore and coke. The two materials can not be found easily. In addition blast furnace process needs cooking and sintering plant that produces polluted gases. Utilization of composite pellet for pig iron production can simplify process. The pellet is made of iron ore and coal. In addition the pellet can be made from other iron source and coal. This paper discusses the evolution of phase during reduction of composite pellet containing lateritic iron ore. Fresh iron ore and coal were ground to 140 mesh separately. They were mixed and pelletized. The quantity of coal added was varied from 0 %, 20 % and 29 % of pellet weight. Pellets were heated with 10 °C/minute to 1100 °C, 1200 °C, 1300 °C and 1350 °C in a tube furnace and temperature was held during 10 minutes. Heated pellets were analyzed with XRD equipment. XRD of reduced pellets showed that iron phase change with coal and temperature. Lack of coal during heating results the re-oxidation of iron phases. This process is due to replacement of reductive atmosphere by oxidative atmosphere.

• Periodical: Applied Mechanics and Materials (Volume 281)
• Pages: 490-495
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.281.490
• Online since: January 2013
• Authors: Adji Kawigraha, Johny Wahyuadi Soedarsono, Sri Harjanto, Pramusanto Pramusanto
• Keywords: Composite Pellet, Iron Ore Reduction, Lateritic Iron Ore

References

[1] Chukwuleke, Okonkwo Paul., Cai Jiu-ju, Chukwujekwu, Sam., Xiao Song., 2009. Shift from Coke to Coal Using Direct Reduction Method and Challenges, Journal of Iron and Steel Research International, 16, 2, 01-05.

DOI: 10.1016/s1006-706x(09)60018-2

[2] Harada Takao, Tsuge Osamu, Kobayashi Isao, Tanaka Hidetoshi, Uemura Hiroshi, 2005. The Development of New Iron Making Process, Kobelco Technology Review, No. 26, 92-97.

[3] Michishita Haruyasu., Tanaka Hidetoshi., 2010. Prospects for Coal-based Direct Reduction Process, Kobelco Technology Review, No. 29, 47-49.

[4] Kikuchi Shoichi, Ito Shuzo, Kobayashi Isao, Tsuge Osamu, Tokuda Koji., 2010. ITmk3 Process, Kobelco Technology Review, No. 29, 77-84.

[5] Srivasta, U., Kawatra, S. Komar., 2009. Strategies for Processing Low-Grade Iron Ore Minerals, Mineral Processing and Extractive Metallurgy Review, 30, 361-371.

DOI: 10.1080/08827500903185208

[6] Mondal, K., Lorethova, H., Hippo, E., Wiltowski, T., Lalvani, S.B., 2004. Reduction of iron oxide in carbon monoxide atmosphere—reaction controlled kinetics, Fuel Processing Technology, 86, 33– 47.

DOI: 10.1016/j.fuproc.2003.12.009

[7] Jozwiak, W.K., Kaczmarek, E., Maniecki, T.P., Ignaczak, W., Maniukiewicz, W., 2007. Reduction behavior of iron oxides in hydrogen and carbon monoxide atmospheres, Applied Catalysis A: General, 326, 17–27.

DOI: 10.1016/j.apcata.2007.03.021

[8] Murakami, Taichi., Nishimura, Takeshi., Kasai, Eiki., 2009. Lowering Reduction Temperature of Iron Ore and Carbon Composite by Using Ores with High Combined Water Content, ISIJ International, Vol. 49, No. 11, 1686-1693.

DOI: 10.2355/isijinternational.49.1686

[9] Murakami, Taichi., Kasai, Eiki., 2011. Utilization Of Ores with High Combined Water Content for Ore-carbon Composite and Iron Coke, ISIJ International, Vol. 51, No. 8, 1220-1226.

DOI: 10.2355/isijinternational.51.1220

[10] Sun Kang., Lu, W.K., 2009. Mathematical Modeling of the Kinetics of Carbothermic Reduction of Iron Oxides in Ore-Coal Composite Pellets, Metallurgical and Materials Transactions B, 40 B, 91-103.

DOI: 10.1007/s11663-008-9199-6

[11] Liu, Gui-su., Strezov, Vladimir., Lucas, John A., Wibberley, Louis J., 2004. Thermal investigations of direct iron ore reduction with coal, Thermochimica Acta, 410, 133–140.

DOI: 10.1016/s0040-6031(03)00398-8