Characteristics of the Sierra Leone High Alumina Iron Ore and Utilization in Sintering

Abstract:

The characteristics of the Sierra Leone iron ore were studied at laboratory scale by chemical analysis, XRD, SEM-EDS and TG-DSC methods. The Sierra Leone iron ore was a kind of limonite, which was mainly consisted of hematite, goethite and gibbsite. The iron ore lost its crystal water at a fast speed ranging from 200°C to 400°C and the total content of the crystal water was about 8.2 wt.%. The initial melt formation temperature of the iron ore with CaO was stably kept at around 1209°C and the amount of liquid increased with the increasing of CaO content. Its melt formation temperature is higher than Australian limonite. The sintering pot test showed that the yield of sinter decreases from 78.37wt.% to 73.36wt.% and the drum index decreases from 60.5wt.% to 49.63wt.% when the blending ratio of Sierra Leone iron ore increases from 7wt.% to 27.3wt.%.

• Periodical: Advanced Materials Research (Volumes 881-883)
• Pages: 1515-1521
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.881-883.1515
• Online since: January 2014
• Authors: Jie Ji Dong, Guang Wang*, Mao Fang Zuo, Hua Li, Qing Guo Xue
• Keywords: Characteristic, Gibbsite, Sierra Leone Iron Ore, Sintering, TG-DSC

References

[1] L. Lu, R. J. Holmes and J. R. Manuel: ISIJ Int., Vol. 47(2007), p.349.

[2] C. E Loo and W. Leung: ISIJ Int., Vol. 43(2003), p.1393.

[3] Y. Yamaoka, S. Nagaoka, Y. Yamada and R. Ando: Trans. Iron Steel Inst. Jap., Vol. 14(1974), p.185.

[4] Jinlian Li, Wanshan Liu, Yanru Li, Wei Ren and Mingshun Zhou: Iron&Steel, Vol. 46(2011), p.19"In Chinese.

[5] K. J. D. Mackenzie, J. Temuujin and K. Okada: Thermochim. Acta, Vol. 327(1999), p.103.

[6] E. Kasai and F. Saito: ISIJ Int., Vol. 36(1996), p.1109.

[7] Xingmin Guo, Yunmao Zhang, Mei Zhang, Huaigong Guo, Haiting Shang and Qiangzhi Li: Iron & Steel, Vol. 39(2004), p.34"In Chinese.

[8] VDEh: Slag Atlas, 2nd Ed., Verlag Stahleisen GmbH, Düsseldorf, (1995), p.58.

[9] N. V. Y. Scarlett, M. I. Pownceby, I. C. Madsen and A. N. Christensen: Metall. Mater. Trans. B, Vol. 35(2004), p.929.