Three-dimensional structure and micro-mechanical properties of iron ore sinter

ժҪ
ͼ/��
�ο��
�� (15)

ȫ��: PDF (0 KB) HTML (1 KB)
��: BibTeX | EndNote (RIS)

ժҪ A new analysis method based on serial sectioning and three-dimensional (3D) reconstruction was developed to characterize the mineral microstructure of iron ore sinter. Through the 3D reconstruction of two types of iron ore sinters, the morphology and distribution of minerals in three-dimensional space were analyzed, and the volume fraction of minerals in a 3D image was calculated based on their pixel points. In addition, the microhardness of minerals was measured with a Vickers hardness tester. Notably, different mineral compositions and distributions are obtained in these two sinters. The calcium ferrite in Sinter 1 is dendritic with many interconnected pores, and these grains are crisscrossed and interwoven; the calcium ferrite in Sinter 2 is strip shaped and interweaves with magnetite, silicate and columnar pores. The calculated mineral contents based on a two-dimensional region are clearly different among various layers. Quantitative analysis shows that Sinter 1 contains a greater amount of calcium ferrite and hematite, whereas Sinter 2 contains more magnetite and silicate. The microhardness of minerals from highest to lowest is hematite, calcium ferrite, magnetite and silicate. Thus, Sinter 1 has a greater tumbler strength than Sinter 2.

	��

	�ѱ��Ƽ��
	��ҵ��
	��ù��
	E-mail Alert
	RSS
	��
	��
	��
	��

�ؼ�� �� Iron ore sinter, mineral, microstructure, three-dimensional analysis, tumbler strength

Abstract��A new analysis method based on serial sectioning and three-dimensional (3D) reconstruction was developed to characterize the mineral microstructure of iron ore sinter. Through the 3D reconstruction of two types of iron ore sinters, the morphology and distribution of minerals in three-dimensional space were analyzed, and the volume fraction of minerals in a 3D image was calculated based on their pixel points. In addition, the microhardness of minerals was measured with a Vickers hardness tester. Notably, different mineral compositions and distributions are obtained in these two sinters. The calcium ferrite in Sinter 1 is dendritic with many interconnected pores, and these grains are crisscrossed and interwoven; the calcium ferrite in Sinter 2 is strip shaped and interweaves with magnetite, silicate and columnar pores. The calculated mineral contents based on a two-dimensional region are clearly different among various layers. Quantitative analysis shows that Sinter 1 contains a greater amount of calcium ferrite and hematite, whereas Sinter 2 contains more magnetite and silicate. The microhardness of minerals from highest to lowest is hematite, calcium ferrite, magnetite and silicate. Thus, Sinter 1 has a greater tumbler strength than Sinter 2.

Key words�� Iron ore sinter mineral microstructure three-dimensional analysis tumbler strength

�ո��: 2016-10-27 ��: 2017-10-18

��ñ��:

Wei Wang,,Ming Deng,,Run-sheng Xu,,Wei-bo Xu,,Ze-lin Ouyang,,Xiao-bo Huang,,Zheng-liang Xue,. Three-dimensional structure and micro-mechanical properties of iron ore sinter[J]. �й��ڿ��, 2017, 24(10): 998-1006. Wei Wang,,Ming Deng,,Run-sheng Xu,,Wei-bo Xu,,Ze-lin Ouyang,,Xiao-bo Huang,,Zheng-liang Xue,. Three-dimensional structure and micro-mechanical properties of iron ore sinter. Chinese Journal of Iron and Steel, 2017, 24(10): 998-1006.

��ӱ��:

http://gt.chinamet.cn/Jweb_gtyjxb_en/CN/ �� http://gt.chinamet.cn/Jweb_gtyjxb_en/CN/Y2017/V24/I10/998

[1]	V. Shatokha, I. Korobeynikov, E. Maire and J. Adrien, Ironmaking & Steelmaking, 36(2009) 416-420.
[2]	X. Fan, Z. Ji, M. Gan, X. Chen, Q. Li, and T. Jiang, Ironmaking & Steelmaking, 43(2016) 5-10.
[3]	Z. Liu, M. Chu, H. Wang, W. Zhao, and X. Xue, Int. J. Miner. Metall. Mater., 23(2016) 25-32.
[4]	X. Guo, L. Zhu, Q. Li, H. Shen, and M.Zhou, Iron and Steel, 42(2007) 17-19. (in chinese)
[5]	Z. Xiao, H. Liu, Z. Xue, and Z. Wen, Journal of Iron and Steel Reasearch, 27(2015) 18-24. (in chinese)
[6]	X. Fan, Z. Zhao, X. Chen, M. Gan, and Y. Wang, Journal of Central South University (Science and Technology) , 42(2011) 2893-2897. (in chinese)
[7]	X. Lv, C. Bai, G. Qiu, M. Hu, and S. Zhang, ISIJ Int., 48(2008)186-193.
[8]	X. Lv, C. Bai, G. Qiu, S. Zhang, and M. Hu, ISIJ Int., 49(2009) 709-718.
[9]	C.Wang, L. Liang, B.Wang, Journal of Shenyang Universiy, (2003) 25-26. (in chinese)
[10]	V. Shatokha, I. Korobeynikov, E. Maire,G. IIard, and J. Adrienron, Ironmaking & Steelmaking, 37(2010) 313-319.
[11]	V. Shatokha, Sintering-Methods and Products, Publisher: InTech, (2012) 215-231.
[12]	E. Kasai, W J Rankin, R R Lovel, and Y. Omori, ISIJ Int., 29(1989) 635-641.
[13]	S. Kasama, T. Inazumi, and T. Nakayasu, ISIJ Int., 34(1994) 562-569.
[14]	M. Nakano, T. Kawaguchi, S. Kasama, T. Inazumi, J. Torii, and T. Nakano, ISIJ Int., 37 (1997) 339-344.
[15]	L. Cheng, K. Wu, X. Wan, and G. Zhang, J. Iron. Steel Res. Int., 27(2014) 964-968.
[16]	K. Wu, Acta Metalluergical Since, 41(2005) 1237-1242.(in chinese)
[17]	X. Wan, H. Wang, L. Cheng, and K. Wu, Mater. Charact., 67(2012) 41-51.
[18]	X. Wan, R. Wei, and K. Wu, Mater. Charact., 61(2010) 726-731.
[19]	X. Wan, L. Cheng, and K. Wu, J. Iron. Steel Res. Int., 17(2010) 49-53.
[20]	X. Wan, L. Cheng, and K. Wu, Met. Mater. Int., 16(2010) 865-870.
[21]	B. Yang, A. Wu, X. Miao, and J. Liu, Transactions of Nonferrous Metals Society of China, 24(2014) 833-838.
[22]	N.Chawla, R.S. Sidhu, V.V. Ganesh, Acta Mater., 54(2006) 1541-1548.
[23]	K. Hiraki, Y. Yamazaki, T. Kanai, A. Uchida,Y. Saito,Y. Matsushita, H. Aoki, T. Miura, S. Nomura and H. Hatashizaki, ISIJ int., 52(2012) 1966-1972.
[24]	R. Oyama, C. Isurugi, S. Tanaka, T. Fukagawa, I. Nakayama, Y. Sasaki, T. Kanasugi, A. Kikuchi, T. Sugiyama, Placenta,10(2014) A10-A11.
[25]	J. Egger, T. Kapur, A. Fedorov, S. Pieper, J. V. Miller, H. Veeraraghavan, B. Freisleben, A. J. Golby, C. Nimsky, and R. Kikinis, Sci. Rep., 3(2013) 335-366.
[26]	A. Fedorov, R. Beichel, J. Kalpathy-Cramer, J. Finetd, J. Fillion-Robind, S. Pujola, C. Bauerb, D. Jenningsc, F. Fennessya, M. Sonkab, J. Buattib, S. Aylwardd, J. V. Millere, S. Pieperf, R. Kikinis, Imaging, 30(2012) 1323-1341.
[27]	Z. Ying, L. Xu, M. Jiang, Y. Shen, J. Iron. Steel Res. Int., 18(2006) 55-58.
[28]	R.Wang, Sintering and Pelletting, 20(1995) 9-13. (in chniese)
[29]	Y. Yan, Sintering and Pelletting, 38(2013) 7-12. (in chinese)
[30]	S. Wang, X. Bi, WISCO Technology, 47(2009) 19-22. (in chinese)