Characterization of Preparing Cold Bonded Carbon Bearing Pellets of Metallurgical Dust for Direct Reduction

Abstract:

This paper involves the preparation of cold bonded carbon bearing pellets of metallurgical dust for direct reduction using binder. Investigation reveals that the binder is of vital concern to the preparation of cold bonded carbon bearing pellets. For agglomeration these metallurgical dust, quick lime displays excellent adhesive ability. The strength of pellets with addition 10% quick lime and mixing 9% moisture content after 2 h dried are about 700 N and over 20 times respectively, which is enough to charge the composite pellets into rotary hearth furnace or rotary kiln. In cold bonding, the (3, 3) simplex lattice method was used to find a blend of binders that would result in optimum mechanical properties. Pellets were made up by composite binders, in which quick lime content within the range from 5 to 10%, bentonite content within the range from 0 to 2% and X from 0 to 0.7% possessing the CSP and DSP higher than 300 N, 11 times respectively, from the models of the mechanical properties.

• Periodical: Advanced Materials Research (Volumes 734-737)
• Pages: 1540-1546
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.734-737.1540
• Online since: August 2013
• Authors: Jin Shui Zuo, Cheng Bo Wu, Zhi Yuan Kang, Jie Lei, You You He
• Keywords: Binder, Cold Bonding, Composite Pellet, Dust, Simplex Lattice Method

References

[1] Cui Peng, Zhang Fuli, Li Huifang, et al. Removal Behavior of Zn, Pb, K and Na from Cold Bonded Briquettes of Metallurgical Dust in Simulated RHF [J]. Isij International, 2009, 49(12): 1874.

DOI: 10.2355/isijinternational.49.1874

[2] R. Sah, Dutta S. K. Effects of Binder on the Properties of Iron Ore-Coal Composite Pellets [J]. Mineral Processing and Extractive Metallurgy Review, 2010, 31(2): 73.

DOI: 10.1080/08827500903404732

[3] Hsin-Chien Chuang, Fu Jian-Xun, Hwang Weng-Sing, et al. Effects of the Composition of Residual Materials from Steelwork on the Crushing Strength of DRI [J]. Steel Research International, 2012, 83(1): 5.

DOI: 10.1002/srin.201100154

[4] Rufei Wei, Li Jiaxin, Tang Guangwu. Strength and Consolidation Mechanism of Green Pellets Containing Carbon [M]//ZHU H X, WANG L J. Advances in Metallurgical and Mining Engineering. 2012: 215.

[5] G. Z. Qiu, Jiang T., Huang Z. C., et al. Characterization of preparing cold bonded pellets for direct reduction using an organic binder [J]. Isij International, 2003, 43(1): 20.

DOI: 10.2355/isijinternational.43.20

[6] M. C. Mantovani, Takano C. The strength and the high temperature behaviors of self-reducing pellets containing EAF dust [J]. Isij International, 2000, 40(3): 224.

DOI: 10.2355/isijinternational.40.224

[7] S. Dwarapudi, Rao S. M., Murthy J. V. S. N., et al. Effect of activated bentonite on properties of green and fired chromite pellets [J]. Ironmaking & Steelmaking, 2008, 35(4): 308.

DOI: 10.1179/174328108x295721

[8] M. C. Mantovani, Takano C., Buchler P. M. Electric arc furnace dust-coal composite pellet effects of pellet size, dust composition, and additives on swelling and zinc removal [J]. Ironmaking & Steelmaking, 2002, 29(4): 257.

DOI: 10.1179/030192302225004494

[9] Guanzhou Qiu, Jiang Tao, Xu Jangcang, et al. Direct Reduction of cold-bonded pellets [M]. Changsha: Central South University Press Publicaations 2001.

[10] Y. M. Balychev, Tkachenko F. K. USE OF THE METHOD OF EXPERIMENT PLANNING TO INVESTIGATE THE MECHANICAL-PROPERTIES OF MANGANESE STEELS [J]. Metal Science and Heat Treatment, 1984, 26(11-1): 901.

DOI: 10.1007/bf00801004

[11] V. L. Karasik, Kotkina T.V.SELECTING SILICON-CARBIDE CONCRETE COMPOSITIONS WITH PREDETERMINED PROPERTIES [J]. Refractories, 1985, 26(9-10): 532.

DOI: 10.1007/bf01386462

[12] Meng Shao, Liu Zhu-qing, Li Dong, et al. Thermal Properties of Polyurethane Films Prepared from Mixed Cellulose, Hemicelluloses and Lignin [J]. International Journal of Food Engineering, 2012, 8(4):

DOI: 10.1515/1556-3758.1935

[13] Dipayan Das, Mukhopadhyay Samrat, Kaur Harpreet. Optimization of fiber composition in natural fiber-reinforced composites using a simplex lattice design [J]. Journal of Composite Materials, 2012, 46(26): 3311.

DOI: 10.1177/0021998312437801

[14] Young Seok Lee, Ri Deok Won, Yi Sang Ho, et al. Relationship between the Reduction Degree and Strength of DRI Pellets Produced from Iron and Carbon Bearing Wastes Using an RHF Simulator [J]. Isij International, 2012, 52(8): 1454.

DOI: 10.2355/isijinternational.52.1454