Pelletisation Behavior of Fluxed Iron Ore Pellets of Varying Basicities Made with Waste Fines

Alok Sarkar, Arup Kumar Mandal, O. P. Sinha


DOI: https://doi.org/10.12777/ijse.5.2.9-14

Abstract


The present study deals with the utilization of fines generated from comminution process (crushing, grinding and screening) of the Run of Mines into value added products i.e. fluxed iron ore pellets. The study comprises to understand the physical and mechanical behavior of five distinguished chemical compositions of green and dried iron ore pellets with respect to a typical Mini Blast furnace (MBF) burden data and furnace operating parameter. The maximum basicity of pellets was calculated 2.37 to make slag neutral when blast furnace runs at 100% high ash coke (avg. ash content= 29%). The crushing strength and drop number of various green pellets were measured. Green Crushing Strength was decreased with increasing lime fines. The addition of lime fines as a burnt lime, which has acicular structure creates less plasticity and brittle like fracture occurred. Due to formation of hard CaCO3 layer on the surface, after increasing lime contain crushing strength was increased in the air and oven dry pellets with respect to acid pellet (0% lime fines addition).

[How to cite this article: Sarkar, A., Mandal, A.K., and Sinha, O.P. (2013) Pelletisation Behavior of Fluxed Iron Ore Pellets of Varying Basicities Made with Waste Fines. International Journal of Science and Engineering, 5(2),9-14. Doi: 10.12777/ijse.5.2.9-14]

 


Keywords


Agglomeration, Crushing strength, Burnt Lime, Fluxed Pellets, Waste Fines

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References


. BFI Production, (2012); http://www.worldsteel.org/statistics/BFI-produ ction.html

. Biswas, A. K. (1981). Principles of Blast Furnace Iron Making, 1 st edition, SBA publication, Kolkata, ISBN 0-949917-08-7: pp 496.

. Crude Steel Production, (2012); http://www.worldsteel.org/statistics/ crude-steel-production.html

. De Souza, R.P., De Mendonca, C.F., Kater, T., (1984). Production of acid iron ore pellet for direct reduction using an organic binder. Mining Eng. Magn. 36(10): 1437-1441

. DRI Production, (2012); http://www.worldsteel.org/statistics/DRI-produ ction.html.

. EBR, (2010). A report on the environmental benefits of recycling- a critical review of the data for steel’. Steel Times International. Redhill. UK ; http://www.bir.org/assets/PressCuttings/CoverageSteelTimes.pdf.

. Firth, A.R., Garden, J.F., Douglas, J.D, (2008). Phase Equilibria and Slag Formation in the Magnetite Core of Fluxed Iron Ore Pellets. ISIJ International.48(11): 1485-1492; http://dx.doi.org/10.2355/isijinternation al .48.1485.

. Gupta, R.C., (1999). Alternative routes of Iron and Steel making (ICARISM-99). Proceeding on International Conference on The AUSIMM and CSIR Minerals, Waterford, pp 59

. Gupta, R.C., (2010). Theory and Laboratory Experiments in Ferrous Metallurgy. PHI Learning. New Delhi: ISBN 978-81-203-3924-8: pp 77.

. India Minerals Yearbook, (2011). (Part- II),50th Edition. iron ore,(advance release),government of India, ministry of mines, Indian Bureau of Mines, Nagpur ; http://ibm.nic.in /imyb%202011_iron%20ore.pdf

. Kaushik, P. Fruehan, R.J., (2006a). Mixed burden softening and melting phenomena in blast furnace operation. AISTech proceedings, Vol. 1: pp 319-332; ISBN: 978-1-886362-85-7

. Kaushik, P., Fruehan, R.J., (2006b). Behaviour of DRI and HBI in the upper blast furnace shaft: Evoluation of morphological structure of Iron. AISTech Proceedings, Vol 1: pp 51-59

. Kunitomo, K., Takamoto, Y., Fujiwara, Y., Onuma, T., (2006). Blast furnace iron making process using pre-reduced iron ore. Nippon Steel Technical Report, No. 94, pp 133-138, UDC 669. 162. 26: 622. 341. 1-18; http://dc307.4shared.com/doc/wmc2I2AH/preview .html.

. Mandal, A.K., Sarkar, A., Sinha, O.P., (2012). Conversion of solid waste fines of comminution process into feeding material of Blast Furnace grade iron ore pellets. SGAT Bulletin, 139(2): 95-113; ISSN 0972-2173.

. Nogami, H., Yagi, J., Kitamura, S., Austin, P. R., (2006). Analysis on material and energy balances of Iron Making systems on Blast furnace Operations with Metallic Charging, Top gas recycling and natural gas injection. ISIJ International, 46(12): 1759-1766; http://dx.doi.org/10.2355/isijinternational.46.1759

. Pal, J., Ghorai, S., Singh, D. P., Goswami, M. C, Bandyopadhyay, D. & Ghosh, D., (2011). Dissolution Characteristics of CO2-Treated Fluxed Pellets in Hot Metal Bath. Mineral Processing and Extractive Metallurgy Review. 32(4): 229-246; DOI:10.1080/08827508.2010.53071

. Patil, J. B., Kakkar, N. K., Srinivasan, T. M., Dharanipalan, S., Patel, B. B., Nayak, N. M., (1980). Production of cold bonded pellets. Transaction of the IIM, 33(5): 382-390

. Sakamoto, N., Noda, H., Saito, Y.H., Miyashita, T., (1988). Fundamentals investigation of new iron ore agglomerates and evaluation of their properties for the blast furnace. Transactions ISIJ, 28: 621-627; https://www.jstage.jst.go.jp/article/isijinternational1966/28/8/28_8_619/_pdf.

. Schriefer, J., (1995). Alternative irons for Electric and Blast Furnaces. New Steel. 11(2), pp 16-19.

. Tang Ma, (1999). Injection of fluxed in to the blast furnace via tuyers for optimizing slag formation, ISIJ International. 39 (7): 697-704; http://dx.doi.org/10.2355/isijinternational.39.697

. UK Minerals Yearbook, (2006). lime stone; www.mineralsuk.com/britmin/ ukmy2006.pdf .

. Umadevi, T., Kumar, P., Lobo, N. F., Prabhu, M., Mahapatra, P.C., Ranjan, M., (2011). Influence of Pellet Basicity (CaO/SiO2) on Iron Ore Pellet Properties and Microstructure. ISIJ International, 51(1): 14-20; http://dx.doi.org/10.2355/isijinternatio nal.51.14




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