OJMetal  Vol.2 No.2 , June 2012
A Novel Technique for Determination of Flow Characteristics of Blast Furnace Slag
ABSTRACT
A study of flow characteristics of blast furnace slag helps determine its softening and flow (liquid-mobility) temperatures. The slag with a narrow difference between the two temperatures is termed a “Short Slag”. Its formation ensures higher rates of slag-metal reactions with the trickle of the slag soon after its formation exposing fresh mass for faster reactions, the trickling slag, creating fresh interfaces facilitating slag-metal exchanges. In the present work, a novel technique is adopted to determine the flow characteristics of blast furnace slag obtained from different industrial blast furnaces. It is seen that the results so obtained agree very closely with the values obtained from adopting conventional methods of determining the liquidus temperature using “slag atlas”. It is observed that under the range of compositions studied a high C/S ratio combined with a high MgO content in the slag is beneficial to the B.F. process as it renders a “short slag”.

Cite this paper
S. Dash, N. Mohanty, U. Mohanty and S. Sarkar, "A Novel Technique for Determination of Flow Characteristics of Blast Furnace Slag," Open Journal of Metal, Vol. 2 No. 2, 2012, pp. 42-47. doi: 10.4236/ojmetal.2012.22007.
References
[1]   P. F. Nogueira and R. J. Fruehan, “Blast Furnace Burden Softening and Melting Phenomena: Part 1. Pellet Bulk Interaction Observation,” Metallurgical and Materials Transactions B, Vol. 35B, 2004, p. 829.

[2]   P. Kaushik and R. J. Fruehan, “Mixed Burden Softening and Melting Phenomena in Blast Furnace Operation Part 1. X-Ray Observation of Ferrous Burden,” Ironmaking & Steelmaking, Vol. 33, No. 6, 2006, pp. 507-519. doi:10.1179/174328106X118107

[3]   G. Clixby, “Softening & Melting of Super Fluxed Sinters and Acid Pellets,” BSC, Ironmaking Session, Tesside Laboratories, International Report, 1979.

[4]   Yu. M. Potebnya, S. A. Gaurilko, I. A. Stroitelav, V. L. Tolstunov and L. V. Getmanova, “Influence of Phase Composition and Basicity on the Softening Temperature Range of Sinter,” Steel USSR, Vol. 3, No. 10, 1973,

[5]   German Industrial Standard 51730.

[6]   P. A. Taskanen, S. M. Huttunen, P. H. Mannila and J. J. Harkki, “Experimental Simulations of Primary Slag Formation in Blast Formation,” Ironmaking & Steelmaking, Vol. 29, 2002, pp. 281-286. doi:10.1179/030192302225005141

[7]   P. K. Roy, U. N. Mishra and S. Pal, “High Temperature Properties of Iron Bearing Materials and Their Influence on Blast Furnace,” R&D Centre for Iron and Steel, SAIL, Ranchi.

[8]   F. M. Shen, X. Jiang, G. S. Wu, G. Wei, X. G. Li and Y. S. Shen, “Proper MgO Addition in Blast Furnace Operation,” ISIJ International, Vol. 46, No. 1, 2006, pp. 65-69. doi:10.2355/isijinternational.46.65

[9]   Slag Atlas

[10]   U. K. Mohanty, “Thermo Physical Properties of Some Metallorthermic Slags,” Ph.D. Dissertation, R.E. College, Rourkela, 1998.

[11]   R. C. Behera, U. K. Mohanty and A. K. Mohanty, “Viscosity and Constitution of Slags Associated with Metallothermic Extraction of Some Less Common Metals,” High Temperature Materials and Processes, Vol. 9, 1990, pp. 57-75. doi:10.1515/HTMP.1990.9.2-4.57

[12]   V. K. Gupta and V. Sheshadri, “Studies on High Alumina Blast Furnace Slags,” Transactions of Indian Institute of Metals, Vol. 26, 1973, pp. 55-64.

[13]   R. N. Singh, “Viscosity Measurements of High Alumina B.F. Slags,” Steel India, Vol. 7, 1984, pp. 73-83.

 
 
Top