Characterization of Ajaokuta Coke for Blast Furnace Ironmaking

A.O.  Adeleke; R.S.  Makan; S.A.  Ibitoye

doi:10.4236/jmmce.2006.52011

A.O. Adeleke^*, R.S. Makan, S.A. Ibitoye

Abstract: The 300kg coke sample received from Ajaokuta Steel Plant was subjected to proximate analysis and pilot scale size distribution test. The proximate analysis showed that the coke contains 0.38%, 13.45%, 2.72% and 0.14% of moisture, ash, volatile matter and sulphur respectively; while size distribution test gave micum 10 and micum 40 of 3.62% and 89.67% respectively. Therefore, the coke satisfies the blast furnace requirements for moisture, sulphur and micum strength. However, its ash and volatile contents exceed the specified limits except for Indian standard practice.

Keywords: Coke, proximate analysis, size distribution, micum strength

Cite this paper: A. Adeleke, R. Makan and S. Ibitoye, "Characterization of Ajaokuta Coke for Blast Furnace Ironmaking," Journal of Minerals and Materials Characterization and Engineering, Vol. 5 No. 2, 2006, pp. 155-165. doi: 10.4236/jmmce.2006.52011.

References

[1] Loison, R., Foch, P. and Boyer, A., 1989, Coke quality and production, Butterworth, London.

[2] National Metallurgical Development Centre (NMDC) manual for pilot scale coke over plant, 1994, Jos, Nigeria.

[3] Moitra, A.K., Banerjee, N.G. Shrinkhande, K.Y., Sing, K. Raja, K. and Banerjee, S (1992): Studies on coal carbonization in India, Central Fuel Research Institute (CFRI) publication, Calcutta.

[4] Federal Ministry of Mines, Power and Steel circular, 1992, on Carbonization tests for Ajaokuta coke requirements, Lagos, Nigeria.

[5] Task force, 1987, on the maximum utilization of Nigerian coals at the Ajaokuta Steel Plant, Lagos, Nigeria.

[6] Anderson, D.F., 1992, “Trends in demand for and supply of coal and coke”, 2^nd international cokemaking congress, London, pp. 9.

[7] Garin, J., Pol, F. and Poulet, Ph., 1987, “Coal selection and blending practice at the USINOR coke oven plant”, 1st international cokemaking congress, Essen, section III. 2.

[8] Brouwer, R. C., Schoone, E.E. and Toxopeus, H.L., 1992, “Coal Injection driven to the limits”, Iron and Steel Engineer, Vol. 69, No 12, pp. 22.

[9] Zhan, X. and Xu, C., 1987, “The behaviour of coke by use of titaniferrous magnetite in blast furnace’, 1st international cokemaking congress, Essen, Section 12.

[10] Weskamp, W., Rhode, W., Stewen, E., and Habermehl, D., 1987, “Greater coke strength through reactive additives to coking blends”, 1st International Cokemaking Congress, Essen, Section III. I.

[11] Willmers R.R. and Bennington, C.R., 1992, “Coke quality requirements for efficient, high productivity blast furnace operation at high coal injection rates”, 2^nd international coke making congress, London, pp. 275.

[12] Rollason, E.C., 1973, Metallurgy for Engineers, The English Language Book Society and Edward Arnold Publisher.

[13] Echterhoff, J., Killich, H.J. and Frick, H., 1992, “Production of blast furnace coke by stamp charging and utilization of recycled coke breeze”, 2^nd international cokemaking congress, London, pp. 188.