Abstract
India is having limited resources of coking coal, an essential input for production of iron and steel especially through blast furnace route. The coking coal sources are presently from the lower seams of Jharia coalfield, which are high in ash content and low in volatile matter and difficult to wash. This paper describes the washability characteristics of a typical coking coal from the Eastern and Western Jharia coalfields aiming at 18% ash level in the clean coal mainly to meet the specifications of coke making for blast furnace use. Conventional float-and-sink testing was used to determine the yield of clean coal for the coarser fraction, while the coal fines was subjected to flotation. The theoretical recovery of clean coal for the coal tested from Eastern and Western Jharia coalfields are 27% and 19.7% at the stipulated ash content. The coking propensities and the petrographic analysis of the clean coal strongly support its use for coke making either directly or as a blend with imported coal.
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ACKNOWLEDGMENTS
The authors are thankful to The Director, CIMFR for permitting to publish this paper in the Journal. They are also thankful to the entire team of Coal Preparation Division at CIMFR, Digwadih Campus for their cooperation, help and support rendered from time to time.
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Chattopadhyay, U.S., T. Gouri Charan Utilization of High Ash, Low Volatile Coking Coals of Jharia Coalfield, India for Coke Making. Coke Chem. 64, 12–17 (2021). https://doi.org/10.3103/S1068364X21010026
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DOI: https://doi.org/10.3103/S1068364X21010026