Abstract
Coke plays a major role in blast-furnace operation. Quality of coke mainly depends upon the coal used in blend. As the reserve of good coking coal is diminishing, at this point of time, it is important to give emphasis on coal-preparation techniques. Keeping this in mind, this article presents a coal-preparation technique named “differential screening” based on a selective crushing principle. Different types of indigenous and imported coals are characterized and screened in different size fractions. These size fractions are again characterized and carbonization tests are designed based on their properties under stamp-charging condition. This research suggests that the use of a specific fraction of coal in the blend in order to achieve the higher coke strength after reaction (CSR).
Acknowledgements
The authors are grateful to Tata Steel for permission to publish this paper. Authors would like to thank Dr. Rashmi Singh for her contribution in petrographic analysis.