STEEL GRIPS online - Influence of coking time on coke quality from non-recovery vibro-compacting coke ovens

STEEL GRIPS online
ISSN 1866-8453

Last updated:
________________
Feb 3, 2012

Search STEEL GRIPS

from TOP

Peddolla Prachethan Kumar, Abhi Kinlekar, Sagar Chandra Barman and Mallikarjuna Kurba:
Influence of coking time on coke quality from non-recovery vibro-compacting coke ovens

Vibro-compacted non-recovery coke ovens, coke quality, coking time, inferior coals, carbonisation time, coke reactivity index (CRI) and coke strength after reaction (CSR)

Coke quality depends on the quality of coal or its blend, coking parameters and pre-carbonisation techniques, if any. JSW Steel has adopted vibro-compaction pre-carbonisation technique, along with non-recovery ovens, having a capacity to produce 1.2 million t/a of coke. Coking conditions are determined majorily by coking time and oven temperatures, etc. Coking time is the most important parameter of coking conditions and plays a significant role on coke quality. The coking conditions are determined, to a great extent, by the quality of coal blend used, especially the volatile matter (VM) and the coking properties. Plant scale trials were conducted by varying coking time on different coal blends to study its effect on the process and coke quality. The experiments at vibro-compacted non-recovery coke ovens revealed that coking time influences the coke quality and depends on the quality of the coal blend. The high temperature properties, coke reactivity index (CRI) and coke strength after reaction (CSR), improved with longer carbonisation time in case of coal blends with inferior coals in the blend.