Changes in granulometric composition of blast-furnace coke

The basic requirements on the granulometric composition of blast-furnace coke are considered. The change in granulometric composition over time is considered for the example of Krivoi Rog coke plant (now the coke-production facility at PAT ArcelorMittal Krivoi Rog). Recently, the size classes in the gross coke produced have been redistributed, with increase in the content of the >80 mm, <25 mm, and 80–60 mm classes; coke quality (in terms of the strength M ₂₅ and ease of wear M ₁₀) has also declined. To obtain more uniform granulometric composition, consistent mechanical treatment of the coke is required.