Coal coke is a material obtained by processing
coal in a redstone
furnace with pyrolytic
conversion installed. It can be used as
fuel, or as an ingredient to produce steel.
Redstone Furnace with Pyrolytic Conversion
When used as fuel in a furnace, one
piece of coal coke lasts 160 seconds, which is enough to smelt up to 16 items.
It lasts twice as long as regular coal.
Induction Smelter ingredient