Translations:Coke/11/en
From Vintage Story Wiki
To produce coke, the player needs a specific coke oven that can be build using either fire clay bricks or refractory bricks of any tier. Note that none of the blocks will take damage in the process, regardless of their heat resistance. Depending on how much fire clay or other materials the player has, it might be more efficient to build out of fire clay bricks or out of refractory bricks.
Furthermore, the oven needs to be closed by a coke oven door, which is a smaller iron door.