A coke oven is an hollow 3*3 structure made with Coke oven brick .
You can make this from 26 of these bricks, each requiring 4 bricks and 5 sand.
That means you need 130 sand and 104 bricks. That's 2 stacks + 2 blocks of sand and 1 stack and 40 bricks.To get rid of the creosote, you have to place a bottle or bucket in the upper right slot.
you use a coke oven by putting coal on the left side.
Coke will come out next to the arrow. You collect the Creosote oil by putting a bucket or glass bottles (of which you can stack) in the top right.