Coke Forge with Horse Shoe Published September 21, 2018 at 640 × 427 in No Bullshit Guide To The 10 Best Blacksmithing Forge Fuels ← Previous Heating a horse shoe in a coke fueled forge. Image Source Heating a horse shoe in a coke fueled forge. Image Source Coke is the result of burning coal in a low air environment. Coke is an extremely efficient fuel source for blacksmithing forges.