Factorio Prints: Beaconized Iron Ore to Steel (2400/min)
end-game iron/copper and steel smelting (non-smart) - Factorio Forums
Factorio": How to Build a Furnace/Smelting Setup - LevelSkip
Easy Steel - Factorio Forums
Design / Blueprint] Stone/Steel furnace block design suitable for early and mid-game. This design is intended to achieve maximum compression in 0.16, after the loss of the underground belt compression trick. :