Add double stone, steel and electric furnaces, able to smelt iron ore directly into steel. Add stone and steel electric furnace. Add a 3*3 furnace powered by fuel with 2 module slots.
Mods introducing new content into the game.
Add double stone, steel and electric furnaces, able to smelt iron ore directly into steel. Add stone and steel electric furnace. Add a 3*3 furnace powered by fuel with 2 module slots.
Check double furnace (https://mods.factorio.com/mod/DoubleFurnace) and electric furnaces (https://mods.factorio.com/mod/Electric%20Furnaces) mods.