Electric Furnace

Electric Furnace automatically smelts 2 ores into 1 bar (e.g. Iron Ore into Iron Bar) and has a small chance to produce additional materials. Its speed is 1 operation per second.

It can only smelt ores of tier 1-4. Later in the game it gets replaced by Blast Furnace, which can smelt tier 5 ores and produces more additional materials.