Refined Iron Dust
Iron Ore and one Coal at the same time into an Rotary Macerator. This will produce 2 Refined Iron Dust.
Note: During this process, 1 Coal will be used for every 64 Iron ore macerated.
Refined Iron Dust can be smelted into Refined Iron. This method of obtaining Refined Iron skips a smelting process, saving time at the cost of Coal.