When you first crash land on the alien planet inFactorio, you’ll have to slowly set up machines to help you survive, automating the process to save on time wherever possible. One of the first early-game structures you’ll build is a smelting array to quickly turn ore into plates that can then be used for a variety of different recipes.

The process of smelting items is rather straightforward, but Factorio is all about efficiency, and if you want to efficiently turn your ore into plates, you’ll want to plan accordingly. Below, we’ll take a look at how to set up a smelting array to promote automation and efficiency.

A beginner smelter setup using furnaces, belts, and inserters.

How To Set Up A Smelting Array

A smelting array is a simple structure of Belts, Inserters, and smelting furnaces thatturns a line of ore and coal into plates. There are many different ways to build a smelting array, but the most popular is asymmetrical line of two rows of furnaces, with items beingfed from the top and bottomof either row into the furnaces.

The furnaces thenproduce the item and send it into a consolidated Belt linein the center of the structure, which can then be transported elsewhere for use.

This design can easily be expanded by simplyextending the entire structure.

The key to keeping everything compact in this design is tohave the coal and ore on the same belt, so that one Inserter can take both the coal and ore needed for a single furnace. This is done usingtwo Splitters on a diverging path, one on the left and one on the right, each containing the two resources necessary. This will place the coal and iron on the left or right side of the Belt.