Wiki Q&A

To turn ore into ingots, stand within 2 tiles of a forge and double-click the ore to smelt it [1]. Smelting produces 2 ingots per ore [1]. Forges can be found in towns, caves, or player houses [2]. You cannot smelt ore that you do not have sufficient Mining skill to mine yourself [1]. You may also smelt ore that is on a Pack Animal if you are within 2 tiles of a forge [1].