smelter at falkreath, it is behind/ around back of the blacksmiths shop... behind his porch that has the forge and other tools.
smelter at solitude, replaces some decorative logs.
smelter at Riften, it is near this doorway to the exit of town, right near the blacksmith, by that chopping block. the placement is a bit weird, but i dont have much empty space to work with... (its sorta in the wall) but it works. ...also the wood c...