This will make the whole smithing thing kinda easy, but here goes:
In the far southeast of skyrim there's a dwemer ruin. If you go inside, it tells you that you need the key, but luckily you don't need to go there. Near the main building is a smaller building, which is a storage building. Inside are lots of ingots, and enough other resources so that you can end up with 30+ dwarven metal ingots after smelting.
some more details plz. i went to the south east corner and all i found was stendarrs beacon, forelhost, broken helm hollow and black briar lodge.
forelhost requires a key but there was no small building there, and there was a guy giving me a quest there to open the place up. am i on the right track?