Here's some lyrics, but I can't find a title (or composer) anywhere. Does is ring any bells?   

As long as the smoke goes upward
So long will I love you dear
All day long mid the factory's din
I'm longing to have you near
I can see your face in the Twilight
as I look at the glowing heat
and the sound of each blow on the anvil
Seems to ring out your name so sweet