Yes, don't forget to have the book "in mind".
Also, use the furnace on the side of Harnquist's shop, not the one right by him. I tried the furnace right by him, and 7 ores in a row turned to dust.
Also, just to let you know:
I have all the training but can't put it to use as the iron just turns to dust. When I put the iorn in the furnace a message pops up that says something like - you do not know what is going to happen to the iron.
It actually says Doing, heh. (I know, shut up Archon...)