I do agree it needs some more polish and "umph". There are still some items left on the out-of-scope sheet to implement, so maybe that will help some.
So for the smelter in the corner it will only dispense one at a time, but they will stay queued up~ in other words you could put 20 scraps in the smelter and have 10 ingots in there, but only one will dispense at a time. Once you pick up the ingot, it dispenses another.
The furnaces however will melt the ingot if it is still in the furnace some time after being white hot.
Thanks for all the feedback, and for playing!