Does the infernal furnace produce extra nuggets on dartcraft chunks? I have yet to see it do so with TE3 pulverized metals - my current method of choice although that's because I know TE and haven't explored other options yet.
The Infernal Furnace won't produce nuggets from dusts that are registered in the Ore Dictionary to prevent Dust -> Ingot -> Dust infinite feedback loops. However, Dartcraft dusts and chunks are not registered as dusts in the Ore Dictionary and WILL make nuggets in the Infernal Furnace. Dartcraft doesn't let you turn ingots into dusts, so there's no infinite feedback loop there either.