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Infernal Furnace (Thaumcraft 3)
You must research it after researching the Unified Thaumic Field Theory. It is a 3x3x3 structure made with 12 obsidian, 12 nether brick, 1 iron bar, and a bucket of lava. After building the structure, you must then right click it with a Wand of the Adept or higher to create the furnace. The wand must contain at least 100 Vis.
The completed furnace has an opening on its top where items are thrown in to be smelted. Multiple items can be thrown in either stacked or individual, but will be processed in the same order they arrived. If the furnace receives an item which cannot be cooked or smelted, that item is destroyed. Valid items take a few seconds to cook before the result is ejected out the front of the oven (along with the XP the item normally gives). As a bonus, the furnace has a chance to spit out extra nuggets when smelting ores, crystalline metal from Factorization (if this mod is installed) and cooking meat (This is the only way to get meat nuggets). Note that while ore dust can be smelted in the Infernal Furnace, it will not yield any ore nuggets.
Arcane Bellows can be attached to the 3 holes on the sides to increase the speed, chance of nuggets, and decrease flux output. If RotaryCraft is not installed an Infernal Furnace which has the maximum of 3 Arcane Bellows attached and is used to smelt crystalline metal is the last link in the most efficient ore processing chain.
If you break a block that is part of the furnace after using a wand on it, it will spawn a Blaze. In order to restore the furnace to working condition, you must replace the missing blocks from the structure and then refill the lava in the center as it's consumed when the blaze spawns. After doing so simply wave your wand at it again to restore it. In order to smelt using it, you must toss items you wish to be smelted in through the hole in the top and wait for the cooked or smelted version to pop out of the front.