The Infernal Furnace is a Mystical Construct introduced in Thaumcraft 3. It is made by placing in the world (not in the crafting table) one iron bar, one lava source, 12 obsidian, and 12 nether brick. Before use, you must right click on one of the furnace blocks with a wand containing at least 100 vis. The Infernal Furnace requires no fuel. Items can be smelted by dropping them into the lava from the top. When finished, the items be dispensed through the iron bars in the front.
Occasionally, smelting can give you extra materials in the form of nuggets. However, the chances of this are very low if you have no Arcane Bellows installed. It uses up a little bit of Vis to smelt things, and sometimes flux escapes into the aura. 'It is possibly broken during the'3.0.2 release.
Mining any part of the Infernal Furnace will return its blocks to their original state, remove the lava, and spawn a blaze in the center of the construct. (verified in 3.0.3. version)
By capturing a Blaze and harnessing its energy within a furnace crafted from obsidian and netherbrick you have created a highly efficient and fuel free furnace. So efficient in fact, that occasionally it will produce bonus material in the form of nuggets or other items.
It does however consume a small amount of vis to smelt items. It should also be noted that the magic holding the Blaze is a somewhat fragile and the occasional bit of Flux escapes into the aura, but when is progress not without risk?
Items you wish to smelt needs to be dropped into the top of the furnace and will be spit out the front.
Working with GolemsEdit
For more advanced mages, consider assigning a Clay Golem (preferably the advanced version) to a dispenser on top of the furnace. Connect the dispenser to some redstone circuitry (or a button) and put a chest somewhere nearby (In the image below, it's next to the button below the bellows). That way, the Golem will keep the dispenser stocked with an ore (or multiple kinds if the advanced version) which the dispenser will eject into the furnace whenever you press the button.
SIDE NOTE: You may need to ring the top on the layer of the dispenser with blocks but leave a hole in front of the dispenser. This is to stop it from overshooting the hole and missing the furnace entirely!
You can add up to 3 Arcane Bellows to the sides to increase smelting speed, chance of producting bonus items, and reduce flux output.
- Even though Thaumonomicon talks about Blaze, no materials acquired from Blaze are required to make the Infernal Furnace.