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|This article is about Railcraft's Blast Furnace. You may be looking for Industrial Blast Furnace.|
The Blast Furnace is a 3x3x4 Multiblock structure used to convert Iron into Steel, smelt aluminum dust, and salvage metal from some items, among other things. The oven is built out of 34 Blast Furnace Bricks constructed in a 3 wide, 3 deep, 4 high box:
- Base and top layers: 3x3
- Middle two layers: 3x3 with hollow center
So the layout is this:
base layer second layer third layer top layer xxx xxx xxx xxx xxx x x x x xxx xxx xxx xxx xxx
The Blast Furnace usually* requires a trip to a Nether Fortress. Ingredients required:
-*You can get Nether Brick by compressing Netherrack in a Compressor and in Minecraft 1.5, you can get Nether Bricks by smelting Netherrack into Nether Brick, four of which can be crafted into a 'Nether Bricks', as if Netherrack were clay.
Two Blast Furnace Bricks will be left over after constructing the furnace. When building a Blast Furnace, you will know it is complete when a window appears in the bottom middle block on the sides. Blast Furnaces cannot be built directly adjacent to each other - there must be a gap of at least one block between them.
The Blast Furnace accepts only two types of fuel: Charcoal or Coal Coke. It will take 2 minutes and 8 seconds and will consume two pieces of Coal Coke or four pieces of Charcoal to convert one Iron Ingot into a Steel Ingot. The same amount applies to aluminum.
While the Blast Furnace is active, the center will contain lava, which can spill out if the furnace is broken.
The furnace can be loaded and unloaded automatically like other machines. The entire furnace is treated as a single block, similar to a large vanilla furnace. It will accept Coal Coke, Charcoal, and Iron from any side and will output Steel only from the sides. When using Redpower tubes, the bottom is for adding fuel (charcoal, etc.), the top is for input (aluminum dust, etc.), and the sides are for extracting the furnace output.