Translations:Steel making/15/en
Smelting Process
With a finished refractory furnace build, the next step requires the player to fill the coffin.
One stone coffin will hold a total of 16 iron ingots and 40 fuel pieces - either coke or charcoal. Place down one layer of fuel first, then one layer of iron ingots. Repeat until the coffin is full and will not accept any more items. The coffin should allow 5 layers of fuel with 8 pieces per layer, and 4 layers of iron ingots with 4 ingots per layer.
Once filled, the coffin tool tip will indicate that a coffin lid needs to be placed on top of the coffin. Note that the coffin needs to be filled completely, otherwise the process will not start even if the lid is placed and coal beneath ignited.
After the coffin is closed, the player should leave the burning chamber and close the door. It is not recommended to enter the chamber again in the middle of the smelting process, as the extreme heat inside will cause 5 HP damage per tick if inside while the bricks are still heated. The coffin tool tip will indicate that the process requires fuel to be placed and ignited below the two grates under the coffin.
Access the underbelly of the furnace as shown above from the side or the back of the furnace. Place fuel in equal amounts on the two spaces directly below the coffin. Each fuel layer on one block takes 2 fuel items, meaning a full layer on both blocks requires 4 fuel items. Charcoal, black coal, anthracite and coke work as possible fuel items.
When testing out the process in creative or survival, keep in mind that the coffin tooltip might take a few seconds to update correctly from one state to the next, specifically once the player ignites fuel below. The coffin will show the progress in percentages, but again it might take a tick until that progress info is shown correctly. A working furnace will have fire particles inside the burning chamber - which also indicates the danger of stepping inside at that time - as well as smoke rising from the chimney.