|This article is about an older version of DF.|
A Magma smelter is a special variation of the basic smelter that uses magma as a source of heat, instead of fuel. Like all magma-powered buildings, it is not visible under the Build menu until your dwarves discover a source of magma to power it.
To function, magma smelters must be built with at least one of the eight edge tiles positioned over an open space, with at least 4/7 magma on the next floor down.
If the only opening to the magma is under the impassable tile of the smelter then magma creatures won't be able to enter the workshop area though the opening.[Verify] Otherwise they can.
Magma powered buildings do not consume the magma.