The Rock Melter is a machine from RotaryCraft that uses high temperatures to liquefy certain items.
The rock melter's primary use is to make Lava from Netherrack, Cobblestone, Stone Bricks and Stone. It is also used to liquefy Ethanol Crystals into Ethanol which can be piped into engines for power generation. If you have ChromatiCraft installed, the rock melter can be used to create liquid crystal from crystal shards. Liquid Ender can also be made by placing ender pearls in the rock melter.