to melt; to thaw; to fuse; to dissolve
melting; liquefying; fusion
smelting furnace; blast furnace
to dissolve (paint); to scramble (eggs); to melt (metal, etc.); to mix (water with flour, etc.)
core meltdown; meltdown; nuclear reactor core meltdown
slag; molten slug (of metal)
weld; welding; deposition
flash smelting; autogenous smelting