How does the isolation of metal from its ore work?

Please also state your source.How does the isolation of metal from its ore work?
Heat, My brain.





Smelting


http://en.wikipedia.org/wiki/SmeltingHow does the isolation of metal from its ore work?
Metals are often separated from ores by reduction. The metal may be in an oxidized state. Heating the ore above the metal melting point in the presence of a fuel (carbon) and oxygen may allow the oxygen to leave the ore and combine with the carbon. The slag (minerals) if molten will float on the liquid metal and may be poured or skimmed off.