Smelting is the process of extracting a metal (such as tin or copper) from its ore. Most minerals are a chemical compound of the metal with other elements, such as sulfur or oxygen. For example, zinc is more reactive than copper, so it must be smelted.
Smelting is a process of applying heat to ore to extract a base metal. It is a form of extractive metallurgy. Smelting uses heat and a reducing chemical agent to break down the ore, expelling other elements such as gases or slag and leaving the metal base behind.