Main types of metallurgical processes
Various metallurgical processes can be broadly divided into three main types
(1) Pyrometallurgy : Extraction is done using heat energy. The metals such as Hg Zn, Cu, Fe, Pb, Ni, Cr, Sn, etc. Which are found in the nature in the form of oxides, sulphides carbonates, are extracted by this process.
(2) Hydrometallurgy : Extraction of metals involving aqueous solution is known as hydrometallurgy. The metals such as silver, gold etc are extracted by this method.
(3) Electrometallurgy : Extraction of the highly reactive metals such as Ca, Na, Al K, Mg, etc. by carrying the electrolysis of one of the suitable compound in fused or the molten state.
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