21can koi tell , which ALL metal is/are CALCINATED??
Pl. mention the imp. points of Extraction of varoious elements here........
Main points cud include :
Purification, Main Method of exctraction, Concentration n Purification........
Self-Reduction n Carbon reduction r imp.
Lead is Self - Reduced!!
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3 Answers
11calcination is only a purification technique in which the ore is converted to the oxide (also the volatile matter escapes ).
it's used in case of Al,Fe,Zn,Ca.
13Calcination is done for hydrated oxides and carbonates.
Roasting is applied to sulphides