The ore on heating
produces sulphur dioxide gas so it is a sulphide ore. The method used for its
concentration is "froth floatation process". After concentration of
the ore following two steps would be followed to convert it into metal.
(i) Roasting: The sulphide ore is converted into its
oxide by heating it in the presence of air.
O2 MO + SO2
of metal oxide to metal: The oxide formed by roasting is then reduced to
metal by using a suitable reducing agent like carbon (coke).
+ C M + CO
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