copper pyrite is ore of copper but only a mineral of iron. Justify
Answers
Answer:
Chalcopyrite is a copper iron sulfide mineral and the most abundant copper ore mineral. It has the chemical formula CuFeS2 and crystallizes in the tetragonal system. It has a brassy to golden yellow color and a hardness of 3.5 to 4 on the Mohs scale. Its streak is diagnostic as green tinged black.
On exposure to air, chalcopyrite tarnishes to a variety of oxides, hydroxides, and sulfates. Associated copper minerals include the sulfides bornite (Cu5FeS4), chalcocite (Cu2S), covellite (CuS), digenite (Cu9S5); carbonates such as malachite and azurite, and rarely oxides such as cuprite (Cu2O). Is rarely found in association with native copper. Chalcopyrite is a conductor of electricity.
Answer:
Copper metal is extracted from copper pyrite. Copper iron sulphide (CuFeS2) is first concentrated by the froth flotation process and then is roasted (i.e. heating in excess of oxygen) in a reverberatory furnace. On roasting, copper pyrite gives a mixture of iron sulphide or ferrous sulphide (FeS) and cuprous sulphide (Cu2S) then Ferrous sulphide is oxidized to form ferrous oxide (FeS). There are four main types of iron ore deposit: massive hematite, which is the most commonly mined, magnetite, titanomagnetite, and pisolitic ironstone.