Question

Copper Pyrites are concentrated by:

A. Electromagnetic Method

B. Gravity Method

C. Froth Floatation methods

D. All the above methods

Answer 1

Hint: In order to answer the question, first we have to find the convenient way of extraction of copper from the copper pyrites. Then we will discuss the particular method to concentrate the copper pyrites.

Complete answer:

This method is used when a higher ore contains impurities with higher density. This method is used for the concentration of Sulphide ores. (Eg: Copper pyrites, iron pyrites, Galena, Zinc blende etc.) Copper is mainly extracted from copper pyrites. After the concentration of its metal by froth flotation process, the metal is cooked in a current of air to eliminate arsenic, antimony and quite a bit of sulphur.

The primary ore of copper will be copper pyrite and copper is separated from this ore. The various strides in extraction of copper are: Crushing and Concentration: The metal got from mines are separated into little pieces by jaw smasher and afterward pulverized. The ore being sulphide mineral is concentrated by foam floatation process. 

The strategy used to remove copper from its metals relies upon the idea of the metal. Sulphide minerals, for example, chalcopyrite are changed over to copper by a divergent strategy from silicate, carbonate or sulphate metals. The important mineral of copper will be copper pyrite and copper is removed from this metal.

Hence the correct answer is (C).

Note: Copper Pyrites crystallizes in the tetragonal system but is usually found in the massive form. Chalcopyrite is of primary origin and occurs in igneous and metamorphic rocks and in metalliferous veins.