Explain the method of concentration of copper pyrites – the ore of copper.
Copper pyrite (Cu2S) is the ore of copper in the sulphide form so here method of froth-floatation should be used for concentration.
In this method, the fine powder of ore and water are filled in a big vessel and pine or turpentine oil is added to it. The sulphide particles of metals get wet and stick to it, while impurities do not get wet.
In this liquid mixture, air is passed with pressure through a tube. Hence, froth is produced around the light particles of the sulphide ore and comes to the surface of the liquid mixture.
The impurities get wet by water and settles down and the ore is removed with sieves and washed with water.
By this method clay, sand, etc are removed.
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