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Froth flotation process, hydraulic washi...

Froth flotation process, hydraulic washing, magnetic separation, leaching etc are some methods for concentration of ores?
Which of this methods is useful for the separation of copper pyrites?
b) Write the reason for choosing this method.

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a) Froth flotation
b) The impurities present in the ore have high density and the ore has a low density. Hence froth flotation process is choosen
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