Define enrichment of ore. Write its various methods.
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The processes used for removing the gangue from the ore are based on the
differences between the physical or chemical properties of the gangue
and the ore. At first the ore is crushed to powder. The pulverized ore
is separated by physical processes like hydraulic washing,
froth-floatation, and magnetic separation or by chemical processes,
depending on the nature of the ore and its impurities. Concentration of
the ore is also known as 'dressing' or 'enrichment' of ore.
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