Which one of the following is not a method of concentration of ore?
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a
electromagnetic separation
b
smelting
c
gravity separation
d
froth flotation process
answer is B.
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Detailed Solution
In smelting the concentrated oxide ores like haematite, is heated with flux to remove the acidic or basic impurities forming the slag. All other processes are used for removing the earthy/siliceous impurities.