Q. Which one is not a method of concentration of ore.
Solution:
- In smelting , the concentrated oxide ores like haematite , tin stone even after concentration , is heated with flux to remove the acidic or basic impurities forming the slag.
- An example is the reduction of iron ore (iron oxide) by coke in a blast furnace to produce pig iron.
- Froth Flotation method is mainly used to remove gangue from sulphide ores.
- Washing in a current of water is a gravity concentration method in which lighter particles are carried away by the current and heavier (ore) particles are collected at the bottom.
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