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Explain concentration of ore by : (i) Hydraulic Washing (ii) Magnetic Separation |
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Answer» Solution :(i) HYDRAULIC Washing: Principle : The method is based on the difference between specific gravities of the ORE and the gangue particles. In hydraulic washing, an upward stream of running water is used to wash the powdered ore. The lighter gangue particles are washed away and the heavier ore particles are left behind. The method is also referred as Gravity SEPARATION (ii) Magnetic Separation :  Principle : The method is based on differences in magnetic properties of the ore components. In this method, the powdered ore is dropped over a conveyer BELT which moves over a magnetic roller as shown in a figure. Magnetic separation, either ore or gangue particles remains attracted towards the belt and falls close to it. For example : IRON ores are concentrated by this method. |
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