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Explain concentration by magnetic separa...

Explain concentration by magnetic separation with diagram.

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(i) Magnetic separation is applicable to ferromagnetic ores and it is based on the difference in the magnetic properties of the ore and the impurities.
(ii) For example tin stone can be separated from the wolframite impurities which is magnetic.
(iii) Similarly, ores such as chromite, pyrolusite havig magnetic property can be removed from the non magnetic siliceous impurities.
(iv) The crushed ore is pured on to an electromagnetic separator consisting of an belt moving over two rollers of which one is magnetic.
(v) The magnetic part of the ore is attached towards the magnet and falls as a heap close to the magnetic region while the nonmagnetic part falls away from it as shown in the figure.
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