1.

Describe magnetic separation.

Answer»

Solution :(1) This METHOD is based on the differences in magnetic properties
of ore and gangue.

(2) Either ore or gangue must have magnetic properties, which is
attracted by a magnet and get separated.
(3) In this method, an electromagnetic separator consisting of
leather or brass belt moving over two rollers, one of which is fitted with
magnets is used.
(4) When the finely powdered ore is DROPPED over the moving belt
at one end. the magnetic portion of the ore is attracted and froms one
heap near to the roller while non-magnetic gangue falls away and FORMS
ANOTHER heap. Hence ore can be separated from the imprtites. For
example non-magnetic ore of `SnO_(2)` can be separated from magnetic
impurities of wolframite, `FeWO_(4) cdot MnWO_(4).`


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