Which of the following methods are employed in the extraction of Sn from Cassiterite?

Froth floatation

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Magnetic Separation

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Levigation or Gravity Separation

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All of the above

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Solution

The correct options are
B
Magnetic Separation

C
Levigation or Gravity Separation

$S n O_{2}$ contains some magnetic impurities $(F e W O_{4} + M n W O_{4})$ which will at some point (during the extractive metallurgical process) be removed using magnetic separation. In general, this step happens just before the carbon reduction stage.

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Which of the following methods are employed in the extraction of tin from cassiterite?

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