Question

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

• A. Froth floatation
• B. Magnetic Separation
• C. Levigation or Gravity Separation
• D. All of the above

Answer 1

Answer: (B), (C)

The correct options are
B

Magnetic Separation

C

Levigation or Gravity Separation

$Sn{O}_2$ contains some magnetic impurities $(FeW{O}_4+MnW{O}_4)$ 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.